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

• 1µA 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