4.5 to 5.5V Input, 8A Synchronous Step-Down SWIFT™ Converter for Prebiased Outputs


Product details


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Package | Pins | Size

HTSSOP (PWP) 28 43 mm² 4.4 x 9.7 open-in-new Find other Buck converters (integrated switch)


  • 30-m, 12-A Peak MOSFET Switches for High Efficiency at 8-A Continuous Output Source or Sink Current
  • Disabled Current Sinking During Start-Up
  • 0.9-V to 3.3-V Adjustable Output Voltage Range With 1.0% Accuracy
  • Wide PWM Frequency:
       Fixed 350 kHz, 550 kHz or Adjustable 280 kHz to 700 kHz
  • Synchronizable to 700 kHz
  • Load Protected by Peak Current Limit and Thermal Shutdown
  • Integrated Solution Reduces Board Area and Component Count
    • Low-Voltage, High-Density Distributed Power Systems
    • Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors
    • Broadband, Networking and Optical Communications Infrastructure
    • Power PC Series Processors

PowerPAD and SWIFT are trademarks of Texas Instruments.

open-in-new Find other Buck converters (integrated switch)


As a member of the SWIFT™ family of dc/dc regulators, family of dc/dc regulators,the TPS54873 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 under-voltage-lockout circuit to prevent start-up until the input voltage reaches 4 V; an internally or externally set slow-start circuit to limit inrush 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 TPS54873 is designed to only source current during startup.

The TPS54873 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.

open-in-new Find other Buck converters (integrated switch)

Technical documentation

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Type Title Date
* Datasheet 4-V to 6-V Input, 8-A Output Synchronous Buck Switcher datasheet (Rev. A) Mar. 08, 2005
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes Thermal Performance of SWIFT(TM) DC/DC Converters in the 28-Pin HTSSOP Package Feb. 04, 2005
More literature XILINXPWR-082 EVM Jul. 23, 2004
Application notes Sequencing with TPS54x80 and TPS54x73 DC/DC Converters Apr. 14, 2003
User guides DC/DC Converter With Disabled Sink During Start-Up EVM Jan. 17, 2003
Application notes Using Low Voltage SWIFT DC/DC Converters with Ceramic Capacitors Jan. 08, 2003

Design & development

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Design tools & simulation

SLVC053.ZIP (147 KB)

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 28 View options

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