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.
Key Features
VIN Range: 2.7V to 5.5V.
Fully Programmable Current with Single Wire.
16-Step Logarithmic Scale.
15/20/30mA Max Current.
Four Low-Current Settings Down to 50µA.
Low IQ (50µA) for Low-Current Mode.
Dual Mode 1X and 1.5X Charge Pump for Maximum Efficiency and VF Coverage.
Full PDF Text Transcription for AAT3151B (Reference)
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AAT3151B. For precise diagrams, and layout, please refer to the original PDF.
DATA SHEET AAT3151B High Efficiency 1X/1.5X Charge Pump For White LED Applications General Description The AAT3151B is a low noise, constant frequency charge pump DC/DC c...
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on 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 1µF flying capacitors and two small 1µF capacitors at VIN and VOUT) makes the AAT3151B ideally suited for small battery-powered applications.
AAT3151B Datasheet
