TPS622315DRYR_技术文档

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

2 MHz / 3 MHz Ultra Small Step Down Converter in 1x1.5 SON Package

Check for Samples: TPS62230, TPS62231, TPS62232, TPS62233,

TPS62234, TPS62235, TPS62236, TPS62237, TPS62238, TPS62239, TPS622310, TPS622311

1

FEATURES

DESCRIPTION

•

2 MHz / 3 MHz Switch Frequency

Up to 94% Efficiency

The TPS6223X device family is a high frequency

synchronous step down DC-DC converter optimized

for battery powered portable applications. It supports

up to 500mA output current and allows the use of tiny

and low cost chip inductors and capacitors.

Output Peak Current up to 500mA

Excellent AC and Transient Load Regulation

High PSRR (up to 90dB)

Small External Output Filter Components 1μH/

4.7μF

With a wide input voltage range of 2.05V to 6V the

device supports applications powered by Li-Ion

batteries with extended voltage range. The minimum

input voltage of 2.05V allows as well the operation

from Li-primary or two alkaline batteries. Different

fixed output voltage versions are available from 1.2V

to 2.5V.

•

V_INrange from 2.05V to 6V

Optimized Power Save Mode For Low Output

Ripple Voltage

•

Forced PWM Mode Operation

Typ. 22 μA Quiescent Current

The TPS6223X series features switch frequency up

to 3.8MHz. At medium to heavy loads, the converter

operates in PWM mode and automatically enters

Power Save Mode operation at light load currents to

maintain high efficiency over the entire load current

range.

100% Duty Cycle for Lowest Dropout

Small 1 × 1.5 × 0.6mm³SON Package

12 mm²Minimum Solution Size

Supports 0.6 mm Maximum Solution Height

Soft Start with typ. 100μs Start Up Time

Because of its excellent PSRR and AC load

regulation performance, the device is also suitable to

replace linear regulators to obtain better power

conversion efficiency.

APPLICATIONS

•

LDO Replacement

Portable Audio, Portable Media

Cell Phones

Low Power Wireless

Low Power DSP Core Supply

Digital Cameras

The Power Save Mode in TPS6223X reduces the

quiescent current consumption down to 22μA during

light load operation. It is optimized to achieve very

low output voltage ripple even with small external

component and features excellent ac load regulation.

For very noise sensitive applications, the device can

be forced to PWM Mode operation over the entire

load range by pulling the MODE pin high. In the

shutdown mode, the current consumption is reduced

to less than 1μA. The TPS6223X is available in a 1 ×

1.5mm²6 pin SON package.

V

IN

L

TPS62231

1/2.2 mH

V

2.05 V - 6 V

OUT

VIN

SW

1.8 V

C

FB

EN

IN

C

OUT

MODE

GND

2.2 mF

4.7 mF

Total area

12mm²

L1

V

IN

C2

GND

V _OUT

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

UNLESS OTHERWISE NOTED this document contains

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

ORDERING INFORMATION

PACKAGE

DESIGNATOR

PACKAGE

MARKING

FREQUENCY

[MHz]

T_A

PART NUMBER⁽¹⁾

OUTPUT VOLTAGE⁽²⁾

ORDERING

TPS62230

2.5 V

1.8 V

1.2 V

1.0 V

1.1V

3

2

3

2

3

2

DRY

TPS62230DRY

TPS62231DRY

TPS62232DRY

TPS62239DRY

TPS622311DRY

TPS62235DRY

GV

GW

GX

OP

PA

TPS62231

TPS62232

TPS62239

TPS622311

TPS62235

1.2V

OQ

TPS6223-1.3⁽³⁾

TPS6223-1.5⁽³⁾

1.3 V

1.5 V

1.85V

2.0 V

2.1 V

2.25 V

2.3 V

2.7 V

2.9 V

3.0 V

3.3V

–40°C to 85°C TPS62236

TPS6223-2.0⁽³⁾

TPS62236DRY

OR

TPS62234

TPS62234DRY

TPS62238DRY

TPS622310DRY

OH

ON

OT

TPS62238

TPS622310

TPS6223-2.7⁽³⁾

TPS6223-2.9⁽³⁾

TPS62233

TPS62233DRY

TPS62237DRY

OG

OS

TPS62237

(1) The DRY package is available in tape on reel. Add R suffix to order quantities of 3000 parts per reel, T suffix for 250 parts per reel.

(2) Contact TI for other fixed output voltage options

(3) Device status is product preview, contact TI for more details

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range (unless otherwise noted)

(1)

VALUE

–0.3 to 7

UNIT

Voltage at VIN and SW Pin⁽²⁾

Voltage at EN, MODE Pin⁽²⁾

V

A

V_I

–0.3 to V_IN+0.3, ≤7

–0.3 to 3.6

internally limited

2

(2)

Voltage at FB Pin

Peak output current

HBM Human body model

kV

V

ESD rating⁽³⁾

CDM Charge device model

Machine model

1

200

Power dissipation

Internally limited

–40 to 125

–65 to 150

T_J

Maximum operating junction temperature

Storage temperature range

°C

T_stg

(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating

conditions is not implied. Exposure to absolute–maximum–rated conditions for extended periods may affect device reliability.

(2) All voltage values are with respect to network ground terminal.

(3) The human body model is a 100-pF capacitor discharged through a 1.5-kΩ resistor into each pin. The machine model is a 200-pF

capacitor discharged directly into each pin.

2

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Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

DISSIPATION RATINGS⁽¹⁾

PACKAGE

POWER RATING

FOR T_A≤ 25°C

DERATING FACTOR

ABOVE T_A= 25°C

R_θJA

1 × 1.5 SON

234°C/W⁽²⁾

420 mW

4.2 mW/°C

(1) Maximum power dissipation is a function of T_J(max), θ_JAand T_A. The maximum allowable power dissipation at any allowable ambient

temperature is P_D= [T_J(max)– T_A] /_θJA

.

(2) This thermal data is measured with high-K board (4 layers board according to JESD51-7 JEDEC standard).

RECOMMENDED OPERATING CONDITIONS

operating ambient temperature T_A= –40 to 85°C (unless otherwise noted)⁽¹⁾

MIN

NOM

MAX UNIT

(2)

Supply voltage V_IN

2.05

6

V

Effective inductance

Effective capacitance

2.2

4.7

3.0

2.5

μH

μF

2.0

(4)

V

_OUT≤ V_IN-1 V⁽³⁾

500 mA maximum I_OUT

350mA maximum I_OUT

3.6

2.7

Recommended minimum

supply voltage

(5)

V

V_OUT≤ 1.8V

60 mA maximum output current⁽⁵⁾

2.05

125

Operating virtual junction temperature range, T_J

–40

°C

(1) In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may

have to be derated. Maximum ambient temperature (T_A(max)) is dependent on the maximum operating junction temperature (T_J(max)), the

maximum power dissipation of the device in the application (P_D(max)), and the junction-to-ambient thermal resistance of the part/package

in the application (θ_JA), as given by the following equation: T_A(max)= T_J(max)– (θ_JA× P_D(max)).

(2) The minimum required supply voltage for startup is 2.05 V. The part is functional down to the falling UVL (Under Voltage Lockout)

threshold.

