R4

1 M

C1

10 µF

C

22 µF

OUT

SW

VIN

EN

ILIM

GND

VOUT

FB

PG

R

20 k

ILIM

C

100 pF

FF

V

IN

R2

243 k

L1

1 H

R1

768 k

V

OUT

TPS61252

Power Good

Output

2.3 V to 6.0 V

5.0 V

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

TPS61252

SLVSAG3A – SEPTEMBER 2010 – REVISED DECEMBER 2014

TPS61252 Tiny 1.5-A Boost Converter With Adjustable Input Current Limit

1 Features

3 Description

The TPS61252 device provides a power supply

1

•

Resistor Programmable Input Current Limit

solution for products powered by either a three-cell

–

±20% Current Accuracy at 500 mA over Full

alkaline, NiCd or NiMH battery, or an one-cell Li-Ion

Temperature Range

or Li-polymer battery. The wide input voltage range is

–

Programmable from 100 mA up to 1500 mA

ideal to power portable applications like mobile

phones or computer peripherals. The device has a

•

Up to 92% Efficiency

•

is suitable for a wide variety of applications.

•

Power Good Indicates Appropriate Output Voltage

During light loads, the device automatically enters

Level

skip mode (PFM), which allows the converter to

•

Adjustable Output Voltage up to 6.5 V

maintain the required output voltage, while only

•

drawing 30

μA quiescent current from the battery.

This allows maximum efficiency at lowest quiescent

•

Load Disconnect and Reverse Current Protection

currents.

•

Short Circuit Protection

TPS61252 allows the use of small inductors and

•

Typical Operating Frequency 3.25 MHz

capacitors to achieve a small solution size. The

•

Available in a 2-mm × 2-mm WSON-8 Package

possibility to reduce the current limit by a external

resistor offers the potential use of physically even

2 Applications

smaller inductors with lower rated currents to further

reduce total solution sizes of the power supply.

•

USB Host Supplies from a Single Li-Ion Battery

During shutdown, the load is completely disconnected

•

Current Limited Applications

from the battery. The TPS61252 is available in a 8-

•

Li-Ion Applications

pin WSON package measuring 2 mm × 2 mm (DSG).

•

Audio Applications

Device Information(1)

•

RF-PA Buffer

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS61252

WSON (8)

2.00 mm x 2.00 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

4 Typical Application Schematic

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.