PI3302-00-LGIZ [VICOR]
8V to 36VIN Cool-Power ZVS Buck Regulator Family;型号: | PI3302-00-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 |
Cool-Power®
ZVS Switching Regulators
PI33xx-x0
8V to 36VIN Cool-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
IOUT Max
Set
Range
• -40°C to 125°C operating range (TJ)
• Optional I2C functionality & programmability:
ꢀnVOUT margining
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
10A
10A
10A
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 36VIN.
• 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
Page 1 of 42
Rev 2.2
08/2016
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PI33xx-x0
Contents
Contents
Page
3
Contents
Page
34
34
35
36
36
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
4
Pin Description
5
Package Pin-Out
5
Thermal Derating
PI3311-x0 (1.0 VOUT) Electrical Characteristics
PI3318-x0 (1.8 VOUT) Electrical Characteristics
PI3312-x0 (2.5 VOUT) Electrical Characteristics
PI3301-x0 (3.3 VOUT) Electrical Characteristics
PI3302-x0 (5.0 VOUT) Electrical Characteristics
PI3303-x0 (12.0 VOUT) Electrical Characteristics
PI3305-x0 (15.0 VOUT) Electrical Characteristics
Functional Description
6
Filter Considerations
Layout Guidelines
9
12
16
20
24
28
32
32
32
32
32
32
33
33
33
33
33
33
33
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
Cool-Power® ZVS Switching Regulators
Page 2 of 42
Rev 2.2
08/2016
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800 927.9474
PI33xx-x0
Order Information
Output Range
Transport
Media
Cool-Power
IOUT Max
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
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
3.3 to 6.5V
6.5 to 13.0V
10.0 to 16.0V
10A
10A
10A
10A
10A
10A
8A
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10.5mm x 14.5mm BGA
TRAY
TRAY
TRAY
TRAY
TRAY
TRAY
TRAY
TRAY
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
15V
8A
I2C Functionality & Programmability
Output Range
Transport
Media
Cool-Power
IOUT Max
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
10A
10A
10 A
10A
8A
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
10mm x 14mm 123-pin LGA
TRAY
TRAY
TRAY
TRAY
TRAY
TRAY
TRAY
15V
8A
Cool-Power® ZVS Switching Regulators
Page 3 of 42
Rev 2.2
08/2016
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800 927.9474
PI33xx-x0
Absolute Maximum Ratings
Name
VIN
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
VOUT
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
Page 4 of 42
Rev 2.2
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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
VIN
Block 2
Block 3
Block 5
Block 4
A1
Power Ground: VIN and VOUT power 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.
VOUT
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 VOUT
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.
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
Page 5 of 42
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08/2016
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PI33xx-x0
PI3311-x0-LGIZ (1.0VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN =24V, L1 = 125nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Input Specifications
Minimum 1mA load required
VIN = 24V, TC = 25°C, IOUT =10A
Input Voltage
Input Current
VIN_DC
IIN_DC
8
24
36
20
V
476
mA
Input Current At Output Short
(fault condition duty cycle)
[2]
IIN_Short
mA
Disabled
2.0
2.5
mA
mA
Input Quiescent Current
Input Voltage Slew Rate
IQ_VIN
VIN_SR
Enabled (no load)
1
V/μs
Output Specifications
[2]
Output Voltage Total Regulation
Output Voltage Trim Range
Line Regulation
VOUT_DC
VOUT_DC
0.987
1.0
1.0
1.013
1.4
V
V
[3]
∆VOUT ( ∆VIN) @25°C, 8V <VIN <36V
0.10
0.10
20
%
Load Regulation
∆VOUT (∆IOUT) @25°C, 0.5A <IOUT <10A
%
Output Voltage Ripple
VOUT_AC
IOUT_DC
IOUT_CL
IOUT = 5A, COUT = 8 x 100μF, 20MHz BW [4]
mVp-p
Continuous Output
Current Range
[5] Min 1mA load required
10
A
A
Current Limit
12
Protection
VIN UVLO Start Threshold
VIN UVLO Stop Threshold
VIN UVLO Hysteresis
VUVLO_START
VUVLO_STOP
VUVLO_HYS
VOVLO_START
VOVLO_STOP
VOVLO_HYS
tf_DLY
7.10
6.80
7.60
7.25
0.33
38.4
8.00
7.60
V
V
V
VIN OVLO Start Threshold
VIN OVLO Stop Threshold
VIN OVLO Hysteresis
37.0
36.1
V
V
0.77
128
500
20
V
VIN UVLO/OVLO Fault Delay Time
