DESCRIPTION
The LTC®3214 is a low noise, high current charge pump DC/DC converter capable of driving high current LEDs at up to 500mA from a 2.9V to 4.5V input. Low external parts count (two flying capacitors, one programming resistor and two bypass capacitors at VIN and CPO) make the LTC3214 ideally suited for small, battery-powered applications.

FEATURES
■ Low Noise Constant Frequency Operation
■ High Effi ciency: Up to 94%
■ Multi-Mode Operation: 1x, 1.5x or 2x Boost Modes
■ Automatic Mode Switching
■ High Output Current: Up to 500mA
■ Tiny Application Circuit (3mm × 3mm DFN Package,
   All Components <1mm High)
■ Automatic Soft-Start
■ Output Disconnect
■ Open, Shorted LED Protection
■ No Inductors
■ Internal 110mΩ LED Current Sense Resistor
■ 3mm × 3mm 10-Lead DFN Package

APPLICATIONS
■ LED Torch/Camera Light Supply for Cell Phones, PDAs and Digital Cameras
■ General Lighting and/or Flash/Strobe Applications