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FEATURES

DESCRIPTION

APPLICATIONS

SW

C1

10 µF

L1

4.7 µH

VBAT

VOUT

FB

C2

10 µF

EN

GND

TPS61070

3.3VUp To

100mA

R1

R2

TPS61070, TPS61071

TPS61072, TPS61073

SLVS510A – JULY 2006 – REVISED JANUARY 2007

90% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 600-mA SWITCH

• 90% Efficient Synchronous Boost Converter

The TPS6107x devices provide a power supply

solution for products powered by either a one-cell,

–

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

two-cell, or three-cell alkaline, NiCd or NiMH, or

Input

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

–

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

can go as high as 75 mA while using a single-cell

Input

alkaline, and discharge it down to 0.9 V. It can also

• Device Quiescent Current: 19 µA (Typ)

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

• Input Voltage Range: 0.9 V to 5.5 V

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

• Adjustable Output Voltage Up to 5.5 V

controller using a synchronous rectifier to obtain

• Power-Save Mode Version Available for

maximum

efficiency.

At

low

load

currents

the

Improved Efficiency at Low Output Power

mode to maintain a high efficiency over a wide load

• Load Disconnect During Shutdown

current range. The power-save mode is disabled in

• Overtemperature Protection

the TPS61071 and TPS61072, forcing the converters

• Small 6-Pin Thin SOT23 Package

to operate at a fixed switching frequency. The

maximum peak current in the boost switch is typically

limited to a value of 600 mA.

• All One-Cell, Two-Cell, and Three-Cell

The TPS6107x output voltage is programmed by an

Alkaline, NiCd or NiMH or Single-Cell Li

external resistor divider. The converter can be

Battery-Powered Products

disabled to minimize battery drain. During shutdown,

• Portable Audio Players

the load is completely disconnected from the battery.

The device is packaged in a 6-pin thin SOT23

• PDAs

package (DDC).

• Cellular Phones

• Personal Medical Products

• White LED Lighting

(1)

TPS61073 is in Product Preview status.

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 © 2006–2007, 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.