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