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TPS54872PWPR Datasheet(PDF) 1 Page - Texas Instruments |
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TPS54872PWPR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 17 page TPS54872 SLVS436C − JULY 2002 − REVISED FEBRUARY 2005 8A OUTPUT, 4V TO 6V INPUT TRACKING/TERMINATION SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FETs (SWIFT) 6,4 mm x 9,7 mm FEATURES D Tracks Externally Applied Reference Voltage D 30-mΩ MOSFET Switches for High Efficiency at 8-A Continuous Output Source or Sink Current D 6% to 90% VI Output Tracking Range D Wide PWM Frequency: Fixed 350 kHz or Adjustable 280 kHz to 700 kHz D Load Protected by Peak Current Limit and Thermal Shutdown D Integrated Solution Reduces Board Area and Total Cost APPLICATIONS D DDR Memory Termination Voltage D Active Termination of GTL and SSTL High-Speed Logic Families D DAC Controlled High Current Output Stage D Precision Point of Load Power Supply DESCRIPTION As a member of the SWIFT family of dc/dc regulators, the TPS54872 low-input voltage high-output current synchronous-buck PWM converter integrates all required active components. Included on the substrate with the listed features are a true, high performance, voltage error amplifier that enables maximum performance under transient conditions and flexibility in choosing the output filter L and C components; an under-voltage-lockout circuit to prevent start-up until the input voltage reaches 3.8 V; an internally set slow-start circuit to limit in-rush currents; and a status output to indicate valid operating conditions. The TPS54872 is available in a thermally enhanced 28-pin TSSOP (PWP) PowerPAD package, which eliminates bulky heatsinks. TI provides evaluation modules and the SWIFT designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles. SIMPLIFIED SCHEMATIC VIN PH BOOT PGND VSENSE V(TTQ) AGND VBIAS Input TPS54872 COMP Compensation Network REFIN t − Time − 100 ms/div TRANSIENT RESPONSE VI = 5 V, VO = 1.25 V 2 A to 6 A V(DDQ) 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. PowerPAD and SWIFT are trademarks 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 − 2005, Texas Instruments Incorporated |
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