LT1947

The LT 1947 is a highly integrated multiple output DC/DCconverter designed for use in TFT-LCD panels. The devicecontains two independent switching regulators. The mainregulator has an adjustable output voltage with an internal1.1A switch that can generate a boosted voltage as high as30V. The second regulator's output is also adjustable upto 30V and can deliver 10mA for positive bias. A simplelevel-shift charge pump off the main switch node gener-ates the negative bias voltage. An external capacitor setsthe delay time from AVDD's final value to the rising edge atthe VON pin. The 3MHz switching frequency allows the useof tiny low profile chip inductors and capacitors through-out, providing a low noise, low cost total solution with allcomponents under 1.2mm in height. The LT1947 operatesfrom an input range of 2.7V to 8V and is available in a10-lead MSOP package.