The AAT3113 and AAT3114/14A are low noise, constant frequency charge pump DC/DC converters that use frac-tional (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, bat-tery-powered applications.

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