1

FEATURES

APPLICATIONS

DESCRIPTION

L1

VIN

VINA

EN

PS/SYNC

GND

L2

VOUT

FB

PGND

L1

1.5µH

C2

10µF

C1

4.7µF

1.8Vto

5.5V

3.3Vupto

800mA

TPS63031

TPS63030

TPS63031

HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 1-A SWITCHES

• All Two-Cell and Three-Cell Alkaline, NiCd or

2

• Up to 96% Efficiency

NiMH or Single-Cell Li Battery Powered

• 800-mA Output Current at 3.3V in Step Down

Products

Mode (VIN = 3.6V to 5.5V)

• Portable Audio Players

• Up to 500-mA Output Current at 3.3V in Boost

• PDAs

Mode (VIN > 2.4V)

• Cellular Phones

• Automatic Transition Between Step Down and

• Personal Medical Products

Boost Mode

• White LEDs

• Device Quiescent Current less than 50µA

• Input Voltage Range: 1.8V to 5.5V

• Fixed and Adjustable Output Voltage Options

The TPS6303x devices provide a power supply

from 1.2V to 5.5V

solution for products powered by either a two-cell or

• Power Save Mode for Improved Efficiency at

three-cell alkaline, NiCd or NiMH battery, or a

Low Output Power

one-cell Li-Ion or Li-polymer battery. Output currents

can go as high as 600 mA while using a single-cell

• Forced Fixed Frequency Operation and

Li-Ion or Li-Polymer Battery, and discharge it down to

Synchronization Possible

2.5V or lower. The buck-boost converter is based on

• Load Disconnect During Shutdown

a fixed frequency, pulse-width-modulation (PWM)

• Over-Temperature Protection

controller using synchronous rectification to obtain

maximum

efficiency.

At

low

load

currents,

the

• Available in Small 2,5-mm × 2,5-mm, QFN-10

converter enters Power Save mode to maintain high

Package

efficiency over a wide load current range. The Power

Save mode can be disabled, forcing the converter to

operate at a fixed switching frequency. The maximum

average current in the switches is limited to a typical

value

of

1000

mA.

The

output

voltage

is

programmable using an external resistor divider, or is

fixed internally on the chip. The converter can be

disabled to minimize battery drain. During shutdown,

the load is disconnected from the battery. The device

is packaged in a 10-pin QFN PowerPAD™ package

measuring 2.5 mm × 2.5 mm (DSK).

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.

2

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2009, 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.