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


Package | PIN: PWP | 28
Temp: I (-40 to 85)
Carrier: Partial Tube
Qty Price
1-9 $8.99
10-24 $8.36
25-99 $8.06
100-249 $7.04
250-499 $6.70
500-749 $6.17
750-999 $5.54
1000+ $5.52


  • 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.

Texas Instruments  TPS54873PWP

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.