The AAT1235 is a highly integrated, high efficiency powersolution for white LED backlight and keypad backlights inmobile/portable devices. It is based on a switching boostconverter which steps up the single-cell lithium-ion/polymerbattery voltage to drive 5 strings of series-connectedwhite LEDs with precision current regulation. The AAT1235is capable of driving a total of four LEDs per channel.