AAT2801

Multi-Mode Charge Pump for White LED Backlight and Flash Applications General Description The AAT2801 is a member of AnalogicTech's Total Power Management IC™ (TPMIC™) product family. It has a dual charge pump architecture designed to support both the white LED backlight and flash applications for systems operating with Lithium-Ion batteries. The backlight charge pump provides power required to drive up to four LEDs. To maximize power efficiency, it automatically selects 1X, 1.5X, or 2X mode. The device produces current levels up to 30mA on each of its four current source outputs. AnalogicTech's Simple Serial Control™ (S2Cwire™) interface is used to enable, disable, and set the LED drive current with a 32-level logarithmic scale LED brightness control. The flash charge pump is a charge pump doubler with a regulated output voltage. It is designed to deliver 120mA of continuous current and up to 250mA of pulsed current. It has an independent enable pin for improved power savings. AAT2801 Features ChargePump™ VIN Range: 2.7V to 5.5V Dual Charge Pump — Flash: Charge Pump Doubler — Backlight: Tri-Mode Charge Pump Drives Low-VF and High-VF LEDs Up to Four 30mA Outputs 32-Position Logarithmic Scale with Digital Control Low Noise Constant Frequency Operation 1MHz Switching Frequency AutoBias Technology Regulated 4.5/5.0 Volts VOUT_FLASH Up to 250mA of Current for Flash Automatic Soft Start No Inductors IQ <1µA in Shutdown Available in 16-pin TDFN44 Pac...