AAT2869 Overview
The AAT2869 is a low-noise, constant-frequency charge pump DC/DC converter that uses a dual-mode load switch (1x) and fractional (1.5x) conversion to maximize efficiency for white LED applications. The AAT2869 is capable of driving 4 white LEDs at a total of 124mA from a 2.7V to 5.5V input. The current sinks may be operated individually or in parallel for driving higher-current LEDs.
AAT2869 Key Features
- 2.7V to 5.5V Supply Voltage Range
- Charge Pump for LED Driver
- Dual Mode 1x/1.5x
- Drives up to 4 LEDs with up to 31mA each
- Linear LED Output Control Options
- Maximum LED Current Set by AS2Cwire Interface, 32 Steps
- Fade In and Fade Out
- 0.9MHz Constant Frequency
- Automatic Soft-Start Limits Inrush Current
- Dual 150mA LDOs
AAT2869 Applications
- 2.7V to 5.5V Supply Voltage Range
- Charge Pump for LED Driver