PI3301-20-LGIZ_技术文档

Cool-Power^®

ZVS Switching Regulators

PI33xx-x0

8V to 36V_INCool-Power ZVS Buck Regulator Family

Product Description

Features & Beneﬁts

The PI33xx-x0 is a family of high efﬁciency, wide input range

DC-DC ZVS-Buck regulators integrating controller, power

switches, and support components all within a high density

System-in-Package (SiP). The integration of a high performance

Zero-Voltage Switching (ZVS) topology, within the PI33xx-x0

series, increases point of load performance providing best in class

power efﬁciency. The PI33xx-x0 requires only an external inductor

and minimal capacitors to form a complete DC-DC switching

mode Buck Regulator.

• High Efﬁciency ZVS-Buck Topology

• Wide input voltage range of 8V to 36V

• Very-Fast transient response

• High accuracy pre-trimmed output voltage

• User adjustable soft-start & tracking

• Power-up into pre-biased load (select versions)

• Parallel capable with single wire current sharing

• Input Over/Undervoltage Lockout (OVLO/UVLO)

• Output Overvoltage Protection (OVP)

• Overtemperature Protection (OTP)

• Fast and slow current limits

Output Voltage

Device

I_OUTMax

Set

Range

• -40°C to 125°C operating range (T_J)

• Optional I²C functionality & programmability:

ꢀnV_OUTmargining

PI3311-x0

PI3318-x0

PI3312-x0

PI3301-x0

PI3302-x0

PI3303-x0

PI3305-x0

1.0V

1.8V

2.5V

3.3V

5.0V

12V

15V

1.0 to 1.4V

1.4 to 2.0V

2.0 to 3.1V

2.3 to 4.1V

3.3 to 6.5V

6.5 to 13.0V

10.0 to 16.0V

10A

8A

ꢀnFault reporting

ꢀnEnable and SYNCI pin polarity

ꢀnPhase delay (interleaving multiple regulators)

8A

Applications

The ZVS architecture also enables high frequency operation while

minimizing switching losses and maximizing efﬁciency. The high

switching frequency operation reduces the size of the external

ﬁltering components, improves power density, and enables very

fast dynamic response to line and load transients. The PI33xx-x0

series sustains high switching frequency all the way up to the

rated input voltage without sacriﬁcing efﬁciency and, with its 20

ns minimum on-time, supports large step down conversions up

to 36V_IN.

• Rugged, defense applications

• High efﬁciency systems

• High voltage battery operation

Package Information

•

10mm x 14mm x 2.6mm LGA SiP

10.5mm x 14.5mm x 2.6mm BGA SiP

*I²C is a trademark of NXP Semiconductors

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

Contents

Page

3

Contents

Page

34

35

36

37

38

39

41

Order Information

Application Description

Output Voltage Trim

Soft-Start Adjust and Tracking

Inductor Pairing

Absolute Maximum Ratings

Block Diagram

4

Pin Description

5

Package Pin-Out

5

Thermal Derating

PI3311-x0 (1.0 V_OUT) Electrical Characteristics

PI3318-x0 (1.8 V_OUT) Electrical Characteristics

PI3312-x0 (2.5 V_OUT) Electrical Characteristics

PI3301-x0 (3.3 V_OUT) Electrical Characteristics

PI3302-x0 (5.0 V_OUT) Electrical Characteristics

PI3303-x0 (12.0 V_OUT) Electrical Characteristics

PI3305-x0 (15.0 V_OUT) Electrical Characteristics

Functional Description

6

Filter Considerations

Layout Guidelines

9

12

16

20

24

28

32

33

34

Recommended PCB Footprint and Stencil

Package Drawings

Revision History

Warranty

42

ENABLE (EN)

Remote Sensing

Switching Frequency Synchronization

Soft-Start

Output Voltage Trim

Output Current Limit Protection

Input Undervoltage Lockout

Input Overvoltage Lockout

Output Overvoltage Protection

Overtemperature Protection

Pulse Skip Mode (PSM)

Variable Frequency Operation

Parallel Operation

I²C Interface Operation

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PI33xx-x0

Order Information

Output Range

Transport

Media

Cool-Power

I_OUTMax

Package

Set

Range

PI3311-00-LGIZ

PI3318-00-LGIZ

PI3312-00-LGIZ

PI3301-00-LGIZ

PI3302-00-LGIZ

PI3302-00-BGIZ

PI3303-00-LGIZ

PI3305-00-LGIZ

1.0V

1.8V

2.5V

3.3V

5.0V

12V

1.0 to 1.4V

1.4 to 2.0V

2.0 to 3.1V

2.3 to 4.1V

3.3 to 6.5V

6.5 to 13.0V

10.0 to 16.0V

10A

8A

10mm x 14mm 123-pin LGA

10.5mm x 14.5mm BGA

TRAY

10mm x 14mm 123-pin LGA

15V

8A

I²C Functionality & Programmability

Output Range

Transport

Media

Cool-Power

I_OUTMax

Package

Set

1.0V

1.8V

2.5V

3.3V

5.0 V

12V

Range

PI3311-20-LGIZ

PI3318-20-LGIZ

PI3312-20-LGIZ

PI3301-20-LGIZ

PI3302-20-LGIZ

PI3303-20-LGIZ

PI3305-20-LGIZ

1.0 to 1.4V

1.4 to 2.0V

2.0 to 3.1V

2.3 to 4.1V

3.3 to 6.5V

6.5 to 13.0V

10.0 to 16.0V

10A

10 A

10A

8A

10mm x 14mm 123-pin LGA

TRAY

15V

8A

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

Absolute Maximum Ratings

Name

V_IN

Rating

-0.7 to 36V

-0.7 to 36V, -4V for 5ns

100mA

VS1

SGND

PGD, SYNCO, SYNCI, EN, EAO, ADJ, TRK, ADR1, ADR2, SCL, SDA, REM -0.3V to 5.5V / 5mA

PI3311-x0-LGIZ

PI3318-x0-LGIZ

PI3312-x0-LGIZ

PI3301-x0-LGIZ

PI3302-x0-LGIZ

PI3303-x0-LGIZ

PI3305-x0-LGIZ

-0.3V to 5.5V

-0.5V to 9V

-0.8V to 13V

-1.0V to 18V

-1.5V to 21V

-3.6V to 25V

-4.5V to 25V

-65°C to 150°C

-40°C to 125°C

245°C

V_OUT

Storage Temperature

Operating Junction Temperature

Soldering Temperature for 20 seconds

ESD Rating

2kV HBM

Notes: At 25°C ambient temperature. Stresses beyond these limits may cause permanent damage to the device. Operation at these conditions or conditions

beyond those listed in the Electrical Speciﬁcations table is not guaranteed. All voltage nodes are referenced to PGND unless otherwise noted. Test conditions

are per the speciﬁcations within the individual product electrical characteristics.

Functional Block Diagram

Simpliﬁed Block Diagram (I²C pins SCL, SDA, ADR0, and ADR1 only active for PI33xx-20 device versions)

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

Pin Description

Pin Name

SGND

Number

Description

Signal Ground: Internal logic ground for EA, TRK, SYNCI, SYNCO, ADJ and I²C (options) communication

returns. SGND and PGND are star connected within the regulator package.

Block 1

PGND

V_IN

Block 2

Block 3

Block 5

Block 4

A1

Power Ground: V_INand V_OUTpower returns.

Input Voltage: and sense for UVLO, OVLO and feed forward ramp.

Output Voltage: and sense for power switches and feed-forward ramp.

Switching Node: and ZVS sense for power switches.

V_OUT

VS1

PGD

EAO

Parallel Good: Used for parallel timing management intended for lead regulator.

Error Amp Output: External connection for additional compensation and current sharing.

A2

Enable Input: Regulator enable control. Asserted high or left ﬂoating – regulator enabled;

EN

A3

A5

B1

Asserted low, regulator output disabled. Polarity is programmable via I²C interface.

REM

ADJ

Remote Sense: High side connection. Connect to output regulation point.

Adjust Input: An external resistor may be connected between ADJ pin and SGND or V_OUT

to trim the output voltage up or down.

Soft-start and Track Input: An external capacitor may be connected between TRK pin

and SGND to decrease the rate of rise during soft-start.

TRK

NC

C1

K3, A4

K4

No Connect: Leave pins ﬂoating.

Synchronization Output: Outputs a low signal for ½ of the minimum period for synchronization of other

converters.

SYNCO

Synchronization Input: Synchronize to the falling edge of external clock frequency.

SYNCI is a high impedance digital input node and should always be connected to SGND when not in use.

SYNCI

K5

SDA

SCL

D1

E1

Data Line: Connect to SGND for PI33xx-00. For use with PI33xx-20 only.

Clock Line: Connect to SGND for PI33xx-00. For use with PI33xx-20 only.

Tri-state Address: No connect for PI33xx-00. For use with PI33xx-20 only.