VIN UVLO/OVLO Response Time
Output Overvoltage Protection
Number of the switching freq cycles
Above VOUT
Cycles
ns
%
tf
VOVP
Overtemperature
Fault Threshold
TOTP
130
135
30
140
°C
°C
Overtemperature
Restart Hysteresis
TOTP_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 VOUT is 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
Page 6 of 42
Rev 2.2
08/2016
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PI33xx-x0
PI3311-x0-LGIZ (1.0VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN =24V, L1 = 125nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Timing
[6]
Switching Frequency
Fault Restart Delay
fS
500
30
kHz
ms
tFR_DLY
Sync In (SYNCI)
Synchronization Frequency
Range
∆fSYNC
I
Relative to set switching frequency [3]
50
110
%
V
SYNCI Threshold
VSYNCI
2.5
Sync Out (SYNCO)
Source 1mA
SYNCO High
VSYNCO_HI
VSYNCO_LO
tSYNCO_RT
tSYNCO_FT
4.5
V
V
SYNCO Low
Sink 1mA
0.5
SYNCO Rise Time
SYNCO Fall Time
20pF load
10
10
ns
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
VTRK
Internal reference tracking range
0
1.04
V
1.2
40
V
VTRK_OV
ITRK
ITRK_DIS
tSS
20
60
mV
μA
mA
ms
-70
-50
6.8
2.2
-30
CTRK = 0μF
Enable
High Threshold
VEN_HI
VEN_LO
VEN_HYS
0.9
0.7
100
1
1.1
0.9
300
V
V
Low Threshold
0.8
200
Threshold Hysteresis
mV
Enable Pull-Up Voltage
(floating, unfaulted)
VEN_PU
VEN_PD
With positive logic EN polarity
With negative logic EN polarity
2
0
V
V
Enable Pull-Down Voltage
(floating, faulted)
Source Current
Sink Current
IEN_SO
IEN_SK
With positive logic EN polarity
With negative logic EN polarity
-50
50
μA
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 VOUT is 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
Page 7 of 42
Rev 2.2
08/2016
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800 927.9474
PI33xx-x0
PI3311-x0-LGIZ (1.0VOUT) Electrical Characteristics
100
95
90
85
80
75
12VIN
24VIN
36VIN
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 24VIN, 1.0VOUT at 10A
600
500
400
300
12VIN
24VIN
36VIN
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 24VIN, 1.0VOUT at 5A
Cool-Power® ZVS Switching Regulators
Page 8 of 42
Rev 2.2
08/2016
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800 927.9474
PI33xx-x0
PI3318-x0-LGIZ (1.8VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN =24V, L1 = 155nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Input Specifications
Minimum 1mA load required
VIN = 24V, TC = 25°C, IOUT =10A
Input Voltage
Input Current
VIN_DC
IIN_DC
8
24
36
20
V
835
mA
Input Current At Output Short
(fault condition duty cycle)
[2]
IIN_Short
mA
Disabled
2.0
2.5
mA
mA
Input Quiescent Current
Input Voltage Slew Rate
IQ_VIN
VIN_SR
Enabled (no load)
1
V/μs
Output Specifications
[2]
Output Voltage Total Regulation
Output Voltage Trim Range
Line Regulation
VOUT_DC
VOUT_DC
1.773
1.4
1.8
1.827
2.0
V
V
[3]
∆VOUT ( ∆VIN) @25°C, 8V <VIN <36V
∆VOUT (∆IOUT) @25°C, 0.5A <IOUT <10A
0.10
0.10
25
%
Load Regulation
%
Output Voltage Ripple
VOUT_AC
IOUT_DC
IOUT_CL
IOUT = 5A, COUT = 6 x 100μF, 20MHz BW [4]
mVp-p
Continuous Output
Current Range
[5]
10
A
A
Current Limit
12
Protection
VIN UVLO Start Threshold
VIN UVLO Stop Threshold
VIN UVLO Hysteresis
VUVLO_START
VUVLO_STOP
VUVLO_HYS
VOVLO_START
VOVLO_STOP
VOVLO_HYS
tf_DLY
7.10
6.80
7.60
7.25
0.33
38.4
8.00
7.60
V
V
V
VIN OVLO Start Threshold
VIN OVLO Stop Threshold
VIN OVLO Hysteresis
37.0
36.1
V
V
0.77
128
500
20
V
VIN UVLO/OVLO Fault Delay Time
VIN UVLO/OVLO Response Time
Output Overvoltage Protection
Number of the switching freq cycles
Above VOUT
Cycles
ns
%
tf
VOVP
Overtemperature
Fault Threshold
TOTP
130
135
30
140
°C
°C
Overtemperature
Restart Hysteresis
TOTP_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 VOUT is 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
Page 9 of 42
Rev 2.2
08/2016
vicorpower.com
800 927.9474
PI33xx-x0
PI3318-x0-LGIZ (1.8VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN =24V, L1 = 155nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Timing
[6]
Switching Frequency
Fault Restart Delay
fS
600
30
kHz
ms
tFR_DLY
Sync In (SYNCI)
Synchronization Frequency
Range
∆fSYNC
I
Relative to set switching frequency [3]
50
110
%
V
SYNCI Threshold
VSYNCI
2.5
Sync Out (SYNCO)
Source 1mA
SYNCO High
VSYNCO_HI
VSYNCO_LO
tSYNCO_RT
tSYNCO_FT
4.5
V
V
SYNCO Low
