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General Description

The MIC2291 is a 1.2MHz Pulse Width Modulation (PWM), boost-switching regulator that is optimized for high-current, white LED photo flash applications. With a guaranteed switch current of 1.2A, the MIC2291 easily drives a string of 3 white LEDs in series at 100mA, ensuring a high level of brightness and eliminating several ballast resistors.

Features

? 2.5V to 10V input voltage

? Output voltage up to 34V

? 1.2A switch current

? 1.2MHz PWM operation

? 95mV feedback voltage

? Overvoltage protection (OVP)

– Options for 15V and 34V

? Stable with ceramic capacitors

? <1 line and load regulation

? 1?A shutdown current

? Over temperature protection

? UVLO

? Low-profile Thin SOT23-5 package option

? 2mm × 2mm MLF? package option

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

Applications

? Photo Flash LED driver

? Cell phones

? PDAs

? GPS systems

? Digital cameras

? IP phones

? LED flashlights