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FEATURES

DESCRIPTION

APPLICATIONS

GND

EN

SW

FB

C3

4.7 F

m

L1

4.7 H

m

C4

10 F

m

TPS62220

2.5 V to 6 V

1.5 V/400 mA

R1

360 kW

R2

180 kW

C1

22 pF

C2

100 pF

1

2

3

5

4

40

45

50

55

60

65

70

75

80

85

90

95

100

0.01

0.1

1

10

100

1000

L = 4.7 H,

m

m

Typical Application (Adjustible Output Voltage Version)

TPS62220, TPS62221, TPS62222

TPS62223, TPS62224, TPS62227

TPS62228, TPS62229

SLVS491D – SEPTEMBER 2003 – REVISED MARCH 2006

400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23

•

High-Efficiency Synchronous Step-Down

The TPS6222x devices are a family of high-efficiency,

Converter With up to 95% Efficiency

synchronous step-down converters ideally suited for

portable systems powered by 1-cell Li-Ion or 3-cell

•

2.5-V to 6-V Input Voltage Range

NiMH/NiCd batteries. The devices are also suitable to

•

Adjustable Output Voltage Range From 0.7 V

operate from a standard 3.3-V or 5-V voltage rail.

With an output voltage range of 6 V down to 0.7 V

•

Fixed Output Voltage Options Available

and up to 400-mA output current, the devices are

•

Up to 400-mA Output Current

ideal for powering the low voltage TMS320™ DSP

•

1.25-MHz Fixed Frequency PWM Operation

family and processors used in PDAs, pocket PCs,

and smart phones. Under nominal load current, the

•

Highest Efficiency Over Wide Load Current

devices operate with a fixed switching frequency of

Range Due to Power-Save Mode

typically 1.25 MHz. At light load currents, the part

•

15-µA Typical Quiescent Current

enters the power-save mode operation; the switching

•

Soft Start

frequency is reduced and the quiescent current is

typically only 15 µA; therefore, the device achieves

•

100% Duty Cycle Low-Dropout Operation

the highest efficiency over the entire load current

•

Dynamic Output-Voltage Positioning

range.

The

TPS6222x

needs

only

three

small

•

Available in TSOT23 Package

external components. Together with the tiny TSOT23

package, a minimum system solution size can be

achieved. An advanced fast response voltage mode

control scheme achieves superior line and load

•

PDAs and Pocket PC

regulation with small ceramic input and output

•

Cellular Phones, Smart Phones

capacitors.

•

OMAP™ and Low Power DSP Supply

•

Digital Cameras

•

Portable Media Players

•

Portable Equipment

•

WLAN PC Cards

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.

OMAP, TMS320 are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2003–2006, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.