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General Description

The MIC2289 is a PWM (pulse width modulated), boost switching regulator that is optimized for constant-current white LED driver applications. The MIC2289 features an internal Schottky diode and three levels of output overvoltage protection providing a small size and efficient DC/DC solution that requires only four external components.

Features

? 2.5V to 10V input voltage

? Output voltage up to 34V

? Internal Schottky diode

? 15V, 24V, 34V output OVP options

? 1.2 MHz PWM operation

? Over 500mA switch current

? 95mV feedback voltage

? <1 line and load regulation

? <1?A shutdown current

? Overtemperature protection

? UVLO

? 2mm × 2mm 8-pin MLF? package

? –40°C to +125°C junction temperature range

Applications

? White LED driver for backlighting:

– Cell phones

– PDAs

– GPS systems

– Digital cameras

– MP3 players

– IP phones

? LED flashlights

? Constant current power supplies