ADR1

ADR0

H1

G1

Package Pin-Out

PGND

Block 2

Block 1: B2-4, C2-4, D2-3, E2-3, F1-3, G2-3, H2-3, J1-3, K1-2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

K

SGND

Block 1

J

H

G

F

VIN

Block 3

Block 2: A8-10, B8-10, C8-10, D8-10, E4-10,

ADR1

ADR0

SGND

F4-10, G4-10, H4-10, J4-10, K6-10

Block 3: G12-14, H12-14, J12-14, K12-14

Block 4: A12-14, B12-14, C12-14, D12-14, E12-14

Block 5: A6-7, B6-7, C6-7, D6-7

SCL

SDA

TRK

ADJ

E

D

C

B

VS1

Block 4

PGD

A

VOUT

Block 5

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

PI3311-x0-LGIZ (1.0V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN=24V, L1 = 125nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Input Speciﬁcations

Minimum 1mA load required

V_IN= 24V, T_C= 25°C, I_OUT=10A

Input Voltage

Input Current

V_{IN_DC}

I_{IN_DC}

8

24

36

20

V

476

mA

Input Current At Output Short

(fault condition duty cycle)

[2]

I_{IN_Short}

mA

Disabled

2.0

2.5

mA

Input Quiescent Current

Input Voltage Slew Rate

I_{Q_VIN}

V_{IN_SR}

Enabled (no load)

1

V/μs

Output Speciﬁcations

[2]

Output Voltage Total Regulation

Output Voltage Trim Range

Line Regulation

V_{OUT_DC}

0.987

1.0

1.013

1.4

V

[3]

∆V_OUT( ∆V_IN) @25°C, 8V <V_IN<36V

0.10

20

%

Load Regulation

∆V_OUT(∆I_OUT) @25°C, 0.5A <I_OUT<10A

%

Output Voltage Ripple

V_{OUT_AC}

I_{OUT_DC}

I_{OUT_CL}

I_OUT= 5A, C_OUT= 8 x 100μF, 20MHz BW ^[4]

mVp-p

Continuous Output

Current Range

^[5]Min 1mA load required

10

A

Current Limit

12

Protection

V_INUVLO Start Threshold

V_INUVLO Stop Threshold

V_INUVLO Hysteresis

V_{UVLO_START}

V_{UVLO_STOP}

V_{UVLO_HYS}

V_{OVLO_START}

V_{OVLO_STOP}

V_{OVLO_HYS}

t_{f_DLY}

7.10

6.80

7.60

7.25

0.33

38.4

8.00

7.60

V

V_INOVLO Start Threshold

V_INOVLO Stop Threshold

V_INOVLO Hysteresis

37.0

36.1

V

0.77

128

500

20

V

V_INUVLO/OVLO Fault Delay Time

V_INUVLO/OVLO Response Time

Output Overvoltage Protection

Number of the switching freq cycles

Above V_OUT

Cycles

ns

%

t_f

V_OVP

Overtemperature

Fault Threshold

T_OTP

130

135

30

140

°C

Overtemperature

Restart Hysteresis

T_{OTP_HYS}

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

PI3311-x0-LGIZ (1.0V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN=24V, L1 = 125nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Timing

[6]

Switching Frequency

Fault Restart Delay

f_S

500

30

kHz

ms

t_{FR_DLY}

Sync In (SYNCI)

Synchronization Frequency

Range

∆f_SYNC

I

Relative to set switching frequency ^[3]

50

110

%

V

SYNCI Threshold

V_SYNCI

2.5

Sync Out (SYNCO)

Source 1mA

SYNCO High

V_{SYNCO_HI}

V_{SYNCO_LO}

t_{SYNCO_RT}

t_{SYNCO_FT}

4.5

V

SYNCO Low

Sink 1mA

0.5

SYNCO Rise Time

SYNCO Fall Time

20pF load

10

ns

20pF load

Soft Start And Tracking

TRK Active Input Range

TRK Max Output Voltage

TRK Disable Threshold

Charge Current (Soft – Start)

Discharge Current (Fault)

Soft-Start Time

V_TRK

Internal reference tracking range

0

1.04

V

1.2

40

V

V_{TRK_OV}

I_TRK

I_{TRK_DIS}

t_SS

20

60

mV

μA

mA

ms

-70

-50

6.8

2.2

-30

C_TRK= 0μF

Enable

High Threshold

V_{EN_HI}

V_{EN_LO}

V_{EN_HYS}

0.9

0.7

100

1

1.1

0.9

300

V

Low Threshold

0.8

200

Threshold Hysteresis

mV

Enable Pull-Up Voltage

(ﬂoating, unfaulted)

V_{EN_PU}

V_{EN_PD}

With positive logic EN polarity

With negative logic EN polarity

2

0

V

Enable Pull-Down Voltage

(ﬂoating, faulted)

Source Current

Sink Current

I_{EN_SO}

I_{EN_SK}

With positive logic EN polarity

With negative logic EN polarity

-50

50

μA

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

PI3311-x0-LGIZ (1.0V_OUT) Electrical Characteristics

100

95

90

85

80

75

12V_IN

24V_IN

36V_IN

70

65

60

55

50

0

1

2

3

4

5

6

7

8

10

9

Load Curent (A)

Figure 4 — Transient Response 2A to 7A, at 5A/µs

Figure 1 — Efﬁciency at 25°C

Figure 2 — Short Circuit Test

Figure 5 — Output Ripple 24V_IN, 1.0V_OUTat 10A

600

500

400

300

12V_IN

24V_IN

36V_IN

200

100

0

1

2

3

4

5

6

7

8

10

9

Load Curent (A)

Figure 3 — Switching Frequency vs. Load Current

Figure 6 — Output Ripple 24V_IN, 1.0V_OUTat 5A

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

PI3318-x0-LGIZ (1.8V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN=24V, L1 = 155nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Input Speciﬁcations

Minimum 1mA load required

V_IN= 24V, T_C= 25°C, I_OUT=10A

Input Voltage

Input Current

V_{IN_DC}

I_{IN_DC}

8

24

36

20

V

835

mA

Input Current At Output Short

(fault condition duty cycle)

[2]

I_{IN_Short}

mA

Disabled

2.0

2.5

mA

Input Quiescent Current

Input Voltage Slew Rate

I_{Q_VIN}

V_{IN_SR}

Enabled (no load)

1

V/μs

Output Speciﬁcations

[2]

Output Voltage Total Regulation

Output Voltage Trim Range

Line Regulation

V_{OUT_DC}

1.773

1.4

1.8

1.827

2.0

V

[3]

∆V_OUT( ∆V_IN) @25°C, 8V <V_IN<36V

∆V_OUT(∆I_OUT) @25°C, 0.5A <I_OUT<10A

0.10

25

%

Load Regulation

%

Output Voltage Ripple

V_{OUT_AC}

I_{OUT_DC}

I_{OUT_CL}

I_OUT= 5A, C_OUT= 6 x 100μF, 20MHz BW ^[4]

mVp-p

Continuous Output

Current Range

[5]

10

A

Current Limit

12

Protection

V_INUVLO Start Threshold

V_INUVLO Stop Threshold

V_INUVLO Hysteresis

V_{UVLO_START}

V_{UVLO_STOP}

V_{UVLO_HYS}

V_{OVLO_START}

V_{OVLO_STOP}

V_{OVLO_HYS}

t_{f_DLY}

7.10

6.80

7.60

7.25

0.33

38.4

8.00

7.60

V

V_INOVLO Start Threshold

V_INOVLO Stop Threshold

V_INOVLO Hysteresis

37.0

36.1

V

0.77

128

500

20

V

V_INUVLO/OVLO Fault Delay Time

V_INUVLO/OVLO Response Time

Output Overvoltage Protection

Number of the switching freq cycles

Above V_OUT

Cycles

ns

%

t_f

V_OVP

Overtemperature

Fault Threshold

T_OTP

130

135

30

140

°C

Overtemperature

Restart Hysteresis

T_{OTP_HYS}

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

PI3318-x0-LGIZ (1.8V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN=24V, L1 = 155nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Timing

[6]

Switching Frequency

Fault Restart Delay

f_S

600

30

kHz

ms

t_{FR_DLY}

Sync In (SYNCI)

Synchronization Frequency

Range

∆f_SYNC

I

Relative to set switching frequency ^[3]

50

110

%

V

SYNCI Threshold

V_SYNCI

2.5

Sync Out (SYNCO)

Source 1mA

SYNCO High

V_{SYNCO_HI}

V_{SYNCO_LO}

t_{SYNCO_RT}

t_{SYNCO_FT}

4.5

V

SYNCO Low

Sink 1mA

0.5

SYNCO Rise Time

SYNCO Fall Time

20pF load

10

ns

20pF load

Soft Start And Tracking

TRK Active Input Range

TRK Max Output Voltage

TRK Disable Threshold

Charge Current (Soft – Start)

Discharge Current (Fault)

Soft-Start Time

V_TRK

Internal reference tracking range

0

1.04

V

1.2

40

V

V_{TRK_OV}

I_TRK

I_{TRK_DIS}

t_SS

20

60

mV

μA

mA

ms

-70

-50

6.8

2.2

-30

C_TRK= 0μF

Enable

High Threshold

V_{EN_HI}

V_{EN_LO}

V_{EN_HYS}

0.9

0.7

100

1

1.1

0.9

300

V

Low Threshold

0.8

200

Threshold Hysteresis

mV

Enable Pull-Up Voltage

(ﬂoating, unfaulted)

V_{EN_PU}

V_{EN_PD}

With positive logic EN polarity

With negative logic EN polarity

2

0

V

Enable Pull-Down Voltage

(ﬂoating, faulted)

Source Current

Sink Current

I_{EN_SO}

I_{EN_SK}

With positive logic EN polarity

With negative logic EN polarity

-50

50

μA

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

PI3318-x0-LGIZ (1.8V_OUT) Electrical Characteristics

100

95

90

85

8V_IN

80

75

12V_IN

24V_IN

36V_IN

70

65

60

55

50

0

1

2

3

4

5

6

7

8

10

9

Load Curent (A)

Figure 10 — Transient Response 2A to 7A, at 5A/µs

Figure 7 — Efﬁciency at 25°C

Figure 8 — Short Circuit Test

Figure 11 — Output Ripple 24V_IN, 1.8V_OUTat 10A

700

600

500

400

300

8V_IN

12V_IN

24V_IN

36V_IN

200

100

0

1

2

3

4

5

6

7

8

10

9

Load Curent (A)

Figure 9 — Switching Frequency vs. Load Current

Figure 12 — Output Ripple 24V_IN, 1.8V_OUTat 5A

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

PI3312-x0-LGIZ (2.5V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN= 24V, L1 = 200nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Input Speciﬁcations

[7]

Input Voltage

Input Current

V_{IN_DC}

I_{IN_DC}

8

24

36

20

V

A

V_IN= 24V, T_C= 25°C, I_OUT= 10A

1.14

Input Current At Output Short

(fault condition duty cycle)

[2]

