AAT3152

DATA SHEET AAT3152 High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General 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. A low external parts count (two 1µF flying capacitors and two small 1µF capacitors at VIN and VOUT) makes this part ideally suited for small, battery-powered applications. Skyworks’ S2Cwire™ (Simple Serial Control) serial digital input is used to enable, disable, and set current for each LED with eight settings (20mA down to 50µA) including main/sub-display group control. The AAT3152 consumes extremely low current internally (50µA typical) at light load for optimized efficiency. Each output of ...