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General Description

The MIC2287 is a 1.2MHz pulse width modulated (PWM), boost-switching regulator that is optimized for constant current, white LED driver applications. With a maximum output voltage of 34V and a switch current of over 500mA, the MIC2287 easily drives a string of up to 8 white LEDs in series, ensuring uniform brightness and eliminating several ballast resistors.

Features

? 2.5V to 10V input voltage

? Output voltage up to 34V

? Over 500mA switch current

? 1.2 MHz PWM operation

? 95mV feedback voltage

? Output Overvoltage Protection (OVP)

? Options for 15V, 24V, and 34V OVP

? <1 line and load regulation

? <1?A shutdown current

? Over-temperature protection

? UVLO

? Low profile Thin SOT-23-5 package option

? 8-lead 2mm × 2mm MLF? package option

? –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

? Photo flash LED driver

? LED flashlights

? Constant current power supplies