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TPS54873

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

TPS54873 is in the process of being discontinued
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TPS62871-Q1 ACTIVE Automotive, 2.7V to 6V input, 9A stackable synchronous buck converter new generation

Product details

Vin (min) (V) 4 Vin (max) (V) 6 Vout (min) (V) 0.9 Vout (max) (V) 3.3 Iout (max) (A) 8 Iq (typ) (mA) 11 Switching frequency (min) (kHz) 280 Switching frequency (max) (kHz) 700 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 90 Type Converter
Vin (min) (V) 4 Vin (max) (V) 6 Vout (min) (V) 0.9 Vout (max) (V) 3.3 Iout (max) (A) 8 Iq (typ) (mA) 11 Switching frequency (min) (kHz) 280 Switching frequency (max) (kHz) 700 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 90 Type Converter
HTSSOP (PWP) 28 62.08 mm² 9.7 x 6.4
  • 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
  • APPLICATIONS
    • 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.

  • 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
  • APPLICATIONS
    • 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.

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.

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.

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Technical documentation

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Type Title Date
* Data sheet 4-V to 6-V Input, 8-A Output Synchronous Buck Switcher datasheet (Rev. A) 08 Mar 2005
Application note Thermal Performance of SWIFT(TM) DC/DC Converters in the 28-Pin HTSSOP Package 04 Feb 2005
More literature XILINXPWR-082 EVM 23 Jul 2004
Application note Sequencing with TPS54x80 and TPS54x73 DC/DC Converters 14 Apr 2003
EVM User's guide DC/DC Converter With Disabled Sink During Start-Up EVM 17 Jan 2003
Application note Using Low Voltage SWIFT DC/DC Converters with Ceramic Capacitors 08 Jan 2003

Design & development

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Gerber file

Gerber File for TPS54x73EVM

SLVC053.ZIP (147 KB)
Simulation tool

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HTSSOP (PWP) 28 View options

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