Sink 1mA
0.5
SYNCO Rise Time
SYNCO Fall Time
20pF load
10
10
ns
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
VTRK
Internal reference tracking range
0
1.04
V
1.2
40
V
VTRK_OV
ITRK
ITRK_DIS
tSS
20
60
mV
μA
mA
ms
-70
-50
6.8
2.2
-30
CTRK = 0μF
Enable
High Threshold
VEN_HI
VEN_LO
VEN_HYS
0.9
0.7
100
1
1.1
0.9
300
V
V
Low Threshold
0.8
200
Threshold Hysteresis
mV
Enable Pull-Up Voltage
(floating, unfaulted)
VEN_PU
VEN_PD
With positive logic EN polarity
With negative logic EN polarity
2
0
V
V
Enable Pull-Down Voltage
(floating, faulted)
Source Current
Sink Current
IEN_SO
IEN_SK
With positive logic EN polarity
With negative logic EN polarity
-50
50
μA
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 VOUT is 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
Page 10 of 42
Rev 2.2
08/2016
vicorpower.com
800 927.9474
PI33xx-x0
PI3318-x0-LGIZ (1.8VOUT) Electrical Characteristics
100
95
90
85
8VIN
80
75
12VIN
24VIN
36VIN
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 24VIN, 1.8VOUT at 10A
700
600
500
400
300
8VIN
12VIN
24VIN
36VIN
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 24VIN, 1.8VOUT at 5A
Cool-Power® ZVS Switching Regulators
Page 11 of 42
Rev 2.2
08/2016
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800 927.9474
PI33xx-x0
PI3312-x0-LGIZ (2.5VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 200nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Input Specifications
[7]
Input Voltage
Input Current
VIN_DC
IIN_DC
8
24
36
20
V
A
VIN = 24V, TC = 25°C, IOUT = 10A
1.14
Input Current At Output Short
(fault condition duty cycle)
[2]
IIN_Short
mA
Disabled
2.0
2.5
mA
mA
Input Quiescent Current
Input Voltage Slew Rate
IQ_VIN
VIN_SR
Enabled (no load)
1
V/μs
Output Specifications
[2]
Output Voltage Total Regulation
Output Voltage Trim Range
Line Regulation
VOUT_DC
VOUT_DC
2.465
2.0
2.500
2.5
2.535
3.1
V
V
[3] [7]
∆VOUT ( ∆VIN) @25°C, 8V <VIN <36V
∆VOUT (∆IOUT) @25°C, 0.5A <IOUT <10A
0.10
0.10
28
%
Load Regulation
%
Output Voltage Ripple
VOUT_AC
IOUT_DC
IOUT_CL
IOUT = 5A, COUT = 4 x 100μF, 20MHz BW [4]
mVp-p
Continuous Output
Current Range
[5] [7]
10
A
A
Current Limit
12
Protection
VIN UVLO Start Threshold
VIN UVLO Stop Threshold
VIN UVLO Hysteresis
VUVLO_START
VUVLO_STOP
VUVLO_HYS
VOVLO_START
VOVLO_STOP
VOVLO_HYS
tf_DLY
7.10
6.80
7.60
7.25
0.33
38.4
8.00
7.60
V
V
V
VIN OVLO Start Threshold
VIN OVLO Stop Threshold
VIN OVLO Hysteresis
37.0
36.1
V
V
0.77
128
500
20
V
VIN UVLO/OVLO Fault Delay Time
VIN UVLO/OVLO Response Time
Output Overvoltage Protection
Number of the switching freq cycles
Above VOUT
Cycles
ns
%
tf
VOVP
Overtemperature
Fault Threshold
TOTP
130
135
30
140
°C
°C
Overtemperature
Restart Hysteresis
TOTP_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 VOUT is 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 VIN-VOUT must be maintained or a minimum load of 1mA required.
Cool-Power® ZVS Switching Regulators
Page 12 of 42
Rev 2.2
08/2016
vicorpower.com
800 927.9474
PI33xx-x0
PI3312-x0-LGIZ (2.5VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 200nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Timing
[6]
Switching Frequency
Fault Restart Delay
fS
500
30
kHz
ms
tFR_DLY
Sync In (SYNCI)
Synchronization Frequency
Range
∆fSYNC
I
Relative to set switching frequency [3]
50
110
%
V
SYNCI Threshold
VSYNCI
2.5
Sync Out (SYNCO)
Source 1mA
SYNCO High
VSYNCO_HI
VSYNCO_LO
tSYNCO_RT
tSYNCO_FT
4.5
V
V
SYNCO Low
Sink 1mA
0.5
SYNCO Rise Time
SYNCO Fall Time
20pF load
10
10
ns
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
VTRK
Internal reference tracking range
0
1.04
V
1.2
40
V
VTRK_OV
ITRK
ITRK_DIS
tSS
20
60
mV
μA
mA
ms
-70
-50
6.8
2.2
-30
CTRK = 0μF
Enable
High Threshold
VEN_HI
VEN_LO
VEN_HYS
0.9
0.7
100
1
1.1
0.9
300
V
V
Low Threshold
0.8
200
Threshold Hysteresis
mV
Enable Pull-Up Voltage
(floating, unfaulted)
VEN_PU
VEN_PD
With positive logic EN polarity
With negative logic EN polarity
2
0
V
V
Enable Pull-Down Voltage
(floating, faulted)
Source Current
Sink Current
IEN_SO
IEN_SK
With positive logic EN polarity
With negative logic EN polarity
-50
50
μA
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 VOUT is 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 VIN-VOUT must be maintained or a minimum load of 1mA required.