(3) For a voltage difference between minimum V_INand V_OUTof ≥ 1 V

(4) Typical value applies for T_A= 25°C, maximum value applies for T_A= 70°C with T_J≤ 125°C, PCB layout needs to support proper thermal

performance.

(5) Typical value applies for T_A= 25°C, maximum value applies for T_A= 85°C with T_J≤ 125°C, PCB layout needs to support proper thermal

performance.

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3

Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

ELECTRICAL CHARACTERISTICS

V_IN= 3.6V, V_OUT= 1.8V, EN = V_IN, MODE = GND, T_A= –40°C to 85°C⁽¹⁾typical values are at T_A= 25°C (unless otherwise

noted), C_IN= 2.2μF, L = 2.2μH, C_OUT= 4.7μF, see parameter measurement information

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX UNIT

SUPPLY

(2)

V_IN

Input voltage range

2.05

6

V

I_OUT= 0mA. PFM mode enabled (Mode = 0)

device not switching

22

25

40

μA

I_OUT= 0mA. PFM mode enabled (Mode = 0)

device switching, V_IN= 3.6V, V_OUT= 1.2V

μA

I_Q

Operating quiescent current

I_OUT= 0 mA. Switching with no load

(MODE/DATA = V_IN), PWM operation,

V_OUT= 1.8V, L = 2.2μH

3

mA

I_SD

Shutdown current

EN = GND⁽³⁾

0.1

1.8

1.9

1

1.9

μA

V

Falling

UVLO

Undervoltage lockout threshold

Rising

2.05

V

ENABLE, MODE THRESHOLD

V_{IH TH}Threshold for detecting high EN, MODE 2.05 V ≤ V_IN≤ 6V , rising edge

V_{IL TH HYS}Threshold for detecting low EN, MODE 2.05 V ≤ V_IN≤ 6V , falling edge

0.8

0.6

1

V

0.4

I_IN

Input bias Current, EN, MODE

EN, MODE = GND or V_IN= 3.6V

0.01

0.5

μA

POWER SWITCH

High side MOSFET on-resistance

600

350

850

480

R_DS(ON)

V_IN= 3.6V, T_Jmax= 85°C; R_DS(ON)max value

V_IN= 3.6V, open loop

mΩ

Low Side MOSFET on-resistance

Forward current limit MOSFET

high-side

690

550

850

1050 mA

I_LIMF

T_SD

Forward current limit MOSFET low side

Thermal shutdown

840

150

20

1220 mA

Increasing junction temperature

Decreasing junction temperature

°C

Thermal shutdown hysteresis

CONTROLLER

t_ONmin

Minimum ON time

V_IN3.6V, V_OUT= 1.8V, Mode = high, I_OUT= 0 mA

135

40

ns

t_OFFmin

OUTPUT

V_REF

Minimum OFF time

Internal Reference Voltage

0.70

0%

V

V_IN= 3.6V, Mode = GND, device operating in PFM

Mode, I_OUT= 0mA

Output voltage accuracy⁽⁴⁾

V_IN= 3.6V, MODE = V_IN

,

T_A= 25°C

–2.0%

2.0%

2.5%

%/mA

%/V

V_OUT

I_OUT= 0 mA

T_A= –40°C to 85°C –2.5%

DC output voltage load regulation

DC output voltage line regulation

PWM operation, Mode = V_IN= 3.6V, V_OUT= 1.8 V

0.001

0

I_OUT= 0 mA, Mode = V_IN, 2.05V ≤ V_IN≤ 6V

Time from active EN to V_OUT= 1.8V, V_IN= 3.6V,

10Ω load

V_IN= V_OUT= V_SW= 3.6 V, EN = GND⁽⁵⁾

t_Start

Start-up Time

100

0.1

μs

I_{LK_SW}

Leakage current into SW pin

0.5

μA

(1) In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may

have to be derated. Maximum ambient temperature (T_A(max)) is dependent on the maximum operating junction temperature (T_J(max)), the

maximum power dissipation of the device in the application (PD(max)), and the junction-to-ambient thermal resistance of the

part/package in the application (θ_JA), as given by the following equation: T_A(max)= T_J(max)– (θ_JA× P_D(max)).

(2) The minimum required supply voltage for startup is 2.05V. The part is functional down to the falling UVL (Under Voltage Lockout)

threshold

(3) Shutdown current into VIN pin, includes internal leakage

(4) V_IN= V_O+ 1.0 V

(5) The internal resistor divider network is disconnected from FB pin.

4

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Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

DRY PACKAGE

(TOP VIEW)

6

5

4

1

2

3

MODE

SW

FB

EN

VIN

GND

PIN FUNCTIONS

I/O

DESCRIPTION

NAME

VIN

NO

3

PWR V_INpower supply pin.

PWR GND supply pin

GND

EN

4

5

IN

This is the enable pin of the device. Pulling this pin to low forces the device into shutdown mode. Pulling

this pin to high enables the device. This pin must be terminated.

SW

2

OUT

This is the switch pin and is connected to the internal MOSFET switches. Connect the inductor to this

terminal

FB

6

1

IN

Feedback Pin for the internal regulation loop. Connect this pin directly to the output capacitor.

MODE

MODE pin = high forces the device to operate in PWM mode. Mode = low enables the Power Save Mode

with automatic transition from PFM (Pulse frequency mode) to PWM (pulse width modulation) mode.

FUNCTIONAL BLOCK DIAGRAM

VIN

Undervoltage

Lockout

VREF

0.70 V

Current

Bandgap

Limit Comparator

Limit

High Side

MODE

Softstart

MODE

PMOS

VIN

Gate Driver

Anti

Shoot-Through

Min. On Time

Control

Logic

SW

FB

EN

FB

Min. OFF Time

VREF

NMOS

Limit

Low Side

Integrated

Feed Back

Network

Error

Comparator

Thermal

Shutdown

Zero/Negative

Current Limit Comparator

EN

GND

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5

Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

PARAMETER MEASUREMENT INFORMATION

TPS6223X

L = 1/2.2 mH

V

= 2.05 V to 6 V

IN

V

OUT

VIN

SW

FB

C

EN

IN

OUT

2.2 mF

4.7 mF

MODE

GND

C

: Murata GRM155R60J225ME15D 2.2 mF 0402 size

IN

C

: Murata GRM188R60J475ME 4.7 mF 0603 size, VOUT >= 1.8 V

: Taiyo Yuden AMK105BJ475MV 4.7 mF 0402 size, VOUT = 1.2 V

OUT

l: Murata LQM2HPN1R0MJ0 1 mH, LQM2HPN2R2MJ0 2.2 mH,

size 2.5x2.0x1.2mm³

TYPICAL CHARACTERISTICS

Table of Graphs

FIGURE

1, 2, 3, 4, 5, 6, 7

8, 9, 10, 11

η

Efficiency

vs Load current

vs Output Current

12, 13, 14, 15,

16, 17

V_O

Output voltage

vs Output current

18, 19, 20, 21,

22, 23, 24, 25,

26, 27

Switching frequency

vs Output current

I_Q

Quiescent current

vs Ambient temperature

28

I_SD

Shutdown current

29

PMOS Static drain-source on-state resistance

NMOS Static drain-source on-state resistance

Power supply rejection ratio

Typical operation

vs Supply voltage and ambient temperature

vs Frequency

30

r_DS(ON)

