TPS40051 Datasheet | Texas Instruments

FEATURES D Operating Input Voltage 8 V to 40 V D Input Voltage Feed-Forward pensation D < 1 % Internal 0.7-V Reference D Programmable Fixed-Frequency Up to 1 MHz Voltage Mode Controller D Internal Gate Drive Outputs for High-Side and Synchronous N-Channel MOSFETs D 16-Pin Power PADt Package (θJC = 2°C/W) D Thermal Shutdown D Externally Synchronizable D Programmable High-Side Current Limit D Programmable Closed-Loop Soft-Start D TPS40050 Source Only D TPS40051 Source/Sink D TPS40053 Source/Sink With VOUT Prebias APPLICATIONS D Power Modules D Networking/Tele D Industrial D Servers SIMPLIFIED APPLICATION DESCRIPTION The TPS4005x is a family of high-voltage, wide input (8 V to 40 V), synchronous, step-down converters. The TPS4005x family offers design flexibility with a variety of user programmable functions, including soft-start, UVLO, operating frequency, voltage feedforward, high-side current limit, and loop pensation. The TPS4005x are also synchronizable to an external supply. They incorporate 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 TPS4005x uses voltage feed-forward control techniques to provide good line regulation over the wide (4:1) input voltage range, and fast response to input line transients with near constant gain with input variation which eases loop pensation. The externally programmable current limit provides pulse-by-pulse current limit, as well as hiccup mode operation utilizing an internal fault counter for longer duration overloads. TPS40050PWP 1 KFF ILIM 16 2 RT VIN 15 3 BP5 BOOST 14 4 SYNC HDRV 13 5 SGND SW 12 6 SS/SD BP10 11 7 VFB LDRV 10 8 P PGND 9 + VOUT - UDG- 02130 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and...