Cool-Power® ZVS Switching Regulators
Page 13 of 42
Rev 2.2
08/2016
vicorpower.com
800 927.9474
PI33xx-x0
PI3312-x0-LGIZ (2.5VOUT) Electrical Characteristics
95
90
85
80
12VIN
75
24VIN
36VIN
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 24VIN, 2.5VOUT at 10A
600
500
400
300
12VIN
24VIN
36VIN
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 24VIN, 2.5VOUT at 5A
Cool-Power® ZVS Switching Regulators
Page 14 of 42
Rev 2.2
08/2016
vicorpower.com
800 927.9474
PI33xx-x0
PI3312-x0-LGIZ (2.5VOUT) Electrical Characteristics
12
10
8
36VIN
6
4
2
0
24VIN
8VIN
50
75
100
125
Ambient Temperature (°C)
Figure 19 — Load Current vs. Ambient Temperature, 0 LFM
12
10
8
6
4
2
0
36VIN
24VIN
8VIN
50
75
100
125
Ambient Temperature (°C)
Figure 20 — Load Current vs. Ambient Temperature, 400 LFM
12
10
8
36VIN
6
4
2
0
24VIN
8VIN
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
vicorpower.com
800 927.9474
PI33xx-x0
PI3301-x0-LGIZ (3.3VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN =24V, L1 = 200nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Input Specifications
[7]
Input Voltage
Input Current
VIN_DC
IIN_DC
8
24
36
20
V
A
VIN = 24V, TC = 25°C, IOUT =10A
1.49
Input Current At Output Short
(fault condition duty cycle)
[2]
IIN_Short
mA
Disabled
2.0
2.5
mA
mA
Input Quiescent Current
Input Voltage Slew Rate
IQ_VIN
VIN_SR
Enabled (no load)
1
V/μs
Output Specifications
[2]
Output Voltage Total Regulation
Output Voltage Trim Range
Line Regulation
VOUT_DC
VOUT_DC
3.25
2.3
3.30
3.3
3.36
4.1
V
V
[3] [7]
∆VOUT ( ∆VIN) @25°C, 8V <VIN <36V
∆VOUT (∆IOUT) @25°C, 0.5A <IOUT <10A
0.10
0.10
37.5
%
Load Regulation
%
Output Voltage Ripple
VOUT_AC
IOUT_DC
IOUT_CL
IOUT = 5A, COUT = 4 x 100μF, 20MHz BW [4]
mVp-p
Continuous Output
Current Range
10
A
A
Current Limit
12
Protection
VIN UVLO Start Threshold
VIN UVLO Stop Threshold
VIN UVLO Hysteresis
VUVLO_START
VUVLO_STOP
VUVLO_HYS
VOVLO_START
VOVLO_STOP
VOVLO_HYS
tf_DLY
7.10
6.80
7.60
7.25
0.33
38.4
8.00
7.60
V
V
V
VIN OVLO Start Threshold
VIN OVLO Stop Threshold
VIN OVLO Hysteresis
37.0
36.1
V
V
0.77
128
500
20
V
VIN UVLO/OVLO Fault Delay Time
VIN UVLO/OVLO Response Time
Output Overvoltage Protection
Number of the switching freq cycles
Above VOUT
Cycles
ns
%
tf
VOVP
Overtemperature
Fault Threshold
TOTP
130
135
30
140
°C
°C
Overtemperature
Restart Hysteresis
TOTP_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 VOUT is 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 VIN-VOUT must be maintained or a minimum load of 1 mA required.
Cool-Power® ZVS Switching Regulators
Page 16 of 42
Rev 2.2
08/2016
vicorpower.com
800 927.9474
PI33xx-x0
PI3301-x0-LGIZ (3.3VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN =24V, L1 = 200nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Timing
[6]
Switching Frequency
Fault Restart Delay
fS
650
30
kHz
ms
tFR_DLY
Sync In (SYNCI)
Synchronization Frequency
Range
∆fSYNC
I
Relative to set switching frequency [3]
50
110
%
V
SYNCI Threshold
VSYNCI
2.5
Sync Out (SYNCO)
Source 1mA
SYNCO High
VSYNCO_HI
VSYNCO_LO
tSYNCO_RT
tSYNCO_FT
4.5
V
V
SYNCO Low
Sink 1mA
0.5
SYNCO Rise Time
SYNCO Fall Time
20pF load
10
10
ns
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
VTRK
Internal reference tracking range
0
1.04
V
1.2
40
V
VTRK_OV
ITRK
ITRK_DIS
tSS
20
60
mV
μA
mA
ms
-70
-50
6.8
2.2
-30
CTRK = 0μF
Enable
High Threshold
VEN_HI
VEN_LO
VEN_HYS
0.9
0.7
100
1
1.1
0.9
300
V
V
Low Threshold
0.8
200
Threshold Hysteresis
mV
Enable Pull-Up Voltage
(floating, unfaulted)
VEN_PU
VEN_PD
With positive logic EN polarity
With negative logic EN polarity
2
0
V
V
Enable Pull-Down Voltage
(floating, faulted)
Source Current
Sink Current
IEN_SO
IEN_SK
With positive logic EN polarity
With negative logic EN polarity
-50
50
μA
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 VOUT is 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 VIN-VOUT must be maintained or a minimum load of 1mA required.
