TPS40052

TPS40052 8 SLUS563C − AUGUST 2003 − REVISED FEBRUARY 2005 WIDEĆINPUT SYNCHRONOUS, BUCK CONTROLLER FEATURES D Operating Input Voltage 10 V to 40 V D Programmable Fixed-Frequency Up to 100 kHz to 1 MHz Voltage Mode Controller D Internal Gate Drive Outputs for High-Side and Synchronous N-Channel MOSFETs D 16-Pin PowerPADt Package (θJC = 2°C/W) D Thermal Shutdown D Externally Synchronizable D Programmable Short-Circuit Protection D Programmable Closed-Loop Soft-Start APPLICATIONS D DDR Tracking Regulators D Power Modules D Networking Equipment D Industrial Servers DESCRIPTION The TPS40052 is part of a family of high-voltage, wide input, synchronous, step-down converters. The TPS40052 offers design flexibility with a variety of user programmable functions, including soft-start, operating frequency, high-side current limit, and loop compensation. The TPS40052 is also synchronizable to an external supply. It incorporates MOSFET gate drivers for external N-channel high-side and synchronous rectifier (SR) MOSFETs. Gate drive logic incorporates anti-cross conduction circuitry to prevent simultaneous high-side and synchronous rectifier conduction. The externally programmable short circuit protection provides pulse-by-pulse current limit, as well as hiccup mode operation utilizing an internal fault counter for longer duration overloads. SIMPLIFIED APPLICATION DIAGRAM + TPS40052PWP VIN 1 SYNC ILIM 16 − 2 RT VIN 15 DDR VDDQ 3 BP5 BOOST 14 4 EA_REF HDRV 13 5 SGND SW 12 6 S...