Linear Technology Corp. (LTC, Milpitas, CA) announced its new LT1943, a high-current, quad-output, adjustable switching regulator developed specifically for 22in and larger TFT LCD applications. It operates from an input range of 4.5V to 22V, delivering independent outputs for VLOGIC, AVDD, VON and VOFF as required by TFT LCD applications.
The LT1943 contains a 2.4A buck regulator to power VLOGIC, a 2.6A boost regulator to drive TFTs, a high-voltage TFT biasing output and an inverter for negative TFT biasing. All of the switchers are synchronized to an internal 1.2MHz clock, keeping switching noise out of critical audio bands and enabling the use of low-profile inductors and tiny ceramic input and output capacitors. Its TSSOP-28E exposed pad package and tiny externals provide a compact, low-profile, thermally efficient footprint.
The LT1943EFE is available from stock in a 28-lead TSSOP package. Pricing starts at $4.75 each for 1,000-piece quantities.