The LTC3214 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. Built-in soft-start circuitry prevents excessive inrush cur- rent during start-up. High switching frequency enables the use of small external capacitors. Output current level is programmed by an external resis- tor. LED current is regulated using an internal 110mΩ sense resistor. Automatic mode switching optimizes effi- ciency by monitoring the voltage across the charge pump and switching modes only when dropout is detected. The part is available in a low profile 3mm x 3mm 10-lead DFN package.