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TPS54380 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS54380 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 17 page www.ti.com FEATURES DESCRIPTION APPLICATIONS Simplified Schematic 50 55 60 65 70 75 80 85 90 95 100 0 0.5 1 1.5 2 3 2.5 3.5 I - Output O Current − A EFFICIENCY vs LOAD CURRENT VIN PWRGD SS/ENA SYNC RT PH BOOT PGND VSENSE Output COMP AGND VBIAS Input TPS54317 T = 25 C, V = 3.3 V, V = 1.8 V, fs = 1.1 MHz A I O o TPS54317 SLVS619A – NOVEMBER 2005 – REVISED FEBRUARY 2006 1.6 MHz, 3-V TO 6-V INPUT, 3-A SYNCHRONOUS STEP-DOWN SWIFT™ CONVERTER • 60-m Ω MOSFET Switches for High Efficiency As members of the SWIFT™ family of dc/dc at 3-A Continuous Output Current regulators, the TPS54317 low-input-voltage high-output-current synchronous-buck PWM • Adjustable Output Voltage Down to 0.9 V With converter integrates all required active components. 1% Accuracy Included on the substrate with the listed features are • Switching Frequency: Adjustable From a true, high performance, voltage error amplifier that 280 kHz to 1600 kHz provides high performance under transient conditions; • Externally Compensated for Design Flexibility an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 3 V; an internally and • Fast Transient Response externally set slow-start circuit to limit in-rush • Load Protected by Peak Current Limit and currents; and a power good output useful for Thermal Shutdown processor/logic reset, fault signaling, and supply • Integrated Solution Reduces Board Area and sequencing. Total Cost The TPS54317 device is available in a thermally • Spacing Saving 4mm x 5mm QFN Packaging enhanced 24-pin QFN (RHF) PowerPAD™ package, which eliminates bulky heatsinks. TI provides • For SWIFT Documentation, Application Notes, evaluation modules and the SWIFT designer software and Design Software, see the TI website at tool to aid in achieving high-performance power www.ti.com/swift supply designs to meet aggressive equipment development cycles. • Low-Voltage, High-Density Systems With Power Distributed at 5 V or 3.3 V • Point of Load Regulation for High Performance DSPs, FPGAs, ASICs, and Microprocessors • Broadband, Networking and Optical Communications Infrastructure 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. SWIFT, PowerPAD are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2005–2006, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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