I_{IN_Short}

mA

Disabled

2.0

2.5

mA

Input Quiescent Current

Input Voltage Slew Rate

I_{Q_VIN}

V_{IN_SR}

Enabled (no load)

1

V/μs

Output Speciﬁcations

[2]

Output Voltage Total Regulation

Output Voltage Trim Range

Line Regulation

V_{OUT_DC}

2.465

2.0

2.500

2.5

2.535

3.1

V

[3] [7]

∆V_OUT( ∆V_IN) @25°C, 8V <V_IN<36V

∆V_OUT(∆I_OUT) @25°C, 0.5A <I_OUT<10A

0.10

28

%

Load Regulation

%

Output Voltage Ripple

V_{OUT_AC}

I_{OUT_DC}

I_{OUT_CL}

I_OUT= 5A, C_OUT= 4 x 100μF, 20MHz BW ^[4]

mVp-p

Continuous Output

Current Range

[5] [7]

10

A

Current Limit

12

Protection

V_INUVLO Start Threshold

V_INUVLO Stop Threshold

V_INUVLO Hysteresis

V_{UVLO_START}

V_{UVLO_STOP}

V_{UVLO_HYS}

V_{OVLO_START}

V_{OVLO_STOP}

V_{OVLO_HYS}

t_{f_DLY}

7.10

6.80

7.60

7.25

0.33

38.4

8.00

7.60

V

V_INOVLO Start Threshold

V_INOVLO Stop Threshold

V_INOVLO Hysteresis

37.0

36.1

V

0.77

128

500

20

V

V_INUVLO/OVLO Fault Delay Time

V_INUVLO/OVLO Response Time

Output Overvoltage Protection

Number of the switching freq cycles

Above V_OUT

Cycles

ns

%

t_f

V_OVP

Overtemperature

Fault Threshold

T_OTP

130

135

30

140

°C

Overtemperature

Restart Hysteresis

T_{OTP_HYS}

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

^[7]Minimum 5V between V_IN-V_OUTmust be maintained or a minimum load of 1mA required.

Cool-Power^®ZVS Switching Regulators

Page 12 of 42

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800 927.9474

PI33xx-x0

PI3312-x0-LGIZ (2.5V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN= 24V, L1 = 200nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Timing

[6]

Switching Frequency

Fault Restart Delay

f_S

500

30

kHz

ms

t_{FR_DLY}

Sync In (SYNCI)

Synchronization Frequency

Range

∆f_SYNC

I

Relative to set switching frequency ^[3]

50

110

%

V

SYNCI Threshold

V_SYNCI

2.5

Sync Out (SYNCO)

Source 1mA

SYNCO High

V_{SYNCO_HI}

V_{SYNCO_LO}

t_{SYNCO_RT}

t_{SYNCO_FT}

4.5

V

SYNCO Low

Sink 1mA

0.5

SYNCO Rise Time

SYNCO Fall Time

20pF load

10

ns

20pF load

Soft Start And Tracking

TRK Active Input Range

TRK Max Output Voltage

TRK Disable Threshold

Charge Current (Soft – Start)

Discharge Current (Fault)

Soft-Start Time

V_TRK

Internal reference tracking range

0

1.04

V

1.2

40

V

V_{TRK_OV}

I_TRK

I_{TRK_DIS}

t_SS

20

60

mV

μA

mA

ms

-70

-50

6.8

2.2

-30

C_TRK= 0μF

Enable

High Threshold

V_{EN_HI}

V_{EN_LO}

V_{EN_HYS}

0.9

0.7

100

1

1.1

0.9

300

V

Low Threshold

0.8

200

Threshold Hysteresis

mV

Enable Pull-Up Voltage

(ﬂoating, unfaulted)

V_{EN_PU}

V_{EN_PD}

With positive logic EN polarity

With negative logic EN polarity

2

0

V

Enable Pull-Down Voltage

(ﬂoating, faulted)

Source Current

Sink Current

I_{EN_SO}

I_{EN_SK}

With positive logic EN polarity

With negative logic EN polarity

-50

50

μA

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2 z copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

^[7]Minimum 5V between V_IN-V_OUTmust be maintained or a minimum load of 1mA required.

Cool-Power^®ZVS Switching Regulators

Page 13 of 42

Rev 2.2

08/2016

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800 927.9474

PI33xx-x0

PI3312-x0-LGIZ (2.5V_OUT) Electrical Characteristics

95

90

85

80

12V_IN

75

24V_IN

36V_IN

70

65

60

55

50

0

1

2

3

4

5

6

7

8

10

9

Load Curent (A)

Figure 16 — Transient Response 5A to 10A, at 5A/µs

Figure 13 — Efﬁciency at 25°C

Figure 14 — Short Circuit Test

Figure 17 — Output Ripple 24V_IN, 2.5V_OUTat 10A

600

500

400

300

12V_IN

24V_IN

36V_IN

200

100

0

1

2

3

4

5

6

7

8

10

9

Load Curent (A)

Figure 15 — Switching Frequency vs. Load Current

Figure 18 — Output Ripple 24V_IN, 2.5V_OUTat 5A

Cool-Power^®ZVS Switching Regulators

Page 14 of 42

Rev 2.2

08/2016

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800 927.9474

PI33xx-x0

PI3312-x0-LGIZ (2.5V_OUT) Electrical Characteristics

12

10

8

36V_IN

6

4

2

0

24V_IN

8V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 19 — Load Current vs. Ambient Temperature, 0 LFM

12

10

8

6

4

2

0

36V_IN

24V_IN

8V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 20 — Load Current vs. Ambient Temperature, 400 LFM

12

10

8

36V_IN

6

4

2

0

24V_IN

8V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 21 — Load Current vs. Ambient Temperature, 200 LFM

Cool-Power^®ZVS Switching Regulators

Page 15 of 42

Rev 2.2

08/2016

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800 927.9474

PI33xx-x0

PI3301-x0-LGIZ (3.3V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN=24V, L1 = 200nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Input Speciﬁcations

[7]

Input Voltage

Input Current

V_{IN_DC}

I_{IN_DC}

8

24

36

20

V

A

V_IN= 24V, T_C= 25°C, I_OUT=10A

1.49

Input Current At Output Short

(fault condition duty cycle)

[2]

I_{IN_Short}

mA

Disabled

2.0

2.5

mA

Input Quiescent Current

Input Voltage Slew Rate

I_{Q_VIN}

V_{IN_SR}

Enabled (no load)

1

V/μs

Output Speciﬁcations

[2]

Output Voltage Total Regulation

Output Voltage Trim Range

Line Regulation

V_{OUT_DC}

3.25

2.3

3.30

3.3

3.36

4.1

V

[3] [7]

∆V_OUT( ∆V_IN) @25°C, 8V <V_IN<36V

∆V_OUT(∆I_OUT) @25°C, 0.5A <I_OUT<10A

0.10

37.5

%

Load Regulation

%

Output Voltage Ripple

V_{OUT_AC}

I_{OUT_DC}

I_{OUT_CL}

I_OUT= 5A, C_OUT= 4 x 100μF, 20MHz BW ^[4]

mVp-p

Continuous Output

Current Range

10

A

Current Limit

12

Protection

V_INUVLO Start Threshold

V_INUVLO Stop Threshold

V_INUVLO Hysteresis

V_{UVLO_START}

V_{UVLO_STOP}

V_{UVLO_HYS}

V_{OVLO_START}

V_{OVLO_STOP}

V_{OVLO_HYS}

t_{f_DLY}

7.10

6.80

7.60

7.25

0.33

38.4

8.00

7.60

V

V_INOVLO Start Threshold

V_INOVLO Stop Threshold

V_INOVLO Hysteresis

37.0

36.1

V

0.77

128

500

20

V

V_INUVLO/OVLO Fault Delay Time

V_INUVLO/OVLO Response Time

Output Overvoltage Protection

Number of the switching freq cycles

Above V_OUT

Cycles

ns

%

t_f

V_OVP

Overtemperature

Fault Threshold

T_OTP

130

135

30

140

°C

Overtemperature

Restart Hysteresis

T_{OTP_HYS}

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2 z copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

^[7]Minimum 5V between V_IN-V_OUTmust be maintained or a minimum load of 1 mA required.

Cool-Power^®ZVS Switching Regulators

Page 16 of 42

Rev 2.2

08/2016

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800 927.9474

PI33xx-x0

PI3301-x0-LGIZ (3.3V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN=24V, L1 = 200nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Timing

[6]

Switching Frequency

Fault Restart Delay

f_S

650

30

kHz

ms

t_{FR_DLY}

Sync In (SYNCI)

Synchronization Frequency

Range

∆f_SYNC

I

Relative to set switching frequency ^[3]

50

110

%

V

SYNCI Threshold

V_SYNCI

2.5

Sync Out (SYNCO)

Source 1mA

SYNCO High

V_{SYNCO_HI}

V_{SYNCO_LO}

t_{SYNCO_RT}

t_{SYNCO_FT}

4.5

V

SYNCO Low

Sink 1mA

0.5

SYNCO Rise Time

SYNCO Fall Time

20pF load

10

ns

20pF load

Soft Start And Tracking

TRK Active Input Range

TRK Max Output Voltage

TRK Disable Threshold

Charge Current (Soft – Start)

Discharge Current (Fault)

Soft-Start Time

V_TRK

Internal reference tracking range

0

1.04

V

1.2

40

V

V_{TRK_OV}

I_TRK

I_{TRK_DIS}

t_SS

20

60

mV

μA

mA

ms

-70

-50

6.8

2.2

-30

C_TRK= 0μF

Enable

High Threshold

V_{EN_HI}

V_{EN_LO}

V_{EN_HYS}

0.9

0.7

100

1

1.1

0.9

300

V

Low Threshold

0.8

200

Threshold Hysteresis

mV

Enable Pull-Up Voltage

(ﬂoating, unfaulted)

V_{EN_PU}

V_{EN_PD}

With positive logic EN polarity

With negative logic EN polarity

2

0

V

Enable Pull-Down Voltage

(ﬂoating, faulted)

Source Current

Sink Current

I_{EN_SO}

I_{EN_SK}

With positive logic EN polarity

With negative logic EN polarity

-50

50

μA

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

^[7]Minimum 5V between V_IN-V_OUTmust be maintained or a minimum load of 1mA required.

