AAT3156 Description
The AAT3156 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 AAT3156 is capable of driving six-channel LEDs at a total of 180mA from a 2.7V to 5.5V input. The current sinks may be operated individually or in parallel for driving higher-current LEDs.
AAT3156 Key Features
- ChargePump™
- 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 Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and VF Coverage Drives S