PS1541
High Efficiency
Step Up DC/DC Converter
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.
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.
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
July 2007
www.picsemi.com
© 2007 Power IC. All Rights Reserved.
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