DESCRIPTION

The MP1542 is a current mode step up converter with a 2A, 0.18Ω internal switch to provide a highly efficient regulator with fast response. The MP1542 can be operated at 700KHz or 1.3MHz allowing for easy filtering and low noise. An external compensation pin gives the user flexibility in setting loop dynamics, which allows the use of small, lowESR ceramic output capacitors. Soft-start results in small inrush current and can be programmed with an external capacitor. The MP1542 operates from an input voltage as low as 2.5V and can generate 12V at up to 500mA from a 5V supply.

FEATURES

• 2A, 0.18Ω, 25V Power MOSFET

• Uses Tiny Capacitors and Inductors

• Pin Selectable 700KHz or 1.3MHz Fixed Switching Frequency

• Programmable Soft-Start

• Operates with Input Voltage as Low as 2.5V and Output Voltage as High as 22V

• 12V at 500mA from 5V Input

• UVLO, Thermal Shutdown

• Internal Current Limit

• Available in 8-Pin MSOP Packages

APPLICATIONS

• LCD Displays

• Portable Applications

• Handheld Computers and PDAs

• Digital Still and Video Cameras