PSRR

31

32

33, 34, 35

PFM

36

Line transient response

PWM

37

38

Mode transition PFM / forced PWM

AC - load regulation performance

Load transient response

39, 40, 41

42, 43, 44, 45

46, 47

48

Start-up

Spurious Output Noise, 12R Load

Spurious Output Noise, 100R Load

49

6

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Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

TYPICAL CHARACTERISTICS (continued)

100

90

80

70

60

100

90

80

70

60

50

40

30

20

10

0

V

= 3.6 V

= 2.9 V

IN

V

= 2.9 V

IN

V

= 3.6 V

IN

V

= 4.2 V

IN

V

IN

V

= 4.2 V

IN

V

= 5 V

IN

V

= 5 V

IN

50

40

30

20

10

0

MODE = GND,

= 2.5V,

MODE = V

,

V

IN

= 2.5 V,

OUT

V

L = 2.2 mH (LQM2HPN2R2MJ0)

= 4.7 mF

OUT

C

L = 2.2 mH (LQM2HPN2R2MJ0)

= 4.7 mF

OUT

C

OUT

0.1

1

I

10

- Output Current - mA

100

1000

1

10

I - Output Current - mA

O

100

1000

O

Figure 1. Efficiency PFM/PWM Mode 2.5V Output Voltage

Figure 2. Efficiency Forced PWM Mode 2.5V Output Voltage

100

90

100

V

= 2.3 V

IN

90

80

70

60

50

40

30

20

10

0

V

= 2.3 V

IN

80

70

60

50

V

= 2.7 V

V

= 2.7 V

IN

V

= 3.3 V

IN

V

= 3.3 V

V

= 3.6 V

IN

V

= 3.6 V

IN

V

= 4.2 V

IN

V

= 4.2 V

V

= 5 V

IN

40

30

20

V

= 5 V

IN

MODE = GND,

= 1.8 V,

MODE = V

,

IN

= 1.8 V,

V

OUT

V

OUT

L = 2.2 mH (MIPSA25202R2),

= 4.7 mF

L = 2.2 mH (MIPSA25202R2),

= 4.7 mF

C

10

0

OUT

C

OUT

0.1

1

I

10

- Output Current - mA

100

1000

1

10

100

1000

I - Output Current - mA

O

Figure 3. Efficiency PFM/PWM MODE 1.8V Output Voltage

Figure 4. Efficiency Forced PWM Mode 1.8V Output voltage

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Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

TYPICAL CHARACTERISTICS (continued)

100

90

80

70

60

100

90

80

70

60

50

V

= 2.3 V

IN

V

= 2.3 V

IN

V

= 2.7 V

IN

V

= 2.7 V

IN

V

= 3.6 V

IN

V

= 3.6 V

IN

V

= 4.2 V

IN

V

= 4.2 V

50

40

30

20

IN

V

= 5 V

IN

V

= 5 V

40

30

20

10

0

IN

MODE = GND,

= 1.2 V,

MODE = V

,

IN

= 1.2 V,

V

OUT

V

OUT

L = 2.2 mH MIPSZ2012 2R2 (2012 size),

= 4.7 mF

L = 2.2 mH MIPSZ2012 2R2 (2012 size),

= 4.7 mF

C

10

0

OUT

C

OUT

1

10 100

- Output Current - mA

1000

0.1

1

10

- Output Current - mA

100

1000

I

O

Figure 5. Efficiency PFM/PWM Mode 1.2V Output voltage

Figure 6. Efficiency Forced PWM Mode 1.2V Output Voltage

100

90

85

V

= 3.6 V

IN

90

80

70

60

50

40

30

20

10

0

V

= 4.2 V

IN

V

= 5 V

IN

MIPSA25202R2

L = 2.2 mH

(2.5x2x1.2mm³)

MIPSD1R0

L = 1 mH 0805

80

75

(2x1.25x1mm³)

LQM2HPN1R0MJ0

L = 1 mH

(2.5x2x1.2mm³)

MIPSZ2012D2R2

L = 2.2 mH 0805

(2x1.25x1mm³)

70

65

LQM21PN2R2

L = 2.2 mH 0805

(2x1.25x0.55mm³)

MODE = GND,

TPS62233

MODE = GND,

60

55

50

C

V

= 2.2 mF (0402),

IN

V

= 3 V,

= 4.7 mF (0402),

OUT

L = 1 mH,

= 4.7 mF

= 1.8 V,

100

OUT

C

OUT

V

= 3.6 V

IN

0.1

1

10

- Output Current - mA

100

1000

0.1

1

I

10

1000

I

- Output Current - mA

O

Figure 7. Comparison Efficiency vs Inductor Value and Size

Figure 8. Comparison Efficiency vs I_OUT– TPS62233

8

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Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

TYPICAL CHARACTERISTICS (continued)

100

90

80

70

60

50

90

80

70

60

V

= 3.3 V

IN

V

= 3.3 V

IN

V

= 3.6 V

IN

V

= 3.6 V

IN

V

= 4.2 V

IN

V

= 4.2 V

IN

50

40

30

40

30

TPS62236

= 1.85 V PFM

V

= 1.2 V PFM,

OUT

MODE = GND

V

OUT

0.1

1

10

- Output Current - mA

100

1000

0.1

1

10

- Output Current - mA

100

1000

I

O

Figure 9. Comparison Efficiency vs I_OUT– TPS62235

Figure 10. Comparison Efficiency vs I_OUT– TPS62236

2.575

90

V

= 3.3 V

MODE = V

,

IN

= 2.5 V,

V

OUT

2.55

2.525

2.5

80

70

60

50

L = 1 mH,

C

T

= 4.7 mF,

OUT

V

= 3.6 V

IN

= 25°C

A

V

= 3.3 V

IN

V

= 4.2 V

IN

V

= 3.6 V

IN

V

= 4.2 V

IN

V

= 5 V

2.475

IN

40

30

2.45

TPS622311

V

= 1.1 V PFM

OUT

2.425

0.1

1

I

10

- Output Current - mA

100

1000

0.1

1

10

- Output Current - mA

100

1000

I

O

Figure 11. Comparison Efficiency vs I_OUT– TPS622311

Figure 12. 2.5V Output Voltage Accuracy forced PWM Mode

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TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

TYPICAL CHARACTERISTICS (continued)

2.575

2.55

1.854

1.836

1.818

MODE = GND,

= 2.5 V,

MODE = GND,

= 1.8 V,

V

OUT

V

OUT

L = 1 mH,

L = 2.2 mH,

C

T

= 4.7 mF,

OUT

C

T

= 4.7 mF,

OUT

= 25°C

A

= 25°C

A

V

= 4.2 V

= 3.3 V

IN

V

= 5 V

2.525

2.5

IN

V

= 3.6 V

= 4.2 V

V

= 3.3 V

IN

1.8

1.782

1.764

1.746

V

IN

V

= 3.6 V

IN

V

IN

2.475

V

= 5 V

IN

2.45

2.425

0.1

1

10

- Output Current - mA

100

1000

0.01

0.1

1

10

- Output Current - mA

100

1000

I

O

Figure 13. 2.5V Output Voltage Accuracy PFM/PWM Mode

Figure 14. 1.8V Output Voltage Accuracy PFM/PWM Mode

1.854

1.236

MODE = V

,

MODE = V

,

IN

= 1.2 V,

IN

= 1.8 V,

V

OUT

1.836

1.818

1.8

1.224

1.212

1.2

L = 2.2 mH,

L = 1 mH,

C

T

= 4.7 mF,

C

T

= 4.7 mF,

OUT

= 25°C

V = 3.3 V

IN

A

V

= 3.3 V

IN

V

= 3.6 V

IN

V

= 3.6 V

IN

V

= 5 V

IN

V

= 4.2 V

V

IN

V

= 4.2 V

1.188

1.782

IN

= 5 V

IN

1.176

1.164

1.764

1.746

0.1

1

I

10

- Output Current - mA

100

1000

0.1

1

I

10

- Output Current - mA

100

1000

O

Figure 15. 1.8V Output Voltage Accuracy Forced PWM MODE

Figure 16. 1.2V Output Voltage Accuracy Forced PWM MODE

10

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TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

