AAT3152 Description
The AAT3152 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 AAT3152 is capable of driving four-channel LEDs from a 2.7V to 5.5V input. The current sinks may be operated individually or in parallel for driving higher-current LEDs.
AAT3152 Key Features
- VIN Range: 2.7V to 5.5V
- Fully Programmable Current with Single Wire
- Eight-Step Current: 20mA to 50µA
- Individual Main-Sub Group Control
- Low IQ (50µA) at Light Load
- Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and VF Coverage
- Drives 1-4 Channels of LEDs
- No Inductors, Low Noise Operation
- 1MHz Constant Switching Frequency
- Small Application Circuit
AAT3152 Applications
- VIN Range: 2.7V to 5.5V
- Fully Programmable Current with Single Wire
- Eight-Step Current: 20mA to 50µA