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TPS40051PWPG4 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS40051PWPG4 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 37 page  TPS40050 TPS40051 TPS40053 SLUS540F − DECEMBER 2002 − REVISED JUNE 2004 WIDEINPUT SYNCHRONOUS BUCK CONTROLLER 8 FEATURES D Operating Input Voltage 8 V to 40 V D Input Voltage Feed-Forward Compensation 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 PowerPADt 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/Telecom 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 feed- forward, high-side current limit, and loop compensation. 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 compensation. 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. UDG−02130 5 13 12 16 15 1 2 3 KFF RT BP5 SGND VIN HDRV SW BP10 4 SYNC 11 ILIM TPS40050PWP 6 SS/SD 7 VFB 8 COMP 14 BOOST LDRV 10 PGND 9 + − VIN VOUT PowerPAD t is trademark of Texas Instruments. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. www.ti.com Copyright 2002, 2004, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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