TYPICAL CHARACTERISTICS (continued)

1.236

1.224

1.212

1.2

4000

3500

3000

2500

2000

1500

1000

MODE = GND,

= 1.2 V,

V

OUT

V

= 5 V

IN

L = 2.2 mH,

C

T

= 4.7 mF,

OUT

V

= 4.2 V

IN

= 25°C

A

V

= 3.6 V

V

= 3.3 V

IN

V

= 3.3 V

IN

V

= 3.6 V

IN

V

= 4.2 V

IN

1.188

V

= 5 V

IN

MODE = GND,

= 1.8 V,

V

= 2.7 V

OUT

IN

L = 2.2 mH,

1.176

1.164

V

= 2.3 V

500

0

C

T

= 4.7 mF,

OUT

= 25°C

IN

A

0

100

200 300

- Output Current - mA

400

500

0.01

0.1

1

10

- Output Current - mA

100

1000

I

O

Figure 17. 1.2V Output Voltage Accuracy PFM/PWM MODE

Figure 18. Switching Frequency vs Output Current, 1.8V Output

Voltage MODE = GND

4000

V

= 5 V

V

IN

V

= 5 V

V

IN

= 4.2 V

V

= 4.2 V

IN

3500

3000

2500

2000

1500

1000

3500

3000

2500

2000

1500

1000

IN

V

= 3.6 V

V

= 3.6 V

V

IN

= 3.3 V

IN

= 3.3 V

IN

MODE = GND,

= 1.8 V,

MODE = V

,

IN

= 1.8 V,

V

= 2.7 V

OUT

IN

V

OUT

V

= 2.7 V

IN

L = 1 mH,

L = 2.2 mH,

V

= 2.3 V

V

= 2.3 V

100

IN

C

T

= 4.7 mF,

OUT

500

0

500

0

C

T

= 4.7 mF,

OUT

= 25°C

A

= 25°C

A

0

100

I

200 300

- Output Current - mA

400

500

0

200

- Output Current - mA

O

300

400

500

I

O

Figure 19. Switching Frequency vs Output Current, 1.8V Output Figure 20. Switching Frequency vs Output Current, 1.8V Output

Voltage MODE = GND

Voltage MODE = V_IN

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Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

TYPICAL CHARACTERISTICS (continued)

4000

V

= 5 V

V

MODE = V

,

IN

MODE = GND,

= 2.5 V,

IN

= 2.5 V,

OUT

V

= 4.2 V

V

OUT

IN

3500

3000

2500

2000

1500

1000

V

= 5 V

3500

3000

2500

2000

1500

1000

IN

L = 2.2 mH,

V

= 3.6 V

IN

V

= 4.2 V

C

T

= 4.7 mF,

C

T

= 4.7 mF,

OUT

= 25°C

IN

OUT

V

= 3.3 V

IN

= 25°C

A

V

= 3.6 V

IN

V

= 3.3 V

IN

V

= 3 V

100

V

= 3 V

500

0

500

0

IN

0

200 300

- Output Current - mA

400

500

0

100

200 300

- Output Current - mA

400

500

I

O

Figure 21. Switching Frequency vs Output Current, 2.5V Output Figure 22. Switching Frequency vs Output Current, 2.5V Output

Voltage MODE = GND

Voltage MODE = V_IN

3000

2500

2000

1500

1000

3500

3000

2500

2000

1500

1000

500

V

= 5 V

IN

V

= 5 V

IN

V

= 4.2 V

IN

V

= 4.2 V

V

IN

V

= 3.3 V

IN

= 3.6 V

IN

V

= 3.6 V

V

IN

V

= 3.3 V

IN

= 2.7 V

IN

V

= 2.3 V

IN

V

= 2.7 V

V

= 2 V

IN

MODE = GND,

= 1.2 V,

V

= 2.3 V

IN

MODE = V

,

IN

= 1.2 V,

V

OUT

V

= 2 V

IN

V

OUT

L = 2.2 mH,

500

0

L = 2.2 mH,

C

T

= 4.7 mF,

OUT

C

T

= 4.7 mF,

OUT

= 25°C

A

= 25°C

A

0

100

200 300

- Output Current - mA

400

500

0

100

200

300

400

500

I

I - Output Current - mA

O

Figure 23. Switching Frequency vs Output Current, 1.2V Output Figure 24. Switching Frequency vs Output Current, 1.2V Output

Voltage MODE = GND

Voltage MODE = V_IN

12

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TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

2500

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

TYPICAL CHARACTERISTICS (continued)

3000

2500

2000

1500

1000

V

= 5 V

V

IN

= 4.2 V

V

= 5 V

V

IN

V

= 3.6 V

IN

2000

= 4.2 V

IN

1500

V

= 2.3 V

V

= 2.7 V

V

= 3.3 V

IN

V

= 3.3 V

IN

1000

V

= 3.6 V

IN

TPS62235

MODE = GND,

= 1.2 V,

TPS62236

MODE = GND,

V

= 2.7 V

IN

V

500

0

OUT

V

= 1.85 V,

500

0

OUT

V

= 2.3 V

IN

L = 2.2 mH,

= 4.7 mF

L = 2.2 mH,

= 4.7 mF

C

OUT

C

OUT

0

0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50

- Output Current - A

0

0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45

- Output Current - A

I

O

Figure 25. Switching Frequency vs Output Current, 1.2V Output

Voltage MODE = PFM – TPS62235

Figure 26. Switching Frequency vs Output Current, 1.85V

Output Voltage MODE = PFM –TPS62236

3000

2500

35

T

= 85°C

A

T

= 60°C

T

= 25°C

A

30

25

20

15

10

V

= 5 V

IN

V

= 4.2 V

IN

2000

1500

1000

V

= 2.7 V

IN

V

= 3.3 V

IN

V

= 2.3 V

T

A

= -40°C

IN

TPS622311

MODE = GND,

V

= 1.1 V,

OUT

500

0

L = 2.2 mH,

= 4.7 mF

C

OUT

0

0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50

- Output Current - A

2

2.5

3

3.5

4

4.5

- Input Voltage - V

5

5.5

6

I

V

O

IN

Figure 27. Switching Frequency vs Output Current, 1.1V Output

Voltage MODE = PFM – TPS622311

Figure 28. Quiescent Current I_Qvs Ambient Temperature T_A

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Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

