The AAT3155 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.
Key Features
VIN Range: 2.7V to 5.5V.
Fully Programmable Current with Single Wire.
16 Current Levels.
Four Low Current Settings Down to 50µA.
Low IQ (50µA) for Low Current Mode.
Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum
Efficiency and VF Coverage.
Full PDF Text Transcription for AAT3155 (Reference)
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DATA SHEET AAT3155 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description The AAT3155 is a low noise, constant frequency charge pump DC/DC ...
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tion The AAT3155 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 AAT3155 is capable of driving up to four channels of LEDs at 20mA per channel 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.
AAT3155 Datasheet