Cool-Power® ZVS Switching Regulators
Page 17 of 42
Rev 2.2
08/2016
vicorpower.com
800 927.9474
PI33xx-x0
PI3301-x0-LGIZ (3.3VOUT) Electrical Characteristics
100
95
90
85
80
12VIN
75
24VIN
36VIN
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 24VIN, 3.3VOUT at 10A
700
600
500
12VIN
24VIN
36VIN
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 24VIN, 3.3VOUT at 5A
Cool-Power® ZVS Switching Regulators
Page 18 of 42
Rev 2.2
08/2016
vicorpower.com
800 927.9474
PI33xx-x0
PI3301-x0-LGIZ (3.3VOUT) Electrical Characteristics
12
10
8
36VIN
24VIN
8VIN
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
36VIN
24VIN
8VIN
50
75
100
125
Ambient Temperature (°C)
Figure 29 — Load Current vs. Ambient Temperature, 400 LFM
12
10
8
36VIN
6
4
2
0
24VIN
8VIN
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
vicorpower.com
800 927.9474
PI33xx-x0
PI3302-x0-LGIZ, PI3302-00-BGIZ (5.0VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 200nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Input Specifications
[7]
Input Voltage
Input Current
VIN_DC
IIN_DC
8
24
36
20
V
A
VIN = 24V, TC = 25°C, IOUT =10A
2.23
Input Current At Output Short
(fault condition duty cycle)
[2]
IIN_Short
mA
Disabled
2.0
2.5
mA
mA
Input Quiescent Current
Input Voltage Slew Rate
IQ_VIN
VIN_SR
Enabled (no load)
1
V/μs
Output Specifications
[2]
Output Voltage Total Regulation
Output Voltage Trim Range
Line Regulation
VOUT_DC
VOUT_DC
4.93
3.3
5.00
5.07
6.5
V
V
[3] [7]
∆VOUT ( ∆VIN) @25°C, 8V <VIN <36V
∆VOUT (∆IOUT) @25°C, 0.5A <IOUT <10A
0.10
0.10
30
%
Load Regulation
%
Output Voltage Ripple
VOUT_AC
IOUT_DC
IOUT_CL
IOUT = 5A, COUT = 4 x 47μF, 20MHz BW [4]
mVp-p
Continuous Output
Current Range
[5] [7]
10
A
A
Current Limit
12
Protection
VIN UVLO Start Threshold
VIN UVLO Stop Threshold
VIN UVLO Hysteresis
VUVLO_START
VUVLO_STOP
VUVLO_HYS
VOVLO_START
VOVLO_STOP
VOVLO_HYS
tf_DLY
7.10
6.80
7.60
7.25
0.33
38.4
8.00
7.60
V
V
V
VIN OVLO Start Threshold
VIN OVLO Stop Threshold
VIN OVLO Hysteresis
37.0
36.1
V
V
0.77
128
500
20
V
VIN UVLO/OVLO Fault Delay Time
VIN UVLO/OVLO Response Time
Output Overvoltage Protection
Number of the switching freq cycles
Above VOUT
Cycles
ns
%
tf
VOVP
Overtemperature
Fault Threshold
TOTP
130
135
30
140
°C
°C
Overtemperature
Restart Hysteresis
TOTP_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 VOUT is 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 VIN-VOUT must be maintained or a minimum load of 1mA required.
