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

• <1µA 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