The AAT3167 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.
Key Features
ChargePump™.
VIN Range: 2.7V to 5.5V Fully Programmable Current with Single Wire.
16-Step Logarithmic Scale.
14/18/27mA Max Current.
Four Low-Current Settings Down to 115µA.
Low IQ (50µA) for Single-Channel, LowCurrent Mode Tri-Mode 1X, 1.5X, 2X Charge Pump for Maximum Efficiency and VF Coverage Drives Up to Five LEDs Individual M.
Full PDF Text Transcription for AAT3167 (Reference)
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High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description The AAT3167 is a low noise, constant frequency charge pump DC/DC converter that uses...
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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 AAT3167 is capable of driving five LEDs for a total of 135mA 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 IN and OUTCP) make this part ideally suited for small, battery-powered applications.
AAT3167 Datasheet