TYPICAL CHARACTERISTICS (continued)

0.2

0.18

0.16

0.14

0.12

0.1

2

1.8

1.6

1.4

1.2

1

PMOS

T

= 85°C

T

= 85°C

A

T

= 60°C

A

T

= 25°C

A

T

A

= -40°C

0.08

0.06

0.04

0.8

0.6

0.4

0.2

0

T

= -40°C

A

T

= 25°C

T

= 60°C

A

0.02

0

2

2.5

3

3.5

4

4.5

- Input Voltage - V

5

5.5

6

2

2.5

3

3.5

4

4.5

- Input Voltage - V

5

5.5

6

V

IN

Figure 29. Shutdown Current I_SDvs Ambient Temperature T_A

Figure 30. PMOS R_DSONvs Supply Voltage V_INand Ambient

Temperature T_A

100

0.7

I

= 50 mA,

OUT

MODE = 0,

forced PWM

NMOS

90

80

70

60

50

40

30

20

10

0

T

= 85°C

T

A

0.6

0.5

0.4

0.3

0.2

0.1

0

= 60°C

T

A

= 25°C

A

I

= 50 mA,

T

A

= -40°C

OUT

MODE = 1,

PFM/PWM

I

= 150 mA,

OUT

PWM Mode

V

= 3.6 V,

IN

= 1.8 V,

= 2.2 mF,

= 4.7 mF,

OUT

C

IN

OUT

L = 2.2 mH

10

100

1k 10k

f - Frequency - kHz

100k

1M

2

2.5

3

3.5

4

4.5

- Input Voltage - V

5

5.5

6

V

IN

Figure 31. NMOS R_DSONvs Supply Voltage V_INand Ambient

Temperature T_A

Figure 32. TPS62231 1.8V PSRR

14

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TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

TYPICAL CHARACTERISTICS (continued)

SW

2 V/div

V

= 3.6 V

IN

V

= 2.5V

C

= 4.7 mF

OUT

20 mV/div

L = 2.2 mH

V

= 3.6V

MODE = GND

IN

SW

C

= 4.7 mF

I

= 10 mA

V

= 2.5V

OUT

L = 1 mH

OUT

2 V/div

20 mV/Div

MODE = GND

I

= 10 mA

OUT

I

L

200 mA/Div

200 mA/div

t - Time - 1 ms/div

Figure 33. PFM Mode Operation I_OUT= 10mA

t - Time - 1 ms/div

Figure 34. PFM Mode Operation I_OUT= 10mA

V

= 3.6 V

MODE = V

IN

C

= 4.7 mF

I

= 10 mA

OUT

V

= 2.5 V

OUT

V

= 3.6 V to 4.2 V

IN

L = 1 mH

20 mV/div

200 mV/div

SW

2 V/div

I

L

200 mA/div

V

= 1.8 V

C

= 4.7 mF

OUT

20 mV/div

L = 2.2 mH

MODE = GND

= 50 mA

I

OUT

t - Time - 500 ns/div

t - Time - 10 ms/div

Figure 35. Forced PWM Mode Operation I_OUT= 10mA

Figure 36. Line Transient Response PFM Mode

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TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

TYPICAL CHARACTERISTICS (continued)

MODE: 0 V to 3.6 V

2 V/div

Forced PWM

Mode Operation

V

= 3.6 V to 4.2 V

IN

200 mV/div

PFM Mode Operation

V

SW

2 V/div

V

= 3.6 V,

IN

C

= 4.7 mF

OUT

I

COIL

L = 1 mH

= 10 mA

200 mA/div

I

OUT

C

= 4.7 mF

OUT

V

= 1.8 V

OUT

L = 2.2 mH

MODE = V

20 mV/div

IN

V

= 1.8 V

OUT

I

= 50 mA

OUT

20 mV/div

t - Time - 1 ms/div

Figure 38. Mode Transition PFM / Forced PWM Mode

t - Time - 100 ms/div

Figure 37. Line Transient Response PWM Mode

V

= 3.6 V

IN

V

= 2.5 V

V

= 2.5 V

OUT

C

= 4.7 mF

OUT

50 mV/div

L = 2.2 mH

MODE = GND

V

= 3.6 V

IN

I

= 5 mA to 200 mA

C

= 4.7 mF

OUT

I_OUT= 5mA to 200mA

sinusoidal

OUT

sinusoidal

100 mA/div

L = 2.2 mH

MODE = V

100mA/Div

IN

I

L

200 mA/div

t - Time - 5 ms/div

Figure 39. AC – Load Regulation Performance 2.5V V_OUTPFM

Mode

Figure 40. AC – Load Regulation Performance 2.5V V_OUTPWM

Mode

16

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TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

TYPICAL CHARACTERISTICS (continued)

V

= 3.6 V

IN

V

= 2.5 V

C

= 4.7 mF

OUT

V

= 1.8 V

OUT

50 mV/div

L = 2.2 mH

MODE = GND

50 mV/div

V

= 3.6 V

IN

I

= 5 mA to 150 mA, 50 kHz

OUT

C

= 4.7 mF

OUT

sinusoidal 100 mA/div

I

= 5 mA to 200 mA

L = 1 mH

MODE = GND

OUT

100 mA/div

I

L

I

L

200 mA/div

t - Time - 4 ms/div

t - Time - 5 ms/div

Figure 41. AC – Load Regulation Performance 1.8V V_OUTPFM

Mode

Figure 42. Load Transient Response 5mA to 200mA PFM to

PWM Mode, V_OUT2.5V

V

= 3.6 V

IN

C

= 4.7 mF

V

= 2.5 V

OUT

50 mV/div

V

= 1.8 V

OUT

L = 2.2 mH

MODE = GND

50 mV/div

V

= 3.6 V

IN

C

= 4.7 mF

OUT

I

= 5 mA to 200 mA

OUT

L = 1 mH

100 mA/div

MODE = V

IN

I

= 5 mA to 150 mA

OUT

100 mA/div

I

L

200 mA/div

t - Time - 10 ms/div

t - Time - 5 ms/div

Figure 43. Load Transient Response 5mA to 200mA, Forced

PWM Mode, V_OUT2.5V

Figure 44. Load Transient Response 5mA to 150mA, PFM to

PWM Mode, V_OUT1.8V

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Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

TYPICAL CHARACTERISTICS (continued)

V

= 3.6 V

IN

C

= 4.7 mF

EN

OUT

V

= 1.8 V

2 V/div

OUT

L = 2.2 mH

MODE = V

50 mV/div

IN

SW

2 V/div

V

= 3.6 V

IN

V

= 0 V to 2.5 V

C

= 4.7 mF

OUT

1 V/div

I

= 5 mA to 150 mA

L = 1 mH

MODE = GND

Load = 20 R

OUT

100 mA/div

I

L

I

200 mA/div

IN

50 mA/div

t - Time - 20 ms/div

Figure 46. Start Up into 20Ω Load, V_OUT2.5V

t - Time - 10 ms/div

Figure 45. Load Transient Response 5mA to 150mA, Forced

PWM Mode, V_OUT1.8V

1m

TPS62231

MODE = GND,

Ref Lvl = 1mV

RBW 30kHz

VBW 30kHz

SWT ´115ms

EN 2 V/div

900m

V

= 1.8 V,

OUT

R

_LOAD= 12R

800m

700m

600m

L = 2.2 mH,

(MIPSZ2012 2R2, Size 2012)