Cool-Power^®ZVS Switching Regulators

Page 17 of 42

Rev 2.2

08/2016

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800 927.9474

PI33xx-x0

PI3301-x0-LGIZ (3.3V_OUT) Electrical Characteristics

100

95

90

85

80

12V_IN

75

24V_IN

36V_IN

70

65

60

55

50

0

1

2

3

4

5

6

7

8

10

9

Load Curent (A)

Figure 25 — Transient Response 5A to 10A, at 5A/µs

Figure 22 — Efﬁciency at 25°C

Figure 23 — Short Circuit Test

Figure 26 — Output Ripple 24V_IN, 3.3V_OUTat 10A

700

600

500

12V_IN

24V_IN

36V_IN

400

300

200

100

0

1

2

3

4

5

6

7

8

10

9

Load Curent (A)

Figure 24 — Switching Frequency vs. Load Current

Figure 27 — Output Ripple 24V_IN, 3.3V_OUTat 5A

Cool-Power^®ZVS Switching Regulators

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Rev 2.2

08/2016

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800 927.9474

PI33xx-x0

PI3301-x0-LGIZ (3.3V_OUT) Electrical Characteristics

12

10

8

36V_IN

24V_IN

8V_IN

6

4

2

0

50

75

100

125

Ambient Temperature (°C)

Figure 28 — Load Current vs. Ambient Temperature, 0 LFM

12

10

8

6

4

2

0

36V_IN

24V_IN

8V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 29 — Load Current vs. Ambient Temperature, 400 LFM

12

10

8

36V_IN

6

4

2

0

24V_IN

8V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 30 — Load Current vs. Ambient Temperature, 200 LFM

Cool-Power^®ZVS Switching Regulators

Page 19 of 42

Rev 2.2

08/2016

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800 927.9474

PI33xx-x0

PI3302-x0-LGIZ, PI3302-00-BGIZ (5.0V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN= 24V, L1 = 200nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Input Speciﬁcations

[7]

Input Voltage

Input Current

V_{IN_DC}

I_{IN_DC}

8

24

36

20

V

A

V_IN= 24V, T_C= 25°C, I_OUT=10A

2.23

Input Current At Output Short

(fault condition duty cycle)

[2]

I_{IN_Short}

mA

Disabled

2.0

2.5

mA

Input Quiescent Current

Input Voltage Slew Rate

I_{Q_VIN}

V_{IN_SR}

Enabled (no load)

1

V/μs

Output Speciﬁcations

[2]

Output Voltage Total Regulation

Output Voltage Trim Range

Line Regulation

V_{OUT_DC}

4.93

3.3

5.00

5.07

6.5

V

[3] [7]

∆V_OUT( ∆V_IN) @25°C, 8V <V_IN<36V

∆V_OUT(∆I_OUT) @25°C, 0.5A <I_OUT<10A

0.10

30

%

Load Regulation

%

Output Voltage Ripple

V_{OUT_AC}

I_{OUT_DC}

I_{OUT_CL}

I_OUT= 5A, C_OUT= 4 x 47μF, 20MHz BW ^[4]

mVp-p

Continuous Output

Current Range

[5] [7]

10

A

Current Limit

12

Protection

V_INUVLO Start Threshold

V_INUVLO Stop Threshold

V_INUVLO Hysteresis

V_{UVLO_START}

V_{UVLO_STOP}

V_{UVLO_HYS}

V_{OVLO_START}

V_{OVLO_STOP}

V_{OVLO_HYS}

t_{f_DLY}

7.10

6.80

7.60

7.25

0.33

38.4

8.00

7.60

V

V_INOVLO Start Threshold

V_INOVLO Stop Threshold

V_INOVLO Hysteresis

37.0

36.1

V

0.77

128

500

20

V

V_INUVLO/OVLO Fault Delay Time

V_INUVLO/OVLO Response Time

Output Overvoltage Protection

Number of the switching freq cycles

Above V_OUT

Cycles

ns

%

t_f

V_OVP

Overtemperature

Fault Threshold

T_OTP

130

135

30

140

°C

Overtemperature

Restart Hysteresis

T_{OTP_HYS}

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

^[7]Minimum 5V between V_IN-V_OUTmust be maintained or a minimum load of 1mA required.

Cool-Power^®ZVS Switching Regulators

Page 20 of 42

Rev 2.2

08/2016

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800 927.9474

PI33xx-x0

PI3302-x0-LGIZ, PI3302-00-BGIZ (5.0V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN= 24V, L1 = 200nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Timing

[6]

Switching Frequency

Fault Restart Delay

f_S

1.0

30

kHz

ms

t_{FR_DLY}

Sync In (SYNCI)

Synchronization Frequency

Range

∆f_SYNC

I

Relative to set switching frequency ^[3]

50

110

%

V

SYNCI Threshold

V_SYNCI

2.5

Sync Out (SYNCO)

Source 1mA

SYNCO High

V_{SYNCO_HI}

V_{SYNCO_LO}

t_{SYNCO_RT}

t_{SYNCO_FT}

4.5

V

SYNCO Low

Sink 1mA

0.5

SYNCO Rise Time

SYNCO Fall Time

20pF load

10

ns

20pF load

Soft Start And Tracking

TRK Active Input Range

TRK Max Output Voltage

TRK Disable Threshold

Charge Current (Soft – Start)

Discharge Current (Fault)

Soft-Start Time

V_TRK

0

1.04

V

1.2

40

V

V_{TRK_OV}

I_TRK

I_{TRK_DIS}

t_SS

20

60

mV

μA

mA

ms

-70

-50

6.8

2.2

-30

C_TRK= 0μF

Enable

High Threshold

V_{EN_HI}

V_{EN_LO}

V_{EN_HYS}

0.9

0.7

100

1

1.1

0.9

300

V

Low Threshold

0.8

200

Threshold Hysteresis

mV

Enable Pull-Up Voltage

(ﬂoating, unfaulted)

V_{EN_PU}

V_{EN_PD}

With positive logic EN polarity

With negative logic EN polarity

2

0

V

Enable Pull-Down Voltage

(ﬂoating, faulted)

Source Current

Sink Current

I_{EN_SO}

I_{EN_SK}

With positive logic EN polarity

With negative logic EN polarity

-50

50

μA

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

^[7]Minimum 5V between V_IN-V_OUTmust be maintained or a minimum load of 1mA required.

Cool-Power^®ZVS Switching Regulators

Page 21 of 42

Rev 2.2

08/2016

vicorpower.com

800 927.9474

PI33xx-x0

PI3302-x0-LGIZ, PI3302-00-BGIZ (5.0V_OUT) Electrical Characteristics

100

95

90

85

80

75

12V_IN

24V_IN

36V_IN

70

65

60

55

50

0

1

2

3

4

5

6

7

8

10

9

Load Curent (A)

Figure 34 — Transient Response 5A to 10A, at 5A/µs

Figure 31 — Efﬁciency at 25°C

Figure 32 — Short Circuit Test

Figure 35 — Output Ripple 24V_IN, 5.0V_OUTat 10A

1.2

1.0

0.8

0.6

12V_IN

24V_IN

36V_IN

0.4

0.2

0.0

1

2

3

4

5

6

7

8

10

9

Load Curent (A)

Figure 33 — Switching Frequency vs. Load Current

Figure 36 — Output Ripple 24V_IN, 5.0V_OUTat 5A

Cool-Power^®ZVS Switching Regulators

Page 22 of 42

Rev 2.2

08/2016

vicorpower.com

800 927.9474

PI33xx-x0

PI3302-x0-LGIZ, PI3302-00-BGIZ (5.0V_OUT) Electrical Characteristics

12

10

8

36V_IN

6

4

2

0

24V_IN

8V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 37 — Load Current vs. Ambient Temperature, 0 LFM

12

10

8

6

4

2

0

36V_IN

24V_IN

8V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 38 — Load Current vs. Ambient Temperature, 400 LFM

12

10

8

36V_IN

6

4

2

0

24V_IN

8V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 39 — Load Current vs. Ambient Temperature, 200 LFM

Cool-Power^®ZVS Switching Regulators

Page 23 of 42

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800 927.9474

PI33xx-x0

PI3303-x0-LGIZ (12.0V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN=24V, L1 = 230nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Input Speciﬁcations

[7]

Input Voltage

Input Current

V_{IN_DC}

I_{IN_DC}

17.4

24

36

20

V

A

V_IN= 24V, T_C= 25°C, I_OUT= 8A

4.15

Input Current At Output Short

(fault condition duty cycle)

[2]

I_{IN_Short}

mA

Disabled

2.0

2.5

mA

Input Quiescent Current

Input Voltage Slew Rate

I_{Q_VIN}

V_{IN_SR}

Enabled (no load)

1

V/μs

Output Speciﬁcations

[2]

Output Voltage Total Regulation

Output Voltage Trim Range

Line Regulation

V_{OUT_DC}

11.82

6.5

12.0

12

12.18

13.0

V

[3] [7]

∆V_OUT( ∆V_IN) @25°C, 8V <V_IN<36V

∆V_OUT(∆I_OUT) @25°C, 0.5A <I_OUT<8A

0.10

60

%

Load Regulation

%

Output Voltage Ripple

V_{OUT_AC}

I_{OUT_DC}

I_{OUT_CL}

I_OUT= 4A, C_OUT= 4 x 22μF, 20MHz BW ^[4]

mVp-p

Continuous Output

Current Range

[5]

8

A

Current Limit

9

Protection

V_INUVLO Start Threshold

V_INUVLO Stop Threshold

V_INUVLO Hysteresis

V_{UVLO_START}

V_{UVLO_STOP}

V_{UVLO_HYS}

V_{OVLO_START}

V_{OVLO_STOP}

V_{OVLO_HYS}

t_{f_DLY}

15.80

15.00

16.60

15.80

0.77

17.40

16.60

V

V_INOVLO Start Threshold

V_INOVLO Stop Threshold

V_INOVLO Hysteresis

37.0

36.1

38.4

V

0.77

128

500

20

V

V_INUVLO/OVLO Fault Delay Time

V_INUVLO/OVLO Response Time

Output Overvoltage Protection

Number of the switching freq cycles

Above V_OUT

Cycles

ns

%

t_f

V_OVP

Overtemperature

Fault Threshold

T_OTP

130

135

30

140

°C

Overtemperature

Restart Hysteresis

T_{OTP_HYS}

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

^[7]Minimum 5V between V_IN-V_OUTmust be maintained or a minimum load of 1mA required.

