DESCRIPTION
The LT® 3465 is a step-up DC/DC converter designed to drive up to six LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents and eliminates the need for ballast resistors. This device integrates the Schottky diode required externally on competing devices. Additional features include output voltage limiting when LEDs are disconnected, one-pin shutdown and dimming control, and internal soft-start.

FEATURES
■ Inherently Matched LED Current
■ Drives Up to Six LEDs from a 3.6V Supply
■ No External Schottky Diode Required
■ Automatic Soft-Start
■ Open LED Protection
■ High Efficiency: 81% Typical
■ Requires Only 0.22µF Output Capacitor
■ Low Profile (1mm) SOT-23 Packaging

APPLICATIONS
■ Cellular Phones
■ PDAs, Handheld Computers
■ Digital Cameras
■ MP3 Players
■ GPS Receivers