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AAT3158 - High Efficiency 1X/1.5X/2X Charge Pump

General Description

The AAT3158 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 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 Drives Up to Four LED Channels No Inductors, Low Noise Operation 1MHz Constant Switching Frequency Small Appl.

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Datasheet Details

Part number AAT3158
Manufacturer AAT
File Size 305.35 KB
Description High Efficiency 1X/1.5X/2X Charge Pump
Datasheet download datasheet AAT3158 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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AAT3158 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description The AAT3158 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. The AAT3158 is capable of driving up to four LED channels 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 VIN and VOUT) make this part ideally suited for small, battery-powered applications.