DESCRIPTION
The LT®1947 is a highly integrated multiple output DC/DC converter designed for use in TFT-LCD panels. The device contains two independent switching regulators. The main regulator has an adjustable output voltage with an internal 1.1A switch that can generate a boosted voltage as high as 30V. The second regulator’s output is also adjustable up to 30V and can deliver 10mA for positive bias. A simple level-shift charge pump off the main switch node generates the negative bias voltage.

FEATURES
■ Complete Solution Under 1.2mm
■ Develops Three Outputs from a 3.3V or 5V Supply
■ Externally Programmable VON Delay
■ Fixed Frequency Low Noise Outputs
■ All Ceramic Capacitors
■ 3MHz Switching Frequency
■ Fast Transient Response
■ Few External Components Required
■ 2.7V to 8V Input Range
■ Adjustable AVDD and VON Voltages
■ Tiny 10-Lead MSOP Package

APPLICATIONS
■ TFT-LCD Notebook Display Panels
■ TFT-LCD Desktop Monitor Display Panels
■ Digital Cameras
■ Handheld Computers