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AAT3156
High Efficiency 1X/1.
5X/2X Charge Pump For White LED Applications General Description
The AAT3156 is a low noise, constant frequency charge pump DC/DC converter that uses a trimode load switch (1X), fractional (1.
5X), and doubling (2X) conversion to maximize efficiency for white LED applications.
The AAT3156 is capable of driving six-channel LEDs at a total of 180mA from a 2.
7V to 5.
5V input.
The current sinks may be operated individually or in parallel for driving higher-current LEDs.
A low external parts count (two 1µF flying
capacitors and two small 1µF
capacitors at VIN and VOUT) make this part ideally suited for small battery-powered applications.
AnalogicTe...