General Description

The MIC2289 is a PWM (pulse width modulated), boost switching regulator that is optimized for constant-current white LED driver applications. The MIC2289 features an internal Schottky diode and three levels of output overvoltage protection providing a small size and efficient DC/DC solution that requires only four external components.

Features

• 2.5V to 10V input voltage

• Output voltage up to 34V

• Internal Schottky diode

• 15V, 24V, 34V output OVP options

• 1.2 MHz PWM operation

• Over 500mA switch current

• 95mV feedback voltage

• <1 line and load regulation

• <1µA shutdown current

• Overtemperature protection

• UVLO

• 2mm × 2mm 8-pin MLF® package

• –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

• LED flashlights

• Constant current power supplies