Cool-Power^®ZVS Switching Regulators

Page 24 of 42

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800 927.9474

PI33xx-x0

PI3303-x0-LGIZ (12.0V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN=24V, L1 = 230nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Timing

[6]

Switching Frequency

Fault Restart Delay

f_S

1.4

30

kHz

ms

t_{FR_DLY}

Sync In (SYNCI)

Synchronization Frequency

Range

∆f_SYNC

I

Relative to set switching frequency ^[3]

50

110

%

V

SYNCI Threshold

V_SYNCI

2.5

Sync Out (SYNCO)

Source 1mA

SYNCO High

V_{SYNCO_HI}

V_{SYNCO_LO}

t_{SYNCO_RT}

t_{SYNCO_FT}

4.5

V

SYNCO Low

Sink 1mA

0.5

SYNCO Rise Time

SYNCO Fall Time

20pF load

10

ns

20pF load

Soft Start And Tracking

TRK Active Input Range

TRK Max Output Voltage

TRK Disable Threshold

Charge Current (Soft – Start)

Discharge Current (Fault)

Soft-Start Time

V_TRK

0

1.04

V

1.2

40

V

V_{TRK_OV}

I_TRK

I_{TRK_DIS}

t_SS

20

60

mV

μA

mA

ms

-70

-50

6.8

2.2

-30

C_TRK= 0μF

Enable

High Threshold

V_{EN_HI}

V_{EN_LO}

V_{EN_HYS}

0.9

0.7

100

1

1.1

0.9

300

V

Low Threshold

0.8

200

Threshold Hysteresis

mV

Enable Pull-Up Voltage

(ﬂoating, unfaulted)

V_{EN_PU}

V_{EN_PD}

With positive logic EN polarity

With negative logic EN polarity

2

0

V

Enable Pull-Down Voltage

(ﬂoating, faulted)

Source Current

Sink Current

I_{EN_SO}

I_{EN_SK}

With positive logic EN polarity

With negative logic EN polarity

-50

50

μA

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

^[7]Minimum 5V between V_IN-V_OUTmust be maintained or a minimum load of 1mA required.

Cool-Power^®ZVS Switching Regulators

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800 927.9474

PI33xx-x0

PI3303-x0-LGIZ (12.0V_OUT) Electrical Characteristics

100

95

90

85

80

17.4V_IN

75

24V_IN

36V_IN

70

65

60

55

50

0

1

2

3

4

5

6

7

8

Load Curent (A)

Figure 43 — Transient Response 5A to 10A, at 5A/µs

Figure 40 — Efﬁciency at 25°C

Figure 41 — Short Circuit Test

Figure 44 — Output Ripple 24V_IN, 12.0V_OUTat 8A

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0

17.4V_IN

24V_IN

36V_IN

1

2

3

4

5

6

7

8

Load Curent (A)

Figure 42 — Switching Frequency vs. Load Current

Figure 45 — Output Ripple 24V_IN, 12.0V_OUTat 4A

Cool-Power^®ZVS Switching Regulators

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800 927.9474

PI33xx-x0

PI3303-x0-LGIZ (12.0V_OUT) Electrical Characteristics

9.0

8.0

7.0

6.0

36V_IN

24V_IN

5.0

4.0

3.0

2.0

1.0

0.0

18V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 46 — Load Current vs. Ambient Temperature, 0 LFM

9.0

8.0

7.0

6.0

5.0

4.0

3.0

2.0

1.0

0.0

36V_IN

24V_IN

18V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 47 — Load Current vs. Ambient Temperature, 400 LFM

9.0

8.0

7.0

6.0

36V_IN

24V_IN

18V_IN

5.0

4.0

3.0

2.0

1.0

0.0

50

75

100

125

Ambient Temperature (°C)

Figure 48 — Load Current vs. Ambient Temperature, 200 LFM

Cool-Power^®ZVS Switching Regulators

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800 927.9474

PI33xx-x0

PI3305-x0-LGIZ (15.0V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN=24V, L1 = 230nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Input Speciﬁcations

[7]

Input Voltage

Input Current

V_{IN_DC}

I_{IN_DC}

20.4

24

36

20

V

A

V_IN= 24V, T_C= 25°C, I_OUT= 8A

5.15

Input Current At Output Short

(fault condition duty cycle)

[2]

I_{IN_Short}

mA

Disabled

2.0

2.5

mA

Input Quiescent Current

Input Voltage Slew Rate

I_{Q_VIN}

V_{IN_SR}

Enabled (no load)

1

V/μs

Output Speciﬁcations

[2]

Output Voltage Total Regulation

Output Voltage Trim Range

Line Regulation

V_{OUT_DC}

14.78

10.0

15.0

15

15.23

16

V

[3] [7]

∆V_OUT( ∆V_IN) @25°C, 8V <V_IN<36V

∆V_OUT(∆I_OUT) @25°C, 0.5A <I_OUT<8A

0.1

60

%

Load Regulation

%

Output Voltage Ripple

V_{OUT_AC}

I_{OUT_DC}

I_{OUT_CL}

I_OUT= 4A, C_OUT= 4 x 22μF, 20MHz BW ^[4]

mVp-p

Continuous Output

Current Range

[5] [7]

8

A

Current Limit

9

Protection

V_INUVLO Start Threshold

V_INUVLO Stop Threshold

V_INUVLO Hysteresis

V_{UVLO_START}

V_{UVLO_STOP}

V_{UVLO_HYS}

V_{OVLO_START}

V_{OVLO_STOP}

V_{OVLO_HYS}

t_{f_DLY}

18.4

17.4

19.4

18.4

0.90

38.4

20.4

19.4

V

V_INOVLO Start Threshold

V_INOVLO Stop Threshold

V_INOVLO Hysteresis

37.0

36.1

V

0.77

128

500

20

V

V_INUVLO/OVLO Fault Delay Time

V_INUVLO/OVLO Response Time

Output Overvoltage Protection

Number of the switching freq cycles

Above V_OUT

Cycles

ns

%

t_f

V_OVP

Overtemperature

Fault Threshold

T_OTP

130

135

30

140

°C

Overtemperature

Restart Hysteresis

T_{OTP_HYS}

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

^[7]Minimum 5V between V_IN-V_OUTmust be maintained or a minimum load of 1mA required.

Cool-Power^®ZVS Switching Regulators

Page 28 of 42

Rev 2.2

08/2016

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800 927.9474

PI33xx-x0

PI3305-x0-LGIZ (15.0V_OUT) Electrical Characteristics

Unless otherwise speciﬁed: -40°C < T_J< 125°C, V_IN= 24V, L1 = 230nH ^[1]

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Timing

[6]

Switching Frequency

Fault Restart Delay

f_S

1.5

30

kHz

ms

t_{FR_DLY}

Sync In (SYNCI)

Synchronization Frequency

Range

∆f_SYNC

I

Relative to set switching frequency ^[3]

50

110

%

V

SYNCI Threshold

V_SYNCI

2.5

Sync Out (SYNCO)

Source 1mA

SYNCO High

V_{SYNCO_HI}

V_{SYNCO_LO}

t_{SYNCO_RT}

t_{SYNCO_FT}

4.5

V

SYNCO Low

Sink 1mA

0.5

SYNCO Rise Time

SYNCO Fall Time

20pF load

10

ns

20pF load

Soft Start And Tracking

TRK Active Input Range

TRK Max Output Voltage

TRK Disable Threshold

Charge Current (Soft – Start)

Discharge Current (Fault)

Soft-Start Time

V_TRK

0

1.04

V

1.2

40

V

V_{TRK_OV}

I_TRK

I_{TRK_DIS}

t_SS

20

60

mV

μA

mA

ms

-70

-50

6.8

2.2

-30

C_TRK= 0μF

Enable

High Threshold

V_{EN_HI}

V_{EN_LO}

V_{EN_HYS}

0.9

0.7

100

1

1.1

0.9

300

V

Low Threshold

0.8

200

Threshold Hysteresis

mV

Enable Pull-Up Voltage

(ﬂoating, unfaulted)

V_{EN_PU}

V_{EN_PD}

With positive logic EN polarity

With negative logic EN polarity

2

0

V

Enable Pull-Down Voltage

(ﬂoating, faulted)

Source Current

Sink Current

I_{EN_SO}

I_{EN_SK}

With positive logic EN polarity

With negative logic EN polarity

-50

50

μA

^[1]All parameters reﬂect regulator and inductor system performance. Measurements were made using a standard PI33xx-x0 evaluation board with 3x4”

dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for speciﬁc inductor manufacturer and value.

^[2]Regulator is assured to meet performance speciﬁcations by design, test correlation, characterization, and/or statistical process control.

^[3]Output current capability may be limited and other performance may vary from electrical characteristics when switching frequency or V_OUTis modiﬁed.

^[4]Refer to Output Ripple plots.

^[5]Refer to Load Current vs. Ambient Temperature curves.

^[6]Refer to Switching Frequency vs. Load current curves.

^[7]Minimum 5V between V_IN-V_OUTmust be maintained or a minimum load of 1mA required.

