AAT3177

DATA SHEET AAT3177 High Current, High Efficiency Charge Pump with Auto-Timer General Description The AAT3177 is a high output current, high efficiency, low noise, low profile charge pump DC/DC converter. The device is ideal for multi-functional LED photo-flash applications where solution cost, size, and efficiency are critical. The AAT3177 is capable of driving a regulated output current up to 800mA. Output current levels can be easily programmed in 16 steps through Skyworks’ Simple Serial Control™ (S2Cwire™) interface controlled by a single microcontroller GPIO line. This allows smooth transitions and flexible adjustment of brightness in flash or other lighting modes. The maximum output current can also be set with an external RSET resistor. The tri-mode (1X/1.5X/2X) operation of the internal charge pump offers excellent power efficiency throughout the output current range for both flash and movie modes. Combined with a low external parts count (two 1μF flying capacitors and t...