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FEATURES

DESCRIPTION

APPLICATIONS

TYPICAL APPLICATION

SYNC

GND

PGND

SW

V

O

=3.3V

6.8

H

m

C

=22

F

6.3V

O

m

VIN

LBI

C =10

F

25V

I

m

1

F

m

V =3.8Vto17V

I

VIN

EN

VINA

PGND

GND PwPD

AGND

TPS62111

SW

LBO

PG

1MW

FB

TPS62111

EfficiencyvsOutputCurrent

100

0

90

70

40

20

80

50

60

30

10

0.0001

0.001

0.01

0.1

10

1

I

-OutputCurrent- A

O

5V

4.2V

12V

8.4V

V

=3.3V

T

PFMMode

O

o

TPS62110, TPS62111

TPS62112, TPS62113

17-V, 1.5-A, SYNCHRONOUS STEP-DOWN CONVERTER

• High-Efficiency Synchronous Step-Down

The TPS6211x devices are a family of low-noise

Converter With up to 95% Efficiency

synchronous step-down dc-dc converters that are

ideally suited for systems powered from a 2-cell Li-ion

• 3.1-V to 17-V Operating Input Voltage Range

battery or from a 12-V or 15-V rail.

• Adjustable Output Voltage Range From

The TPS6211x is a synchronous PWM converter with

1.2 V to 16 V

integrated

N-

and

P-channel

power

MOSFET

• Fixed Output Voltage Options Available in

switches.

Synchronous

rectification

is

used

to

3.3 V and 5 V

increase efficiency and to reduce external component

• Synchronizable to External Clock Signal up to

count. To achieve highest efficiency over a wide

1.4 MHz

load-current

range,

the

converter

enters

a

power-saving,

pulse-frequency

modulation

(PFM)

• Up to 1.5-A Output Current

mode at light load currents. Operating frequency is

• High Efficiency Over a Wide Load-Current

typically 1 MHz, allowing the use of small inductor

Range Due to PFM/PWM Operation Mode

and

capacitor

values.

The

device

can

be

• 100% Maximum Duty Cycle for Lowest

synchronized to an external clock signal in the range

Dropout

of 0.8 MHz to 1.4 MHz. For low-noise operation, the

converter can be operated in PWM-only mode. In the

• 20-µA Quiescent Current (Typical)

shutdown mode, the current consumption is reduced

• Overtemperature and Overcurrent Protected

to less than 2 µA. The TPS6211x is available in the

• Available in 16-Pin QFN Package

16-pin (RSA) QFN package, and operates over a

free-air temperature range of –40°C to 85°C.

• Point-of-Load Regulation From 12-V Bus

• Organizers, PDAs, and Handheld PCs

• Handheld Scanners

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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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2009, 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.