The ADM8832 is a charge pump regulator used for color thinfilm transistor (TFT) liquid crystal displays (LCD). Using chargepump technology, the device can be used to generate threeoutput voltages (+5.1 V ±2%, +15.3 V, −10.2 V) from a single3 V input supply. These outputs are then used to providesupplies for the LCD controller (+5.1 V) and the gate drives forthe transistors in the panel (+15.3 V and −10.2 V). Only a fewexternal capacitors are needed for the charge pumps. Anefficient low dropout voltage regulator also ensures that thepower efficiency is high and provides a low ripple 5.1 V output.This LDO can be shut down and an external LDO used toregulate the 5 V doubler output and drive the input to thecharge pump section, which generates the +15.3 V and −10.2 V.