The ADD8754 is optimized for use in TFT LCD applications, requiring only external charge pump components to provide all the requirements for panel power, VCOM, and gate modulation. Included in a single chip are a high frequency step-up dc-to-dc switching regulator, logic voltage regulator, VCOM amplifier, and gate pulse modulation circuitry. The step-up dc-to-dc converter provides up to 20 V output and includes a 2 A internal switch. Either a 650 kHz or 1.2 MHz stepup switching regulator frequency can be chosen, allowing easy filtering and low noise operation. It achieves 93% efficiency and features soft start to limit the inrush current at startup. The internal voltage regulator operates with an input voltage range of 3 V to 5.5 V and delivers a load current of up to