Cool-Power^®ZVS Switching Regulators

Page 29 of 42

Rev 2.2

08/2016

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800 927.9474

PI33xx-x0

PI3305-x0-LGIZ (15.0V_OUT) Electrical Characteristics

100

95

90

85

80

12V_IN

75

24V_IN

36V_IN

70

65

60

55

50

0

1

2

3

4

5

6

7

8

Load Curent (A)

Figure 52 — Transient Response 5A to 10A, at 5A/µs

Figure 49 — Efﬁciency at 25°C

Figure 50 — Short Circuit Test

Figure 53 — Output Ripple 24V_IN, 15.0V_OUTat 8A

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0

20.4V_IN

24V_IN

36V_IN

1

2

3

4

5

6

7

8

Load Curent (A)

Figure 51 — Switching Frequency vs. Load Current

Figure 54 — Output Ripple 24V_IN, 15.0V_OUTat 4A

Cool-Power^®ZVS Switching Regulators

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800 927.9474

PI33xx-x0

PI3305-x0-LGIZ (15.0V_OUT) Electrical Characteristics

9.0

8.0

7.0

6.0

36V_IN

24V_IN

5.0

4.0

3.0

2.0

1.0

0.0

21V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 55 — Load Current vs. Ambient Temperature, 0 LFM

9.0

8.0

7.0

6.0

5.0

4.0

3.0

2.0

1.0

0.0

36V_IN

24V_IN

21V_IN

50

75

100

125

Ambient Temperature (°C)

Figure 56 — Load Current vs. Ambient Temperature, 400 LFM

9.0

8.0

7.0

6.0

36V_IN

24V_IN

21V_IN

5.0

4.0

3.0

2.0

1.0

0.0

50

75

100

125

Ambient Temperature (°C)

Figure 57 — Load Current vs. Ambient Temperature, 200 LFM

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

Switching Frequency Synchronization

Functional Description

The SYNCI input allows the user to synchronize the controller

switching frequency by an external clock referenced to SGND.

The external clock can synchronize the unit between 50% and

110% of the preset switching frequency (fS). For PI33xx-20

device versions only, the phase delay can be programmed via I²C

bus with respect to the clock applied at SYNCI pin. Phase delay

allows PI33xx-20 regulators to be paralleled and operate in an

interleaving mode.

The PI33xx-x0 is a family of highly integrated ZVS-Buck regulators.

The PI33xx-x0 has a set output voltage that is trimmable within

a prescribed range shown in Table 1. Performance and maximum

output current are characterized with a speciﬁc external power

inductor (see Table 4).

The PI33xx-x0 default for SYNCI is to sync with respect to the

falling edge of the applied clock providing 180° phase shift from

SYNCO. This allows for the paralleling of two PI33xx-x0 devices

without the need for further user programming or external sync

clock circuitry. The user can change the SYNCI polarity to sync

with the external clock rising edge via the I²C data bus (PI33xx-20

device versions only).

L1

V_IN

VS1

V_OUT

V_IN

V_OUT

C_OUT

C_IN

PI33xx

PGND

REM

SYNCI

SYNCO

EN

TRK

ADJ

EAO

When using the internal oscillator, the SYNCO pin provides a

5V clock that can be used to sync other regulators. Therefore,

one PI33xx-x0 can act as the lead regulator and have additional

PI33xx-x0s running in parallel and interleaved.

Soft-Start

The PI33xx-x0 includes an internal soft-start capacitor to ramp the

output voltage in 2ms from 0V to full output voltage. Connecting

an external capacitor from the TRK pin to SGND will increase the

start-up ramp period. See, “Soft Start Adjustment and Track,” in

the Applications Description section for more details.

Figure 58 — ZVS-Buck with required components

For basic operation, Figure 58 shows the connections and compo-

nents required. No additional design or settings

are required.

Output Voltage Trim

The PI33xx-x0 output voltage can be trimmed up from the preset

output by connecting a resistor from ADJ pin to SGND and can be

trimmed down by connecting a resistor from ADJ pin to V_OUT. The

Table 1 deﬁnes the voltage ranges for the PI33xx-x0 family.

ENABLE (EN)

EN is the enable pin of the converter. The EN Pin is referenced

to SGND and permits the user to turn the regulator on or off.

The EN default polarity is a positive logic assertion. If the EN pin

is left ﬂoating or asserted high, the converter output is enabled.

Pulling EN pin below 0.8V_DCwith respect to SGND will disable the

regulator output.

Output Voltage

Device

Set

Range

The EN input polarity can be programmed (PI33xx-20 device

versions only) via the I²C data bus. When the EN pin polarity is

programmed for negative logic assertion; and if the EN pin is left

ﬂoating, the regulator output is enabled. Pulling the EN pin above

1.0V_DCwith respect to SGND, will disable the regulator output.

PI3311-x0-LGIZ

PI3318-x0-LGIZ

PI3312-x0-LGIZ

PI3301-x0-LGIZ

PI3302-x0-LGIZ

PI3303-x0-LGIZ

PI3305-x0-LGIZ

1.0V

1.8V

2.5V

3.3V

5.0V

12V

15V

1.0 to 1.4V

1.4 to 2.0V

2.0 to 3.1V

2.3 to 4.1V

3.3 to 6.5V

6.5 to 13.0V

10.0 to 16.0V

Remote Sensing

An internal 100 Ω resistor is connected between REM pin and

V_OUTpin to provide regulation when the REM connection is

broken. Referring to Figure 58, it is important to note that L1 and

C_OUTare the output ﬁlter and the local sense point for the power

supply output. As such, the REM pin should be connected at C_OUT

as the default local sense connection unless remote sensing to

compensate additional distribution losses in the system. The REM

pin should not be left ﬂoating.

Table 1 — PI33xx-x0 family output voltage range

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

Output Current Limit Protection

Overtemperature Protection

PI33xx-x0 has two methods implemented to protect from output

short or over current condition.

The internal package temperature is monitored to prevent internal

components from reaching their thermal maximum. If the Over

Temperature Protection Threshold (OTP) is exceeded (T_OTP), the

regulator will complete the current switching cycle, enter a low

power mode, set a fault ﬂag, and will soft-start when the internal

temperature falls below Overtemperature Restart Hysteresis

(T_{OTP_HYS}). The OTP fault is stored in a Fault Register and can be

read and cleared (PI33xx-20 device versions only) via I²C data bus.

Slow Current Limit protection: prevents the output load from

sourcing current higher than the regulator’s maximum rated

current. If the output current exceeds the Current Limit (I_{OUT_CL}

)

for 1024μs, a slow current limit fault is initiated and the regulator

is shutdown which eliminates output current ﬂow. After Fault

Restart Delay (t_{FR_DLY}), a soft-start cycle is initiated. This restart

cycle will be repeated indeﬁnitely until the excessive load

is removed.

Pulse Skip Mode (PSM)

PI33xx-x0 features a PSM to achieve high efﬁciency at light loads.

The regulators are setup to skip pulses if EAO falls below a PSM

threshold. Depending on conditions and component values, this

may result in single pulses or several consecutive pulses followed

by skipped pulses. Skipping cycles signiﬁcantly reduces gate drive

power and improves light load efﬁciency. The regulator will leave

PSM once the EAO rises above the Skip Mode threshold.

Fast Current Limit protection: PI33xx-x0 monitors the regulator

inductor current pulse-by-pulse to prevent the output from

supplying very high current due to sudden low impedance short

(50A Typical). If the regulator senses a high inductor current

pulse, it will initiate a fault and stop switching until Fault Restart

Delay ends and then initiate a soft-start cycle.

Both the Fast and Slow current limit faults are stored in a Fault

Register and can be read and cleared (PI33xx-20 device versions

only) via I²C data bus.

Variable Frequency Operation

Each PI33xx-x0 is preprogrammed to a base operating frequency,

with respect to the power stage inductor (see Table 4), to operate

at peak efﬁciency across line and load variations. At low line

and high load applications, the base frequency will decrease to

accommodate these extreme operating ranges. By stretching the

frequency, the ZVS operation is preserved throughout the total

input line voltage range therefore maintaining

Input Undervoltage Lockout

If V_INfalls below the input Undervoltage Lockout (UVLO)

threshold, but remains high enough to power the internal

bias supply, the PI33xx-x0 will complete the current cycle and

stop switching. If V_INrecovers within 128 switching cycles,

the PI33xx-x0 will resume normal operation. If this time limit

is exceeded, the system will enter a low power state and

initiate a fault.The system will restart once the input voltage is

reestablished and after the Fault Restart Delay. A UVLO fault is

stored in a Fault Register and can be read and cleared (PI33xx-20

device versions only) via I²C data bus.

optimum efﬁciency.

Parallel Operation

Paralleling modules can be used to increase the output current

capability of a single power rail and reduce output voltage ripple.

Input Overvoltage Lockout

L1

V_IN

VS1

V_OUT

If V_INexceeds the input Overvoltage Lockout (OVLO) threshold

(VOVLO), while the controller is running, the PI33xx-x0 will

complete the current cycle and stop switching. If V_INrecovers

within 128 switching cycles, the PI33xx-x0 will resume normal

operation. Otherwise, the system will enter a low power state

and sets an OVLO fault. The system will resume operation when

the input voltage falls below 98% of the OVLO threshold and

after the Fault Restart Delay. The OVLO fault is stored in a Fault

Register and can be read and cleared (PI33xx-20 device versions

only) via I²C data bus.

V_OUT

C_IN

C_OUT

PGND

PI33xx

(#1)

REM

PGD

SYNCI

SYNCO

EN

R1

SYNCO(#2)

SYNCI(#2)

EN(#2)

EAO(#2)

TRK(#2)

EAO

TRK

SGND

L1

V_IN

VS1

V_OUT

C_IN

C_OUT

Output Overvoltage Protection

PGND

PI33xx

(#2)

The PI33xx-x0 family is equipped with output Overvoltage

Protection (OVP) to prevent damage to input voltage sensitive

devices. If the output voltage exceeds 20% of its set regulated

value, the regulator will complete the current cycle, stop

switching and issue an OVP fault. The system will resume

operation once the output voltage falls below the OVP threshold

and after Fault Restart Delay. The OVP fault is stored in a Fault

Register and can be read and cleared (PI33xx-20 device versions

only) via I²C data bus.

