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Description:High Efficiency 1X/1.5X Charge Pump For White LED Applications
Manufacturer:Advanced Analogic Technologies
Datasheet:PDF (295K).
Click here to download *)

The AAT3151B is a low noise, constant frequency charge pump DC/DC converter that uses a dual mode load switch (1X) and fractional (1.5X) charge pump conversion to maximize efficiency for white LED applications. The AAT3151B is capable of driving four white LEDs at a total of 120mA 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 1F flying capacitors and two small 1F capacitors at VIN and VOUT) makes the AAT3151B ideally suited for small battery-powered applications.

Click here to download AAT3151B Datasheet
Click here to download AAT3151B Datasheet
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