Power-supply IC provides high efficiency for LCD HDTV panels
Maxim Integrated Products announces the MAX17122, a multiple-output power-supply IC that integrates three regulators whose high-efficiency and fixed-frequency operation allow the use of small inductors and capacitors. This results in a compact and cost-competitive solution for the power requirements of thin-film transistor (TFT) LCD HDTV panels. The MAX17122 operates from 8 to 16.5 V input voltages and is optimized for applications running directly from 12-V regulated supplies.
The MAX17122 includes a 22-V internal-switch step-down regulator for digital logic; a 16.5-V internal-switch step-up regulator to power the TFT source drivers; and a temperature-compensated 36-V internal-switch boost-buck regulator that produces a negative output, which varies according to the temperature sensed by an external NTC thermistor. The GATE output directly drives an external p-channel MOSFET to provide True Shutdown of the step-up output. The new IC is available in a 6 x 6mm, 40-pin TQFN package and operates over the -40° to 85° C temperature range.
For more information, contact Maxim Integrated Products, 120 San Gabriel Dr., Sunnyvale, CA 94086. Phone: (408) 737-7600.