PGD

REM

SYNCO(#1)

SYNCI

SYNCO

EN

SYNCI(#1)

EN(#1)

EAO(#1)

TRK(#1)

EAO

TRK

SGND

Figure 59 — PI33xx-x0 parallel operation

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The PI33xx-x0 default for SYNCI is to sync with respect to the

falling edge of the applied clock providing 180° phase shift from

SYNCO. This allows for the paralleling of two PI33xx-x0 devices

without the need for further user programming or external sync

clock circuitry. The user can change the SYNCI polarity to sync

with the external clock rising edge via the I²C data bus (PI33xx-20

device versions only).

Application Description

Output Voltage Trim

The PI33xx-x0 family of Buck Regulators provides seven common

output voltages: 1.0V, 1.8V, 2.5V, 3.3V, 5.0V, 12V and 15V. A

post-package trim step is implemented to offset any resistor

divider network errors ensuring maximum output accuracy. With

a single resistor connected from the ADJ pin to SGND or REM,

each device’s output can be varied above or below the nominal

set voltage (with the exception of the PI3311-X0 which can only

be above the set voltage of 1V).

By connecting the EAO pins and SGND pins of each module

together the units will share the current equally. When the TRK

pins of each unit are connected together, the units will track each

other during soft-start and all unit EN pins have to be released

to allow the units to start (See Figure 59). Also, any fault event in

any regulator will disable the other regulators. The two regulators

will be out of phase with each other reducing output ripple (refer

to Switching Frequency Synchronization).

Output Voltage

Device

Set

Range

To provide synchronization between regulators over the entire

operational frequency range, the Parallel Good (PGD) pin must be

connected to the lead regulator’s (#1) SYNCI pin and a

2.5kΩ Resistor, R1, must be placed between SYNCO (#2) return

and the lead regulator’s SYNCI (#1) pin, as shown in Figure 59. In

this conﬁguration, at system soft-start, the PGD pin pulls SYNCI

low forcing the lead regulator to initialize the open-loop startup

synchronization. Once the regulators reach regulation, SYNCI is

released and the system is now synchronized in a closed-loop

conﬁguration which allows the system to adjust, on the ﬂy, when

any of the individual regulators begin to enter variable frequency

mode in the loop.

PI3311-x0

PI3318-x0

PI3312-x0

PI3301-x0

PI3302-x0

PI3303-x0

PI3305-x0

1.0V

1.8V

2.5V

3.3V

5.0V

12V

15V

1.0 to 1.4V

1.4 to 2.0V

2.0 to 3.1V

2.3 to 4.1V

3.3 to 6.5V

6.5 to 13.0V

10.0 to 16.0V

Table 2 — PI33xx-x0 family output voltage range

Multi-phasing three regulators is possible (PI33xx-20 only) with

no change to the basic single-phase design. For more information

about how to program phase delays within the regulator, please

refer to Picor application note PI33xx-2x Multi-Phase

Design Guide.

The remote pin (REM) should always be connected to the V_OUT

pin, if not used, to prevent an output voltage offset. Figure 60

shows the internal feedback voltage divider network.

I²C Interface Operation

PI33xx-20 devices provide an I²C digital interface that enables the

user to program the EN pin polarity (from high to low assertion)

and switching frequency synchronization phase/delay. These are

one time programmable options to the device.

V_OUT

R4

REM

Also, the PI33xx-20 devices allow for dynamic V_OUTmargining via

I²C that is useful during development (settings stored in volatile

memory only and not retained by the device). The PI33xx-20 also

have the option for fault telemetry including:

R_low

R1

R2

ADJ

-

+

R_high

1.0 Vdc

ꢀnFast/Slow current limit

ꢀnOutput voltage high

ꢀnInput overvoltage

SGND

ꢀnInput undervoltage

Figure 60 — Internal resistor divider network

ꢀnOver temperature protection

R1, R2, and R4 are all internal 1.0% resistors and R_lowand R_high

are external resistors for which the designer can add to modify

V_OUTto a desired output. The internal resistor value for each

regulator is listed below in Table 3.

For more information about how to utilize the I²C interface please

refer to Picor application note PI33xx-2x I²C Digital

Interface Guide.

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

pin, the soft-start time can be increased further. The following

equation can be used to calculate the proper capacitor for a

desired soft-start times:

Device

R1

R2

R4

PI3311-x0-LGIZ

PI3318-x0-LGIZ

PI3312-x0-LGIZ

PI3301-x0-LGIZ

PI3302-x0-LGIZ

PI3303-x0-LGIZ

PI3305-x0-LGIZ

1 k

Open

1.0 k

1.13 k

1.0 k

100

0.806 k

1.5 k

C_TRK= (t_TRKx I_TRK) – 100 x 10 ^-9,

2.61 k

4.53 k

11.0 k

14.0 k

Where, t_TRKis the soft-start time and I_TRKis a 50μA internal

charge current (see Electrical Characteristics for limits).

There is typically either proportional or direct tracking

Table 3 — PI33xx-x0 Internal divider values

implemented within a design. For proportional tracking between

several regulators at startup, simply connect all devices TRK pins

together. This type of tracking will force all connected regulators

to startup and reach regulation at the same time (see Figure 61(a).

By choosing an output voltage value within the ranges stated in

Table 2, V_OUTcan simply be adjusted up or down by selecting the

proper R_highor R_lowvalue, respectively. The following equations

can be used to calculate R_highand R_lowvalues:

V_OUT

1

V

_OUT2

(a)

Master V_OUT

V_OUT

2

(b)

If, for example, a 4.0V output is needed, the user should choose

the regulator with a trim range covering 4.0V from Table 2. For

this example, the PI3301 is selected (3.3V set voltage). First step

would be to use Equation (1) to calculate Rhigh since the required

output voltage is higher than the regulator set voltage. The

resistor-divider network values for the PI3301 are can be found

in Table 3 and are R1 = 2.61kΩ and R2 = 1.13kΩ. Inserting these

values in to Equation (1), R_highis calculated as follows:

+

Figure 61 — PI33xx-x0 tracking methods

For Direct Tracking, choose the regulator with the highest output

voltage as the master and connect the master to the TRK pin of

the other regulators through a divider (Figure 62) with the same

ratio as the slave’s feedback divider (see Table 3 for values).

Master V_OUT

Resistor R_high should be connected as shown in Figure 60 to

achieve the desired 4.0V regulator output. No external R_low

resistor is need in this design example since the trim is above the

regulator set voltage.

R1

PI33xx

The PI3420 output voltage can only be trimmed higher than

the factory 1V setting. The following Equation (3) can be used

calculate Rhigh values for the PI3420 regulators.

TRK

Slave

R2

1

!

=

ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ(3)ꢀꢀꢀ

!!"!(!!)

SGND

!"#$ − 1

!1

Figure 62 — Voltage divider connections for direct tracking

Soft-Start Adjust and Tracking

All connected regulators’ soft-start slopes will track with this

method. Direct tracking timing is demonstrated in Figure 61(b). All

tracking regulators should have their Enable (EN) pins connected

together to work properly.

The TRK pin offers a means to increase the regulator’s soft-start

time or to track with additional regulators. The soft-start slope

is controlled by an internal 100nF and a ﬁxed charge current to

provide a minimum startup time of 2ms (typical) for all PI33xx-x0

regulators. By adding an additional external capacitor to the TRK

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

Inductor Pairing

either the MOSFETs or inductor depending upon line and load

conditions.

The PI33xx-x0 utilizes an external inductor. This inductor has been

optimized for maximum efﬁciency performance. Table 4 details

the speciﬁc inductor value and part number utilized for each

PI33xx-x0 device which are available from Coiltronics and Eaton.

Data sheets are available at:

Thermal measurements were made using a standard

PI33xx-x0 Evaluation board which is 3 x 4 inches in area and uses

4-layer, 2oz copper. Thermal measurements were made on the

three main power devices, the two internal MOSFETs and the

external inductor, with air ﬂows of 0, 200, and 400 LFM.

http://www.cooperindustries.com

Filter Considerations

Inductor

[nH]

Inductor

Part Number

The PI33xx-x0 requires input bulk storage capacitance as well as

low impedance ceramic X5R input capacitors to ensure proper

start up and high frequency decoupling for the power stage. The

PI33xx-x0 will draw nearly all of the high frequency current from

the low impedance ceramic capacitors when the main high side

MOSFET is conducting. During the time the high side MOSFET

is off, they are replenished from the bulk capacitor. If the input

impedance is high at the switching frequency of the converter,

the bulk capacitor must supply all of the average current into

the converter, including replenishing the ceramic capacitors. This

value has been chosen to be 100μF so that the PI33xx-x0 can

start up into a full resistive load and supply the output capacitive

load with the default minimum soft start capacitor when the

input source impedance is 50Ohms at 1MHz. The ESR for this

capacitor should be approximately 20mΩ. The RMS ripple current

in this capacitor is small, so it should not be a concern if the input

recommended ceramic capacitors are used. Table 5 shows the

recommended input and output capacitors to be used for the

various models as well as expected transient response, RMS ripple

currents per capacitor, and input and output ripple voltages. Table

6 includes the recommended input and output

Device

Manufacturer

PI3311-x0

PI3318-x0

PI3312-x0

PI3301-x0

PI3302-x0

PI3303-x0

PI3305-x0

125

150

200

230

FPV1006-125-R

FPV1006-150-R

FPT705-200-R

FPT705-230-R

Eaton

Coiltronics

Table 4 — PI33xx-x0 Inductor pairing

Thermal Derating

Thermal de-rating curves are provided that are based on

component temperature changes versus load current, input

voltage and air ﬂow. It is recommended to use these curves as a

guideline for proper thermal de-rating. These curves represent

the entire system and are inclusive to both the Picor regulator and

the external inductor. Maximum thermal operation is limited by

ceramic capacitors.

