AAT3113

DATA SHEET AAT3113/3114 High Efficiency 1.5X Fractional Charge Pumps for White LED Applications General Description The AAT3113 and AAT3114 are low noise, constant frequency charge pump DC/DC converters that use fractional (1.5X) conversion to increase efficiency in white LED applications. The devices can be used to produce current levels up to 20mA for each output from a 2.7V to 5.5V input. A low external parts count (two 1μF flying capacitors and two small bypass capacitors at VIN and OUT) makes these devices ideally suited for small, battery-powered applications. Skyworks' Simple Serial Control (S2Cwire™) interface is used to enable, disable, and set the LED drive current for 32-level logarithmic scale LED brightness control. AAT3113 and AAT3114 devices have a thermal management system for protection in the event of a short-circuit condition on any of the output pins. Built-in soft-start circuitry prevents excessive inrush current during startup. A high switching frequency enabl...