General Description

The APW7071 is a high frequency step up DC/DC converter in a small 6 leads SOT-23 package specially designed to drive white LEDs with a constant current. The device can drive up to 4 LEDS in a series from one Li-Ion cell. The APW7071 is ideal for LCD panels requiring low current and high efficiency as well as white LED applications for cellular phone backlighting.

Features

• 2.4V to 6V Input Voltage Range

• 400mA, Internal Switch Current

• Up to 1MHz Switching Frequency

• 70μA Typical No Load Quiescent Current

• 0.1μA Typical Shutdown Current

• Internal Soft-start

• Available in a Tiny 6-Pin SOT-23 Package

• Up to 87 efficiency

• Operating Output Capacitor down to 0.1μF

• Over Voltage Protection included

• Lead FreeAvailable (RoHS Compliant)

Applications

• Cellar Phones White LED Back Light

• PDAs, Handheld Computers

• Digital Still Cameras

• MP3 Players

• GPS Receivers