Linear Technology Debuts LT1942 Switching Regulator

Linear Technology Corp. (LTC, Milpitas, CA) announced its new LT1942, an integrated quad-switching regulator designed to provide all necessary power supply functions for TFT displays and their required white LED backlighting. The LT1942, packaged in a 4 mm x 4 mm QFN was designed to power 2 in to 7 in TFT-LCD panels in applications ranging from PDAs to automotive GPS displays.

The LT1942 operates from an input-voltage range of 2.6 V to 16 V, making it suitable for applications ranging from lithium-ion-powered handhelds to automotive applications. Its 1 MHz switching frequency provides low noise operation by keeping external components tiny and providing a compact solution footprint and profile.

The TFT supply incorporates two boost and one inverting dc-dc converters. The TFT supply output voltages are independently set, unlike charge pump solutions that have several limitations, enabling greater flexibility in TFT-LCD designs. In order to make the solution as compact as possible, schottky diodes have been integrated into the device.

The LT1942 is available in a 4 mm x 4 mm QFN-24 available from stock. Pricing starts at $2.75 each for 1,000-piece quantities.