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TPS54373 Fiches technique(PDF) 1 Page - Texas Instruments |
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TPS54373 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 22 page TPS54373 SLVS455B − JANUARY 2003 − REVISED FEBRUARY 2005 3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS BUCK SWITCHER WITH DISABLED SINKING DURING START-UP 6,4 mm X 6,6 mm Typical Size FEATURES D 60-mΩ MOSFET Switches for High Efficiency at 3-A Continuous Output Source or Sink Current D Disabled Current Sinking During Start-Up D Adjustable Output Voltage Down to 0.9 V With 1.0% Accuracy D Wide PWM Frequency: Fixed 350 kHz, 550 kHz or Adjustable 280 kHz to 700 kHz D Synchronizable to 700 kHz D Load Protected by Peak Current Limit and Thermal Shutdown D Integrated Solution Reduces Board Area and Component Count APPLICATIONS D Low-Voltage, High-Density Distributed Power Systems D Point of Load Regulation for High-Performance DSPs, FPGAs, ASICs, and Microprocessors D Broadband, Networking, and Optical Communications Infrastructure D Power PC Series Processors DESCRIPTION As a member of the SWIFT™ family of dc/dc regulators, the TPS54373 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 and flexibility in choosing the output filter L and C components; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 3 V; an internally or externally set slow-start circuit to limit in-rush currents; and a power-good output useful for processor/logic reset, fault signaling, and supply sequencing. For reliable power up in output precharge applications, the TPS54373 is designed to only source current during start-up. The TPS54373 is available in a thermally enhanced 20-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. VIN PH BOOT PGND VSENSE Core Supply COMP AGND VBIAS I/O Supply TPS54373 ** * Optional START-UP WAVEFORM TYPICAL APPLICATION 5.0 ms/div VO = 1.8 V VI = 3.3 V RL = 1 Ω 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 © 2003, Texas Instruments Incorporated |
Numéro de pièce similaire - TPS54373_15 |
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Description similaire - TPS54373_15 |
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