(3,25 mm x 3,25 mm)

www.ti.com

FEATURES

DESCRIPTION

APPLICATIONS

SW

C1

10

µF

L1

6.8

µH

R1

R2

VBAT

VOUT

FB

C2

2.2

µF

C3

47

µF

LBO

PGND

LBI

PS

EN

GND

TPS61020

3.3 V Up To

200 mA

Low Battery

Output

R3

R4

R5

0.9-V To

6.5-V Input

TPS61020

,, TPS61024,, TPS61025

TPS61026, TPS61027, TPS61028

TPS61029

SLVS451D – SEPTEMBER 2003 – REVISED FEBRUARY 2006

96% EFFICIENT SYNCHRONOUS BOOST CONVERTER

• 96% Efficient Synchronous Boost Converter

The TPS6102x devices provide a power supply

solution for products powered by either a one-cell,

• Output Voltage Remains Regulated When

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

Input Voltage Exceeds Nominal Output

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

Voltage

can go as high as 200 mA while using a single-cell

• Device Quiescent Current: 25 µA (Typ)

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

• Input Voltage Range: 0.9 V to 6.5 V

be used for generating 5 V at 500 mA from a 3.3-V

rail or a Li-Ion battery. The boost converter is based

• Fixed and Adjustable Output Voltage Options

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

Up to 5.5 V

controller using a synchronous rectifier to obtain

• Power Save Mode for Improved Efficiency at

maximum

efficiency.

At

low

load

currents

the

Low Output Power

converter enters the Power Save mode to maintain a

• Low Battery Comparator

high efficiency over a wide load current range. The

Power Save mode can be disabled, forcing the

• Low EMI-Converter (Integrated Antiringing

converter to operate at a fixed switching frequency.

Switch)

The maximum peak current in the boost switch is

• Load Disconnect During Shutdown

limited to a value of 800 mA, 1500 mA or 1800mA

• Over-Temperature Protection

depending on the device version.

• Small 3 mm × 3 mm QFN-10 Package

The TPS6102x devices keep the output voltage

regulated even when the input voltage exceeds the

nominal output voltage. The output voltage can be

programmed by an external resistor divider, or is

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

fixed internally on the chip. The converter can be

NiCd or NiMH or Single-Cell Li Battery

disabled to minimize battery drain. During shutdown,

Powered Products

the load is completely disconnected from the battery.

• Portable Audio Players

A low-EMI mode is implemented to reduce ringing

• PDAs

and, in effect, lower radiated electromagnetic energy

• Cellular Phones

when

the

converter

enters

the

discontinuous

conduction mode. The device is packaged in a

• Personal Medical Products

10-pin QFN PowerPAD™ package measuring 3 mm

• Camera White LED Flash Light

x 3 mm (DRC).

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.

PowerPAD is a trademark 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.