Cool-Power® ZVS Switching Regulators
Page 20 of 42
Rev 2.2
08/2016
vicorpower.com
800 927.9474
PI33xx-x0
PI3302-x0-LGIZ, PI3302-00-BGIZ (5.0VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 200nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Timing
[6]
Switching Frequency
Fault Restart Delay
fS
1.0
30
kHz
ms
tFR_DLY
Sync In (SYNCI)
Synchronization Frequency
Range
∆fSYNC
I
Relative to set switching frequency [3]
50
110
%
V
SYNCI Threshold
VSYNCI
2.5
Sync Out (SYNCO)
Source 1mA
SYNCO High
VSYNCO_HI
VSYNCO_LO
tSYNCO_RT
tSYNCO_FT
4.5
V
V
SYNCO Low
Sink 1mA
0.5
SYNCO Rise Time
SYNCO Fall Time
20pF load
10
10
ns
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
VTRK
0
1.04
V
1.2
40
V
VTRK_OV
ITRK
ITRK_DIS
tSS
20
60
mV
μA
mA
ms
-70
-50
6.8
2.2
-30
CTRK = 0μF
Enable
High Threshold
VEN_HI
VEN_LO
VEN_HYS
0.9
0.7
100
1
1.1
0.9
300
V
V
Low Threshold
0.8
200
Threshold Hysteresis
mV
Enable Pull-Up Voltage
(floating, unfaulted)
VEN_PU
VEN_PD
With positive logic EN polarity
With negative logic EN polarity
2
0
V
V
Enable Pull-Down Voltage
(floating, faulted)
Source Current
Sink Current
IEN_SO
IEN_SK
With positive logic EN polarity
With negative logic EN polarity
-50
50
μA
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 VOUT is 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 VIN-VOUT must 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 (5.0VOUT) Electrical Characteristics
100
95
90
85
80
75
12VIN
24VIN
36VIN
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 24VIN, 5.0VOUT at 10A
1.2
1.0
0.8
0.6
12VIN
24VIN
36VIN
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 24VIN, 5.0VOUT at 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 (5.0VOUT) Electrical Characteristics
12
10
8
36VIN
6
4
2
0
24VIN
8VIN
50
75
100
125
Ambient Temperature (°C)
Figure 37 — Load Current vs. Ambient Temperature, 0 LFM
12
10
8
6
4
2
0
36VIN
24VIN
8VIN
50
75
100
125
Ambient Temperature (°C)
Figure 38 — Load Current vs. Ambient Temperature, 400 LFM
12
10
8
36VIN
6
4
2
0
24VIN
8VIN
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
Rev 2.2
08/2016
vicorpower.com
800 927.9474
PI33xx-x0
PI3303-x0-LGIZ (12.0VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN =24V, L1 = 230nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Input Specifications
[7]
Input Voltage
Input Current
VIN_DC
IIN_DC
17.4
24
36
20
V
A
VIN = 24V, TC = 25°C, IOUT = 8A
4.15
Input Current At Output Short
(fault condition duty cycle)
[2]
IIN_Short
mA
Disabled
2.0
2.5
mA
mA
Input Quiescent Current
Input Voltage Slew Rate
IQ_VIN
VIN_SR
Enabled (no load)
1
V/μs
Output Specifications
[2]
Output Voltage Total Regulation
Output Voltage Trim Range
Line Regulation
VOUT_DC
VOUT_DC
11.82
6.5
12.0
12
12.18
13.0
V
V
[3] [7]
∆VOUT ( ∆VIN) @25°C, 8V <VIN <36V
∆VOUT (∆IOUT) @25°C, 0.5A <IOUT <8A
0.10
0.10
60
%
Load Regulation
%
Output Voltage Ripple
VOUT_AC
IOUT_DC
IOUT_CL
IOUT = 4A, COUT = 4 x 22μF, 20MHz BW [4]
mVp-p
Continuous Output
Current Range
[5]
8
A
A
Current Limit
9
Protection
VIN UVLO Start Threshold
VIN UVLO Stop Threshold
VIN UVLO Hysteresis
VUVLO_START
VUVLO_STOP
VUVLO_HYS
VOVLO_START
VOVLO_STOP
VOVLO_HYS
tf_DLY
15.80
15.00
16.60
15.80
0.77
17.40
16.60
V
V
V
VIN OVLO Start Threshold
VIN OVLO Stop Threshold
VIN OVLO Hysteresis
37.0
36.1
38.4
V
V
0.77
128
500
20
V
VIN UVLO/OVLO Fault Delay Time
VIN UVLO/OVLO Response Time
Output Overvoltage Protection
Number of the switching freq cycles
Above VOUT
Cycles
ns
%
tf
VOVP
Overtemperature
Fault Threshold
TOTP
130
135
30
140
°C
°C
Overtemperature
Restart Hysteresis
TOTP_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 VOUT is 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 VIN-VOUT must be maintained or a minimum load of 1mA required.
Cool-Power® ZVS Switching Regulators
Page 24 of 42
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PI33xx-x0
PI3303-x0-LGIZ (12.0VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN =24V, L1 = 230nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Timing
[6]
Switching Frequency
Fault Restart Delay
fS
1.4
30
kHz
ms
tFR_DLY
Sync In (SYNCI)
Synchronization Frequency
Range
∆fSYNC
I
Relative to set switching frequency [3]
50
110
%
V
SYNCI Threshold
VSYNCI
2.5
Sync Out (SYNCO)
Source 1mA
SYNCO High
VSYNCO_HI
VSYNCO_LO
tSYNCO_RT
tSYNCO_FT
4.5
V
V
SYNCO Low
Sink 1mA
0.5
SYNCO Rise Time
SYNCO Fall Time
20pF load
10
10
ns
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
VTRK
0
1.04
V
1.2
40
V
VTRK_OV
ITRK
ITRK_DIS
tSS
20
60
mV
μA
mA
ms
-70
-50
6.8
2.2
-30
CTRK = 0μF
Enable
High Threshold
VEN_HI
VEN_LO
VEN_HYS
0.9
0.7
100
1
1.1
0.9
300
V
V
Low Threshold
0.8
200
Threshold Hysteresis
mV
Enable Pull-Up Voltage
(floating, unfaulted)
VEN_PU
VEN_PD
With positive logic EN polarity
With negative logic EN polarity
2
0
V
V
Enable Pull-Down Voltage
(floating, faulted)
Source Current
Sink Current
IEN_SO
IEN_SK
With positive logic EN polarity
With negative logic EN polarity
-50
50
μA
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 VOUT is 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 VIN-VOUT must be maintained or a minimum load of 1mA required.