V

= 1.8 V

V

Pre Bias = 1V

OUT

1 V/div

C

= 4.7 mF (Size 0402)

OUT

V_IN= 2.7V(green)

500m

400m

300m

200m

SW 5 V/div

V_IN= 3V(red)

V

= 3.6 V

IN

C

= 4.7 mF

OUT

L = 2.2 mH

MODE = GND

= 0 mA

V_IN= 3.6V(blue)

I_L

200 mA/div

I

OUT

V_IN= 4.2V(yellow)

100m

10n

Time Base - 20 ms/div

Start

0 Hz

4 MHz

f - Frequency

Stop

40 MHz

Figure 47. Startup in 1V Pre-biased Output

Figure 48. Spurious Output Noise, 12R Load, TPS62231

18

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TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

TYPICAL CHARACTERISTICS (continued)

1m

TPS62231

MODE = GND,

Ref Lvl = 1mV

RBW 30kHz

VBW 30kHz

SWT 28ms

900m

V

= 1.8 V,

OUT

R

_LOAD= 100R

800m

700m

600m

L = 2.2 mH,

(MIPSZ2012 2R2, Size 2012)

C

= 4.7 mF (Size 0402)

OUT

V_IN= 4.2V(yellow)

500m

400m

300m

200m

V_IN= 3.6V(blue)

V_IN= 3V(red)

V_IN= 2.7V(green)

100m

10n

Start

0 Hz

1 MHz

Stop

10 MHz

f - Frequency

Figure 49. Spurious Output Noise, 100R Load, TPS62231

DETAILED DESCRIPTION

The TPS6223X synchronous step down converter family includes a unique hysteretic PWM controller scheme

which enables switch frequencies over 3MHz, excellent transient and AC load regulation as well as operation

with cost competitive external components.

The controller topology supports forced PWM Mode as well as Power Save Mode operation. Power Save Mode

operation reduces the quiescent current consumption down to 22μA and ensures high conversion efficiency at

light loads by skipping switch pulses.

In forced PWM Mode, the device operates on a quasi fixed frequency, avoids pulse skipping, and allows filtering

of the switch noise by external filter components.

The TPS6223X devices offer fixed output voltage options featuring smallest solution size by using only three

external components.

The internal switch current limit of typical 850mA supports output currents of up to 500mA, depending on the

operating condition.

A significant advantage of TPS6223X compared to other hysteretic PWM controller topologies is its excellent DC

and AC load regulation capability in combination with low output voltage ripple over the entire load range which

makes this part well suited for audio and RF applications.

OPERATION

Once the output voltage falls below the threshold of the error comparator, a switch pulse is initiated, and the high

side switch is turned on. It remains turned on until a minimum on time of t_ONminexpires and the output voltage

trips the threshold of the error comparator or the inductor current reaches the high side switch current limit. Once

the high side switch turns off, the low side switch rectifier is turned on and the inductor current ramps down until

the high side switch turns on again or the inductor current reaches zero.

In forced PWM Mode operation, negative inductor current is allowed to enable continuous conduction mode even

at no load condition.

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19

Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

POWER SAVE MODE

Connecting the MODE pin to GND enables the automatic PWM and power-save mode operation. The converter

operates in quasi fixed frequency PWM mode at moderate to heavy loads and in the PFM (Pulse Frequency

Modulation) mode during light loads, which maintains high efficiency over a wide load current range.

In PFM Mode, the device starts to skip switch pulses and generates only single pulses with an on time of t_ONmin

.

The PFM Mode frequency depends on the load current and the external inductor and output capacitor values.

The PFM Mode of TPS6223X is optimized for low output voltage ripple if small external components are used.

Even at low output currents, the PFM frequency is above the audible noise spectrum and makes this operation

mode suitable for audio applications.

The on time t_ONmincan be estimated to:

V_OUT

t_ONmin

=

´ 260 ns

V

IN

(1)

(2)

Therefore, the peak inductor current in PFM mode is approximately:

(V - V_OUT

IN

)

I_LPFMpeak

=

´ t_ONmin

L

With

t_ON: High side switch on time [ns]

V_IN: Input voltage [V]

V_OUT: Output voltage [V]

L : Inductance [μH]

I_LPFMpeak: PFM inductor peak current [mA]

FORCED PWM MODE

Pulling the MODE pin high forces the converter to operate in a continuous conduction PWM mode even at light

load currents. The advantage is that the converter operates with a quasi fixed frequency that allows simple

filtering of the switching frequency for noise-sensitive applications. In this mode, the efficiency is lower compared

to the power-save mode during light loads.

For additional flexibility, it is possible to switch from power-save mode to forced PWM mode during operation.

This allows efficient power management by adjusting the operation of the converter to the specific system

requirements.

100% DUTY CYCLE LOW DROPOUT OPERATION

The device starts to enter 100% duty cycle mode once the input voltage comes close to the nominal output

voltage. In order to maintain the output voltage, the High Side switch is turned on 100% for one or more cycles.

With further decreasing V_INthe High Side MOSFET switch is turned on completely. In this case the converter

offers a low input-to-output voltage difference. This is particularly useful in battery-powered applications to

achieve longest operation time by taking full advantage of the whole battery voltage range.

The minimum input voltage to maintain regulation depends on the load current and output voltage, and can be

calculated as:

V min = V_OUTmax + I_OUTmax ´

IN

R_DS(on)max+ R_L

(

)

(3)

With:

I_OUTmax = maximum output current plus inductor ripple current

R_DS(on)max = maximum P-channel switch RDSon.

R_L= DC resistance of the inductor

V_OUTmax = nominal output voltage plus maximum output voltage tolerance

20

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Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

UNDER VOLTAGE LOCKOUT

The under voltage lockout circuit prevents the device from misoperation at low input voltages. It prevents the

converter from turning on the switch or rectifier MOSFET under undefined conditions. The TPS6223X devices

have a UVLO threshold set to 1.8V (typical). Fully functional operation is permitted for input voltage down to the

falling UVLO threshold level. The converter starts operation again once the input voltage trips the rising UVLO

threshold level.

SOFT START

The TPS6223X has an internal soft-start circuit that controls the ramp up of the output voltage and limits the

inrush current during start-up. This limits input voltage drops when a battery or a high-impedance power source

is connected to the input of the converter.

The soft-start system generates a monotonic ramp up of the output voltage and reaches the nominal output

voltage typically 100μs after EN pin was pulled high.

Should the output voltage not have reached its target value by this time, such as in the case of heavy load, the

converter then operates in a current limit mode set by its switch current limits.

TPS6223X is able to start into a pre-biased output capacitor. The converter starts with the applied bias voltage

and ramps the output voltage to its nominal value.

ENABLE / SHUTDOWN

The device starts operation when EN is set high and starts up with the soft start as previously described. For

proper operation, the EN pin must be terminated and must not be left floating.

Pulling the EN pin low forces the device into shutdown, with a shutdown quiescent current of typically 0.1μA. In

this mode, the P and N-channel MOSFETs are turned off, the internal resistor feedback divider is disconnected,

and the entire internal-control circuitry is switched off.

