General Description

The MIC2292 and MIC2293 are high frequency, Pulse Width Modulator (PWM) boost regulators optimized for constant current, white LED driver applications. Because of their constant PWM switching frequencies of 1.6MHz and 2MHz, respectively, the MIC2292/93 can use the smallest external components, allowing designers to avoid sensitive IF bands in their RF applications.

Features

• 2.5V to 10V input voltage

• Output voltage up to 34V

• Internal Schottky diode

• 1.6MHz PWM operation (MIC2292)

• 2.0MHz PWM operation (MIC2293)

• Stable with ceramic capacitors

• 15V and 34V output overvoltage protection options

• 500mA switch current rating

• 95mV feedback voltage

• <1 line and load regulation

• <1µA shutdown current

• Over-temperature protection

• UVLO

• 8-lead (2mm × 2mm) 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

• Constant current power supplies