Cool-Power® ZVS Switching Regulators
Page 25 of 42
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800 927.9474
PI33xx-x0
PI3303-x0-LGIZ (12.0VOUT) Electrical Characteristics
100
95
90
85
80
17.4VIN
75
24VIN
36VIN
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 24VIN, 12.0VOUT at 8A
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
17.4VIN
24VIN
36VIN
1
2
3
4
5
6
7
8
Load Curent (A)
Figure 42 — Switching Frequency vs. Load Current
Figure 45 — Output Ripple 24VIN, 12.0VOUT at 4A
Cool-Power® ZVS Switching Regulators
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PI33xx-x0
PI3303-x0-LGIZ (12.0VOUT) Electrical Characteristics
9.0
8.0
7.0
6.0
36VIN
24VIN
5.0
4.0
3.0
2.0
1.0
0.0
18VIN
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
36VIN
24VIN
18VIN
50
75
100
125
Ambient Temperature (°C)
Figure 47 — Load Current vs. Ambient Temperature, 400 LFM
9.0
8.0
7.0
6.0
36VIN
24VIN
18VIN
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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PI33xx-x0
PI3305-x0-LGIZ (15.0VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN =24V, L1 = 230nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Input Specifications
[7]
Input Voltage
Input Current
VIN_DC
IIN_DC
20.4
24
36
20
V
A
VIN = 24V, TC = 25°C, IOUT = 8A
5.15
Input Current At Output Short
(fault condition duty cycle)
[2]
IIN_Short
mA
Disabled
2.0
2.5
mA
mA
Input Quiescent Current
Input Voltage Slew Rate
IQ_VIN
VIN_SR
Enabled (no load)
1
V/μs
Output Specifications
[2]
Output Voltage Total Regulation
Output Voltage Trim Range
Line Regulation
VOUT_DC
VOUT_DC
14.78
10.0
15.0
15
15.23
16
V
V
[3] [7]
∆VOUT ( ∆VIN) @25°C, 8V <VIN <36V
∆VOUT (∆IOUT) @25°C, 0.5A <IOUT <8A
0.1
0.1
60
%
Load Regulation
%
Output Voltage Ripple
VOUT_AC
IOUT_DC
IOUT_CL
IOUT = 4A, COUT = 4 x 22μF, 20MHz BW [4]
mVp-p
Continuous Output
Current Range
[5] [7]
8
A
A
Current Limit
9
Protection
VIN UVLO Start Threshold
VIN UVLO Stop Threshold
VIN UVLO Hysteresis
VUVLO_START
VUVLO_STOP
VUVLO_HYS
VOVLO_START
VOVLO_STOP
VOVLO_HYS
tf_DLY
18.4
17.4
19.4
18.4
0.90
38.4
20.4
19.4
V
V
V
VIN OVLO Start Threshold
VIN OVLO Stop Threshold
VIN OVLO Hysteresis
37.0
36.1
V
V
0.77
128
500
20
V
VIN UVLO/OVLO Fault Delay Time
VIN UVLO/OVLO Response Time
Output Overvoltage Protection
Number of the switching freq cycles
Above VOUT
Cycles
ns
%
tf
VOVP
Overtemperature
Fault Threshold
TOTP
130
135
30
140
°C
°C
Overtemperature
Restart Hysteresis
TOTP_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 VOUT is 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 VIN-VOUT must 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 (15.0VOUT) Electrical Characteristics
Unless otherwise specified: -40°C < TJ < 125°C, VIN = 24V, L1 = 230nH [1]
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Timing
[6]
Switching Frequency
Fault Restart Delay
fS
1.5
30
kHz
ms
tFR_DLY
Sync In (SYNCI)
Synchronization Frequency
Range
∆fSYNC
I
Relative to set switching frequency [3]
50
110
%
V
SYNCI Threshold
VSYNCI
2.5
Sync Out (SYNCO)
Source 1mA
SYNCO High
VSYNCO_HI
VSYNCO_LO
tSYNCO_RT
tSYNCO_FT
4.5
V
V
SYNCO Low
Sink 1mA
0.5
SYNCO Rise Time
SYNCO Fall Time
20pF load
10
10
ns
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
VTRK
0
1.04
V
1.2
40
V
VTRK_OV
ITRK
ITRK_DIS
tSS
20
60
mV
μA
mA
ms
-70
-50
6.8
2.2
-30
CTRK = 0μF
Enable
High Threshold
VEN_HI
VEN_LO
VEN_HYS
0.9
0.7
100
1
1.1
0.9
300
V
V
Low Threshold
0.8
200
Threshold Hysteresis
mV
Enable Pull-Up Voltage
(floating, unfaulted)
VEN_PU
VEN_PD
With positive logic EN polarity
With negative logic EN polarity
2
0
V
V
Enable Pull-Down Voltage
(floating, faulted)
Source Current
Sink Current
IEN_SO
IEN_SK
With positive logic EN polarity
With negative logic EN polarity
-50
50
μA
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 VOUT is 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 VIN-VOUT must 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 (15.0VOUT) Electrical Characteristics
100
95
90
85
80
12VIN
75
24VIN
36VIN
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 24VIN, 15.0VOUT at 8A
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
20.4VIN
24VIN
36VIN
1
2
3
4
5
6
7
8
Load Curent (A)
Figure 51 — Switching Frequency vs. Load Current
Figure 54 — Output Ripple 24VIN, 15.0VOUT at 4A
Cool-Power® ZVS Switching Regulators
Page 30 of 42
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800 927.9474
PI33xx-x0
PI3305-x0-LGIZ (15.0VOUT) Electrical Characteristics
9.0
8.0
7.0
6.0
36VIN
24VIN
5.0
4.0
3.0
2.0
1.0
0.0
21VIN
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
36VIN
24VIN
21VIN
50
75
100
125
Ambient Temperature (°C)
Figure 56 — Load Current vs. Ambient Temperature, 400 LFM
9.0
8.0
7.0
6.0
36VIN
24VIN
21VIN
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
VIN
VS1
VOUT
VIN
VOUT
COUT
CIN
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 VOUT. 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 0.8VDC with 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
