General Description
The APW7071 is a high frequency step-up DC/DC converter in a small 6-lead SOT-23 package specially designed to drive white LEDs with a constant current. The device can drive up to 4 LEDs in 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 back-lighting.

FEATUREs
• 2.5 V 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
• Up to 87% Efficiency
• Operating Output Capacitor Down to 0.1μF
• Over Voltage Protection Included
• Lead Free and Green Devices Available (RoHS Compliant)

APPLICATIONs
• Cellar Phones White LED Back Light
• PDAs, Handheld Computers
• Digital Still Cameras
• MP3 Players
• GPS Receivers