SW

C1

10 µF

L1

4.7 µH

VBAT

VOUT

FB

C2

10 µF

EN

GND

TPS61070

3.3VUp To

100mA

R1

R2

TPS61070-Q1, TPS61071-Q1

TPS61072-Q1, TPS61073-Q1

www.ti.com

SLVSAA5 – MAY 2010

90% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 600-mA SWITCH

1

FEATURES

•

Qualified for Automotive Applications

•

Input Voltage Range: 0.9 V to 5.5 V

•

90% Efficient Synchronous Boost Converter

•

Adjustable Output Voltage Up to 5.5 V

–

75-mA Output Current at 3.3 V From 0.9-V

•

Power-Save Mode Version Available for

Input

Improved Efficiency at Low Output Power

–

150-mA Output Current at 3.3 V From 1.8-V

•

Load Disconnect During Shutdown

Input

•

Overtemperature Protection

•

Device Quiescent Current: 19 µA (Typ)

•

Small 6-Pin Thin SOT23 Package

DESCRIPTION

The TPS6107x devices provide a power supply solution for products powered by either a one-cell, two-cell, or

three-cell alkaline, NiCd or NiMH, or one-cell Li-ion or Li-polymer battery. Output currents can go as high as 75

mA while using a single-cell alkaline, and discharge it down to 0.9 V. It can also be used for generating 5 V at

200 mA from a 3.3 V rail or a Li-ion battery. The boost converter is based on a fixed frequency,

pulse-width-modulation (PWM) controller using a synchronous rectifier to obtain maximum efficiency. At low load

currents the TPS61070 and TPS61073 enter the power-save mode to maintain a high efficiency over a wide load

current range. The power-save mode is disabled in the TPS61071 and TPS61072, forcing the converters to

operate at a fixed switching frequency. The maximum peak current in the boost switch is typically limited to a

value of 600 mA.

The TPS6107x output voltage is programmed by an external resistor divider. The converter can be disabled to

minimize battery drain. During shutdown, the load is completely disconnected from the battery. The device is

packaged in a 6-pin thin SOT23 package (DDC).

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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.

UNLESS

OTHERWISE

NOTED

this

document

contains

Copyright © 2010, Texas Instruments Incorporated

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.