1.0VDC with 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
VOUT pin to provide regulation when the REM connection is
broken. Referring to Figure 58, it is important to note that L1 and
COUT are the output filter and the local sense point for the power
supply output. As such, the REM pin should be connected at COUT
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 (TOTP), 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
(TOTP_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 (IOUT_CL
)
for 1024μs, a slow current limit fault is initiated and the regulator
is shutdown which eliminates output current flow. After Fault
Restart Delay (tFR_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 VIN falls 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 VIN recovers 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
VIN
VIN
VS1
VOUT
If VIN exceeds the input Overvoltage Lockout (OVLO) threshold
(VOVLO), while the controller is running, the PI33xx-x0 will
complete the current cycle and stop switching. If VIN recovers
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.
VOUT
CIN
COUT
PGND
PI33xx
(#1)
REM
PGD
SYNCI
SYNCO
EN
R1
SYNCO(#2)
SYNCI(#2)
EN(#2)
EAO(#2)
TRK(#2)
EAO
TRK
SGND
L1
VIN
VIN
VS1
VOUT
CIN
COUT
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
Cool-Power® ZVS Switching Regulators
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800 927.9474
PI33xx-x0
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 VOUT
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.
VOUT
R4
REM
Also, the PI33xx-20 devices allow for dynamic VOUT margining 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:
Rlow
R1
R2
ADJ
-
+
Rhigh
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 Rlow and Rhigh
are external resistors for which the designer can add to modify
VOUT to 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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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
1.0 k
1.13 k
1.13 k
1.0 k
1.0 k
100
100
100
100
100
100
100
0.806 k
1.5 k
CTRK = (tTRK x ITRK) – 100 x 10 -9,
2.61 k
4.53 k
11.0 k
14.0 k
Where, tTRK is the soft-start time and ITRK is 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, VOUT can simply be adjusted up or down by selecting the
proper Rhigh or Rlow value, respectively. The following equations
can be used to calculate Rhigh and Rlow values:
VOUT
1
V
OUT 2
(a)
Master VOUT
VOUT
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), Rhigh is 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 VOUT
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
200
200
230
230
FPV1006-125-R
FPV1006-150-R
FPT705-200-R
FPT705-200-R
FPT705-200-R
FPT705-230-R
FPT705-230-R
Eaton
Eaton
Coiltronics
Coiltronics
Coiltronics
Coiltronics
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.
CINPUT
Ripple
Current Current
COUTPUT
Ripple
Load
Step
(A)
CINPUT
Ceramic
X5R
CINPUT
Bulk
Elec.
COUTPUT
Ceramic
X5R
Input
Ripple
(mVpp)
Output
Ripple
(mVpp)
Output Recovery
VIN
(V)
ILOAD
(A)
Device
Ripple
Time
(µs)
(mVpp)
(IRMS
)
(IRMS
)
(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
24
24
24
24
24
24
0.5
0.8
-/+40
-/+40
40
40
25
20
30
30
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
4 x 4.7μF
4 x 4.7μF
4 x 4.7μF
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 CIN’s current is used
to satisfy the output load and to recharge the COUT capacitors.
When Q1 is off and Q2 is on, the load current is supplied by the
inductor and the COUT capacitor as shown in Figure 65. During
this period CIN is also being recharged by the VIN. Minimizing CIN
loop inductance is important to reduce peak voltage excursions
when Q1 turns off. Also, the difference in area between the CIN
loop and COUT loop 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
VIN
CIN
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.
COUT
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 CIN and COUT (and VIN and VOUT
for the high AC return current. This optimized layout is used on
the PI33xx-x0 evaluation board.
)
VIN
CIN
COUT
VOUT
Figure 63 — Typical Buck Converter
COUT
The path between the COUT and CIN capacitors is of particular
importance since the AC currents are flowing through both of
them when Q1 is turned on.
GND
CIN
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
VIN
PI33xx-x0 performance.
GND
VIN
CIN
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.
COUT
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
0.60
0.50
0.50
0.55
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
0.10
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
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
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accessory components, fully configurable AC-DC and DC-DC power supplies, and complete custom
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Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its use. Vicor makes no
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