General Description

The MIC2287C 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  37V  and  a  switch current  of  over  500mA,  the MIC2287C easily drives a string of up to 6 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

•  Over-temperature protection

•  UVLO

•  Low profile Thin SOT-23-5 package option

•  8-lead 2mm × 2mm MLF™ package option

•  –40°C to +105°C junction temperature range

•  For higher performance specifications see the MIC2287

Applications

•  White LED driver for backlighting:

  - Cell phones

 - PDAs

  - GPS systems

  - Digital cameras

  - MP3 players

  - IP phones

•  LED flashlights