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Description:High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Manufacturer:Advanced Analogic Technologies
Datasheet:PDF (483K).
Click here to download *)

The AAT3140 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications. The device produces current levels up to 30mA on each of its four current source outputs to drive various arrangements of LEDs from a 2.7V to 5.5V input. Outputs 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 CP) make the AAT3140 ideally suited for small battery-powered applications.

Click here to download AAT3140 Datasheet
Click here to download AAT3140 Datasheet
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