TPS40056

TPS40056 8 WIDEĆINPUT SYNCHRONOUS, TRACKING BUCK CONTROLLER SLVS612 − APRIL 2006 FEATURES D Operating Input Voltage 10 V to 40 V D Output Voltage Tracks External Reference 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 Externally Synchronizable D Programmable Short-Circuit Protection D Thermal Shutdown D 16-Pin PowerPADt Package (θJC = 2°C/W) D Programmable Closed-Loop Soft-Start APPLICATIONS D DDR Tracking Regulators D Power Modules D Networking Equipment D Industrial Servers SIMPLIFIED APPLICATION DIAGRAM CONTENTS Device Ratings Electrical Characteristics Terminal Information Application Information Design Example Additional References 2 3 5 7 22 29 DESCRIPTION The TPS40056 is part of a family of high-voltage, wide input, synchronous, step-down converters. The TPS40056 offers design flexibility with a variety of user programmable functions, including soft-start, operating frequency, high-side current limit, and loop compensation. The TPS40056 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 ...