The EN input can be used to control power sequencing in a system with various DC/DC converters. The EN pin

can be connected to the output of another converter, to drive the EN pin high and getting a sequencing of supply

rails.

SHORT-CIRCUIT PROTECTION

The TPS6223X integrates a High Side and Low Side MOSFET current limit to protect the device against heavy

load or short circuit. The current in the switches is monitored by current limit comparators. When the current in

the P-channel MOSFET reaches its current limit, the P-channel MOSFET is turned off and the N-channel

MOSFET is turned on to ramp down the current in the inductor. The High Side MOSFET switch can only turn on

again, once the current in the Low Side MOSFET switch has decreased below the threshold of its current limit

comparator.

THERMAL SHUTDOWN

As soon as the junction temperature, T_J, exceeds 150°C (typical) the device goes into thermal shutdown. In this

mode, the High Side and Low Side MOSFETs are turned-off. The device continues its operation when the

junction temperature falls below the thermal shutdown hysteresis.

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21

Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

APPLICATION INFORMATION

L

V

IN

TPS62230

1/2.2 mH

V

2.7 V - 6 V

OUT

VIN

EN

SW

FB

2.5 V

C

OUT

IN

2.2

MODE

GND

4.7 mF

mF

Figure 50. TPS62230 2.5V Output

L

V

IN

TPS62231

1/2.2 mH

2.05 V - 6 V

V

OUT

SW

FB

VIN

EN

1.8 V

C

IN

OUT

GND

2.2 mF

MODE

4.7 mF

Figure 51. TPS62231 1.8V Output

L

V

IN

TPS62232

1/2.2 mH

2.05 V - 6 V

V

OUT

SW

FB

VIN

EN

1.2 V

C

IN

OUT

GND

2.2 mF

MODE

4.7 mF

Figure 52. TPS62232 1.2V Output

OUTPUT FILTER DESIGN (INDUCTOR AND OUTPUT CAPACITOR)

The TPS6223X is optimized to operate with effective inductance values in the range of 0.7μH to 4.3μH and with

effective output capacitance in the range of 2.0μF to 15μF. The internal compensation is optimized to operate

with an output filter of L = 1.0μH/2.2μH and C_OUT= 4.7μF. Larger or smaller inductor/capacitor values can be

used to optimize the performance of the device for specific operation conditions. For more details, see the

CHECKING LOOP STABILITY section.

INDUCTOR SELECTION

The inductor value affects its peak-to-peak ripple current, the PWM-to-PFM transition point, the output voltage

ripple and the efficiency. The selected inductor has to be rated for its dc resistance and saturation current. The

inductor ripple current (ΔI_L) decreases with higher inductance and increases with higher V_{I N}or V_{O UT}. Equation 4

calculates the maximum inductor current under static load conditions. The saturation current of the inductor

should be rated higher than the maximum inductor current as calculated with Equation 5. This is recommended

because during heavy load transient the inductor current will rise above the calculated value.

Vout

1-

Vin

DI_L= Vout ´

L ´ ¦

(4)

DI

L

I

= I

+

Lmax

outmax

2

(5)

With:

f = Switching Frequency

L = Inductor Value

ΔI_L= Peak to Peak inductor ripple current

I_Lmax= Maximum Inductor current

22

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Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

In high-frequency converter applications, the efficiency is essentially affected by the inductor AC resistance (i.e.,

quality factor) and to a smaller extent by the inductor DCR value. To achieve high efficiency operation, care

should be taken in selecting inductors featuring a quality factor above 25 at the switching frequency. Increasing

the inductor value produces lower RMS currents, but degrades transient response. For a given physical inductor

size, increased inductance usually results in an inductor with lower saturation current.

The total losses of the coil consist of both the losses in the DC resistance, R_(DC), and the following

frequency-dependent components:

•

The losses in the core material (magnetic hysteresis loss, especially at high switching frequencies)

Additional losses in the conductor from the skin effect (current displacement at high frequencies)

Magnetic field losses of the neighboring windings (proximity effect)

Radiation losses

The following inductor series from different suppliers have been used with the TPS6223X converters.

Table 1. List of inductors

INDUCTANCE

DIMENSIONS

[mm3]

INDUCTOR TYPE

SUPPLIER

[μH]

1.0/2.2

2.2

2.5 × 2.0 × 1.2

2.0 × 1.2 × 0.55

2.0 × 1.2 × 1.0

2.0 × 2.5 × 1.2

2.0 × 1.2 × 1.0

LQM2HPN1R0MJ0

LQM21PN2R2

MIPSZ2012

Murata

1.0/2.2

FDK

MIPSA2520

FDK

KSLI2012 series

Hitachi Metal

OUTPUT CAPACITOR SELECTION

The unique hysteretic PWM control scheme of the TPS62230 allows the use of tiny ceramic capacitors. Ceramic

capacitors with low ESR values have the lowest output voltage ripple and are recommended. The output

capacitor requires either an X7R or X5R dielectric. Y5V and Z5U dielectric capacitors, aside from their wide

variation in capacitance over temperature, become resistive at high frequencies.

At light load currents the converter operate in Power Save Mode and the output voltage ripple is dependent on

the output capacitor value and the PFM peak inductor current. Higher output capacitor values minimize the

voltage ripple in PFM Mode and tighten DC output accuracy in PFM Mode.

INPUT CAPACITOR SELECTION

Because of the nature of the buck converter having a pulsating input current, a low ESR input capacitor is

required for best input voltage filtering and minimizing the interference with other circuits caused by high input

voltage spikes. For most applications a 2.2μF to 4.7μF ceramic capacitor is recommended. The input capacitor

can be increased without any limit for better input voltage filtering. Because ceramic capacitor loses up to 80% of

its initial capacitance at 5V, it is recommended to use 4.7μF input capacitors for input voltages > 4.5V.

Take care when using only small ceramic input capacitors. When a ceramic capacitor is used at the input and the

power is being supplied through long wires, such as from a wall adapter, a load step at the output or V_INstep on

the input can induce ringing at the VIN pin. This ringing can couple to the output and be mistaken as loop

instability or could even damage the part by exceeding the maximum ratings.

Table 2 shows a list of tested input/output capacitors.

Table 2. List of Capacitor

CAPACITANCE [μF]

SIZE

0402

0603

CAPACITOR TYPE

GRM155R60J225

AMK105BJ475MV

GRM155R60J475

CL05A475MQ5NRNC

GRM188R60J475

SUPPLIER

Murata

2.2

4.7

Taiyo Yuden

Murata

Samsung

Murata

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23

Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

www.ti.com

CHECKING LOOP STABILITY

The first step of circuit and stability evaluation is to look from a steady-state perspective at the following signals:

•

Switching node, SW

Inductor current, I_L

Output ripple voltage, V_OUT(AC)

These are the basic signals that need to be measured when evaluating a switching converter. When the

switching waveform shows large duty cycle jitter or the output voltage or inductor current shows oscillations, the

regulation loop may be unstable. This is often a result of board layout and/or L-C combination.

As a next step in the evaluation of the regulation loop, the load transient response is tested. The time between

the application of the load transient and the turn on of the P-channel MOSFET, the output capacitor must supply

all of the current required by the load. V_OUTimmediately shifts by an amount equal to ΔI_(LOAD)x ESR, where ESR

is the effective series resistance of C_OUT. ΔI_(LOAD)begins to charge or discharge C_Ogenerating a feedback error

signal used by the regulator to return V_OUTto its steady-state value. The results are most easily interpreted when

the device operates in PWM mode.

