FEATURES

On Board Power MOSFET

Uses Tiny Capacitor And Inductors

12V at 150mA from 5V input

Up to 92% Efficiency

Operates with Input Voltage as Low as 2.5V

and Output Voltage as High as 22V

620KHz Fixed Switching Frequency

Low 1.1V Feedback Voltage

Soft Start

UVLO, Thermal Shutdown

Internal Current Limit

Available in SOT-26 packages.

APPLICATIONS

Cell Phones

Handheld Computers and PDAs.

Camera Phone Flash

Small LCD Displays

Digital Still and Video Cameras

White LED Driver

External Modems

DESCRIPTION

The PS1541 is a current mode step up converter

intended for small, low power applications. The

PS1541 switches over 600KHz and allows the use of

tiny, low cost capacitors and inductors. Internal soft

start results in small inrush current and extends

battery life. The PS1541 operates from an input

voltage as low as 2.5V and can generate 12V at up

to 150mA from a 5V supply.

The PS1541 includes under-voltage lockout, current

limiting and thermal overload protection preventing

damage in the event of an output overload. The

PS1541 is available in small 6-pin SOT-26 package.

TYPICAL APPLICATION CIRCUIT

High Efficiency

Step Up DC/DC Converter

PS1541

July 2007

www.picsemi.com

© 2007 Power IC. All Rights Reserved.

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