C_INPUT

Ripple

Current Current

C_OUTPUT

Ripple

Load

Step

(A)

C_INPUT

Ceramic

X5R

C_INPUT

Bulk

Elec.

C_OUTPUT

Ceramic

X5R

Input

Ripple

(mVpp)

Output

Ripple

(mVpp)

Output Recovery

V_IN

(V)

I_LOAD

(A)

Device

Ripple

Time

(µs)

(mVpp)

(I_RMS

)

(I_RMS

)

(Slew/µs)

10

5

120

100

120

100

150

100

200

125

220

140

275

150

280

160

20

15

20

15

50

24

40

33

50

30

100

60

150

75

8 X 100μF

2 X 1μF

1 X 0.1μF

4 x 4.7μF

50V

100μF

50V

5

PI3311

PI3318

PI3312

PI3301

PI3302

PI3303

PI3305

24

0.5

0.8

-/+40

40

25

20

30

(5A/μs)

10

5

6 X 100μF

2 X 1μF

1 X 0.1μF

4 x 4.7μF

50

100μF

50V

5

0.5

1

0.8

(5A/μs)

10

5

4 X 100μF

2 X 1μF

1 X 0.1μF

100μF

50V

5

4 x 4.7μF

1.75

1.625

1.5

-/+80

(10A/μs)

10

5

4 X 100μF

2 X 1μF

1 X 0.1μF

100μF

50V

5

1.05

1.2

-/+100

-/+170

-/+300

-/+400

(10A/μs)

10

5

4 X 47μF

2 X 1μF

1 X 0.1μF

100μF

50V

5

(5A/μs)

8

4 X 22μF

2 X 1μF

1 X 0.1μF

100μF

50V

4

1.3

1.36

1.2

(10A/μs)

4

8

4 X 22μF

2 X 1μF

1 X 0.1μF

100μF

50V

4

1.38

(10A/μs)

4

Table 5 — Recommended input and output capacitance

Cool-Power^®ZVS Switching Regulators

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When Q1 is on and Q2 is off, the majority of C_IN’scurrent is used

to satisfy the output load and to recharge the C_OUTcapacitors.

When Q1 is off and Q2 is on, the load current is supplied by the

inductor and the C_OUTcapacitor as shown in Figure 65. During

this period C_INis also being recharged by the V_IN. Minimizing C_IN

loop inductance is important to reduce peak voltage excursions

when Q1 turns off. Also, the difference in area between the C_IN

loop and C_OUTloop is vital to minimize switching and GND noise.

Murata Part Number

GRM188R71C105KA12D

GRM319R71H104KA01D

GRM31CR60J107ME39L

GRM31CR71H475KA12K

GRM31CR61A476ME15L

GRM31CR61E226KE15L

Description

1μF 16V 0603 X7R

0.1μF 50V 1206 X7R

100μF 6.3V 1206 X5R

4.7μF 50V 1206 X7R

47μF 10V 1206 X5R

22μF 25V 1206 X5R

Table 6 — Capacitor manufacturer part numbers

Layout Guidelines

V_IN

C_IN

To optimize maximum efﬁciency and low noise performance from

a PI33xx-x0 design, layout considerations are necessary. Reducing

trace resistance and minimizing high current loop returns along

with proper component placement will contribute to

optimized performance.

C_OUT

A typical buck converter circuit is shown in Figure 63. The

potential areas of high parasitic inductance and resistance are the

circuit return paths, shown as LR below.

Figure 65 — Current ﬂow: Q2 closed

The recommended component placement, shown in Figure 66,

illustrates the tight path between C_INand C_OUT(and V_INand V_OUT

for the high AC return current. This optimized layout is used on

the PI33xx-x0 evaluation board.

)

V_IN

C_IN

C_OUT

V_OUT

Figure 63 — Typical Buck Converter

C_OUT

The path between the C_OUTand C_INcapacitors is of particular

importance since the AC currents are ﬂowing through both of

them when Q1 is turned on.

GND

C_IN

Figure 64, schematically, shows the reduced trace length between

input and output capacitors. The shorter path lessens the effects

that copper trace parasitics can have on the

VSW

V_IN

PI33xx-x0 performance.

GND

V_IN

C_IN

Figure 66 — Recommended component placement and

metal routing

Figure 67 details the recommended receiving footprint for

PI33xx-x0 10mm x 14mm package. All pads should have a ﬁnal

copper size of 0.55mm x 0.55mm, whether they are solder-mask

deﬁned or copper deﬁned, on a 1mm x 1mm grid. All stencil

openings are 0.45mm when using either a 5mil or 6mil stencil.

C_OUT

Figure 64 — Current ﬂow: Q1 closed

Cool-Power^®ZVS Switching Regulators

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Recommended PCB Footprint and Stencil

Figure 67 — Recommended Receiving PCB footprint

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

LGIZ Package Drawing

DIMESIONAL REFERENCES

REF.

A

A1

A2

b

MIN

2.50

NOM

2.56

MAX

2.62

0.05

2.57

0.60

0.50

0.55

L

14.00 BSC

10.00 BSC

13.00 BSC

9.00 BSC

1.00 BSC

D

E

D1

E1

e

L1

0.10

0.15

0.20

0.10

0.08

0.10

0.08

aaa

bbb

ccc

ddd

eee

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

BGIZ Package Drawing

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

Revision History

Revision

1.5

Date

06/13

Description

Page Number(s)

Last release in old format

n/a

1.6

08/03/15

Reformatted in new template

Formatting edits

6, 21, 22, 25, 26,

29, 30 & 36

1.7

1.8

1.9

08/21/15

09/18/15

01/06/16

Formatting edits

all

Clariﬁcations made in Enable Pin Conditions

BGA package added

7, 18, 22, 26 & 30

1, 3, 20–23, 34 & 40

2.0

2.1

02/22/16

05/27/16

Corrected Input Current spec unit of measure from mA to A

Revised Output Voltage Total Regulation

12, 16, 20, 24 & 28

12

7, 9, 10, 12, 13, 16, 17,

20, 21, 24, 25, 28 & 29

2.2

08/22/16

Corrected typo in temp range for Electrical Characteristics tables

Cool-Power^®ZVS Switching Regulators

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PI33xx-x0

Vicor’s comprehensive line of power solutions includes high density AC-DC and DC-DC modules and

accessory components, fully conﬁgurable AC-DC and DC-DC power supplies, and complete custom

power systems.

Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its use. Vicor makes no

representations or warranties with respect to the accuracy or completeness of the contents of this publication. Vicor reserves the right to make

changes to any products, speciﬁcations, and product descriptions at any time without notice. Information published by Vicor has been checked and

is believed to be accurate at the time it was printed; however, Vicor assumes no responsibility for inaccuracies. Testing and other quality controls

are used to the extent Vicor deems necessary to support Vicor’s product warranty. Except where mandated by government requirements, testing of

all parameters of each product is not necessarily performed.

Speciﬁcations are subject to change without notice.

Vicor’s Standard Terms and Conditions

All sales are subject to Vicor’s Standard Terms and Conditions of Sale, which are available on Vicor’s webpage or upon request.

Product Warranty

In Vicor’s standard terms and conditions of sale, Vicor warrants that its products are free from non-conformity to its Standard Speciﬁcations (the

“Express Limited Warranty”). This warranty is extended only to the original Buyer for the period expiring two (2) years after the date of shipment

and is not transferable.

UNLESS OTHERWISE EXPRESSLY STATED IN A WRITTEN SALES AGREEMENT SIGNED BY A DULY AUTHORIZED VICOR SIGNATORY, VICOR

DISCLAIMS ALL REPRESENTATIONS, LIABILITIES, AND WARRANTIES OF ANY KIND (WHETHER ARISING BY IMPLICATION OR BY OPERATION OF LAW)

WITH RESPECT TO THE PRODUCTS, INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR REPRESENTATIONS AS TO MERCHANTABILITY,

FITNESS FOR PARTICULAR PURPOSE, INFRINGEMENT OF ANY PATENT, COPYRIGHT, OR OTHER INTELLECTUAL PROPERTY RIGHT, OR ANY OTHER

MATTER.

This warranty does not extend to products subjected to misuse, accident, or improper application, maintenance, or storage. Vicor shall not be liable

for collateral or consequential damage. Vicor disclaims any and all liability arising out of the application or use of any product or circuit and assumes

no liability for applications assistance or buyer product design. Buyers are responsible for their products and applications using Vicor products

and components. Prior to using or distributing any products that include Vicor components, buyers should provide adequate design, testing and

operating safeguards.

Vicor will repair or replace defective products in accordance with its own best judgment. For service under this warranty, the buyer must contact

Vicor to obtain a Return Material Authorization (RMA) number and shipping instructions. Products returned without prior authorization will be

returned to the buyer. The buyer will pay all charges incurred in returning the product to the factory. Vicor will pay all reshipment charges if the

product was defective within the terms of this warranty.

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VICOR’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS

PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL COUNSEL OF VICOR CORPORATION. As used herein, life support

devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and whose failure to perform

when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a signiﬁcant injury to the

user. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the

failure of the life support device or system or to affect its safety or effectiveness. Per Vicor Terms and Conditions of Sale, the user of Vicor products

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products described in this data sheet. No license, whether express, implied, or arising by estoppel or otherwise, to any intellectual property rights is

granted by this document. Interested parties should contact Vicor’s Intellectual Property Department.

The products described on this data sheet are protected by the following U.S. Patents Numbers:

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RE 40,072

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Picor Corporation

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email

Customer Service: custserv@vicorpower.com

Technical Support: apps@vicorpower.com

Cool-Power^®ZVS Switching Regulators

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型号：	PI3301-20-LGIZ
厂家：	VICOR CORPORATION
描述：	8V to 36VIN Cool-Power ZVS Buck Regulator Family 开关
文件：	总42页 (文件大小：2608K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PI3301-20-LGIZ [VICOR]

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