During this recovery time, V_OUTcan be monitored for settling time, overshoot or ringing that helps judge the

converter’s stability. Without any ringing, the loop has usually more than 45° of phase margin.

Because the damping factor of the circuitry is directly related to several resistive parameters (e.g., MOSFET

r_DS(on)) that are temperature dependant, the loop stability analysis has to be done over the input voltage range,

load current range, and temperature range.

LAYOUT CONSIDERATIONS

As for all switching power supplies, the layout is an important step in the design. Proper function of the device

demands careful attention to PCB layout. Care must be taken in board layout to get the specified performance. If

the layout is not carefully done, the regulator could show poor line and/or load regulation, stability issues as well

as EMI problems. It is critical to provide a low inductance, impedance ground path. Therefore, use wide and

short traces for the main current paths. The input capacitor should be placed as close as possible to the IC pins

as well as the inductor and output capacitor.

Use a common Power GND node and a different node for the Signal GND to minimize the effects of ground

noise. Keep the common path to the GND PIN, which returns the small signal components and the high current

of the output capacitors as short as possible to avoid ground noise. The FB line should be connected to the

output capacitor and routed away from noisy components and traces (e.g. SW line).

Total area

L1

is less than

12mm²

V _IN

C

1

C2

GND

V_OUT

Figure 53. Recommended PCB Layout for TPS6223X

24

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Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

TPS62230, TPS62231, TPS62232, TPS62233

TPS62234, TPS62235, TPS62236, TPS62237

TPS62238, TPS62239, TPS622310, TPS622311

www.ti.com

SLVS941B –APRIL 2009–REVISED DECEMBER 2009

REVISION HISTORY

Changes from Original (April 2009) to Revision A

Page

•

Added device numbers TPS62233, TPS62234, TPS62238, TPS62239, and TPS622310 to the data sheet ...................... 1

Changes from Revision A (August 2009) to Revision B

Page

•

Added device numbers TPS62235, TPS62236, TPS62237, TPS622311 ............................................................................ 1

Changed the Title From: 3 MHz Ultra Small Step Down Converter in 1x1.5 SON Package To: 2 MHz / 3 MHz Ultra

Small Step Down Converter in 1x1.5 SON Package ............................................................................................................ 1

•

Changed Feature: From: 3 MHz switch frequency To: 2 MHz / 3 MHz switch frequency .................................................... 1

Added Figure 8 ..................................................................................................................................................................... 8

Added Figure 9 ..................................................................................................................................................................... 8

Added Figure 10 ................................................................................................................................................................... 8

Added Figure 11 ................................................................................................................................................................... 9

Added Figure 25 ................................................................................................................................................................. 12

Added Figure 26 ................................................................................................................................................................. 12

Added Figure 27 ................................................................................................................................................................. 13

Added Figure 48 ................................................................................................................................................................. 18

Added Figure 49 ................................................................................................................................................................. 18

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25

Product Folder Link(s): TPS62230 TPS62231 TPS62232 TPS62233 TPS62234 TPS62235 TPS62236 TPS62237

TPS62238 TPS62239 TPS622310 TPS622311

PACKAGE OPTION ADDENDUM

www.ti.com

1-Jan-2010

PACKAGING INFORMATION

Orderable Device

TPS62230DRYR

TPS62230DRYT

TPS622310DRYR

TPS622310DRYT

TPS622311DRYR

TPS622311DRYT

TPS62231DRYR

TPS62231DRYT

TPS62232DRYR

TPS62232DRYT

TPS62233DRYR

TPS62233DRYT

TPS62234DRYR

TPS62234DRYT

TPS62235DRYR

TPS62235DRYT

TPS62236DRYR

TPS62236DRYT

TPS62237DRYR

TPS62237DRYT

TPS62238DRYR

TPS62238DRYT

TPS62239DRYR

TPS62239DRYT

Status ⁽¹⁾

ACTIVE

Package Package

Pins Package Eco Plan ⁽²⁾Lead/Ball Finish MSL Peak Temp ⁽³⁾

Qty

Type

Drawing

SON

DRY

6

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

SON

DRY

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

5000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

⁽¹⁾The marketing status values are defined as follows:

Addendum-Page 1

PACKAGE OPTION ADDENDUM

www.ti.com

1-Jan-2010

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

(2)

Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check

http://www.ti.com/productcontent for the latest availability information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements

for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered

at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and

package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS

compatible) as defined above.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame

retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder

temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is

provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the

accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take

reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on

incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited

information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI

to Customer on an annual basis.

Addendum-Page 2

PACKAGE MATERIALS INFORMATION

www.ti.com

8-Dec-2009

TAPE AND REEL INFORMATION

*All dimensions are nominal

Device

Package Package Pins

Type Drawing

SPQ

Reel

A0

B0

K0

P1

W

Pin1

Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant

(mm) W1 (mm)

TPS62230DRYR

TPS62230DRYT

TPS62231DRYR

TPS62231DRYT

TPS62232DRYR

TPS62232DRYT

TPS62233DRYR

TPS62233DRYT

SON

DRY

6

5000

250

179.0

8.4

1.2

1.65

0.7

4.0

8.0

Q1

5000

250

5000

250

5000

250

Pack Materials-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com

8-Dec-2009

*All dimensions are nominal

Device

Package Type Package Drawing Pins

SPQ

Length (mm) Width (mm) Height (mm)

TPS62230DRYR

TPS62230DRYT

TPS62231DRYR

TPS62231DRYT

TPS62232DRYR

TPS62232DRYT

TPS62233DRYR

TPS62233DRYT

SON

DRY

6

5000

250

220.0

205.0

50.0

5000

250

5000

250

5000

250

Pack Materials-Page 2

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,

and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should

obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are

sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.

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Products

Amplifiers

Applications

Audio

Automotive

Broadband

Digital Control

Medical

Military

Optical Networking

Security

amplifier.ti.com

dataconverter.ti.com

www.dlp.com

www.ti.com/audio

Data Converters

DLP® Products

DSP

Clocks and Timers

Interface

www.ti.com/automotive

www.ti.com/broadband

www.ti.com/digitalcontrol

www.ti.com/medical

www.ti.com/military

www.ti.com/opticalnetwork

www.ti.com/security

www.ti.com/telephony

www.ti.com/video

dsp.ti.com

www.ti.com/clocks

interface.ti.com

logic.ti.com

power.ti.com

microcontroller.ti.com

www.ti-rfid.com

Logic

Power Mgmt

Microcontrollers

RFID

Telephony

Video & Imaging

Wireless

RF/IF and ZigBee® Solutions www.ti.com/lprf

www.ti.com/wireless

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265


型号：	TPS622315DRYR
厂家：	TEXAS INSTRUMENTS
描述：	采用 1x1.5 SON 封装、具有 DCS-Control 的 2MHz 超小型降压转换器 \| DRY \| 6 \| -40 to 125 开关 DCS 分布式控制系统控制器开关式稳压器开关式控制器光电二极管电源电路转换器
文件：	总31页 (文件大小：1425K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TPS622315DRYR [TI]

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