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3V to 6V Input, 3A Synchronous Step-Down SWIFT™ Converter

TPS54317 is not recommended for new designs
Although this product continues to be in production to support previous designs, we don't recommend it for new designs. Consider one of these alternates:
open-in-new Compare alternates
Same functionality with different pin-out to the compared device
TPSM82813 ACTIVE 2.75-V to 6-V, 3-A step-down module with adjustable-frequency & tracking in 3 x 4-mm μSIP package Module with integrated inductor with or without spread spectrum

Product details

Vin (min) (V) 3 Vin (max) (V) 6 Vout (min) (V) 0.9 Vout (max) (V) 3.3 Iout (max) (A) 3 Iq (typ) (mA) 6.2 Switching frequency (min) (kHz) 280 Switching frequency (max) (kHz) 1600 Features Enable, Frequency synchronization, Power good, Synchronous Rectification Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 90 Type Converter
Vin (min) (V) 3 Vin (max) (V) 6 Vout (min) (V) 0.9 Vout (max) (V) 3.3 Iout (max) (A) 3 Iq (typ) (mA) 6.2 Switching frequency (min) (kHz) 280 Switching frequency (max) (kHz) 1600 Features Enable, Frequency synchronization, Power good, Synchronous Rectification Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (max) (%) 90 Type Converter
VQFN (RHF) 24 20 mm² 5 x 4
  • 60-m MOSFET Switches for High Efficiency at 3-A Continuous Output Current
  • Adjustable Output Voltage Down to 0.9 V With 1% Accuracy
  • Switching Frequency: Adjustable From 280 kHz to 1600 kHz
  • Externally Compensated for Design Flexibility
  • Fast Transient Response
  • Load Protected by Peak Current Limit and Thermal Shutdown
  • Integrated Solution Reduces Board Area and Total Cost
  • Spacing Saving 4mm x 5mm QFN Packaging
  • For SWIFT Documentation, Application Notes, and Design Software, see the TI website at www.ti.com/swift
  • APPLICATIONS
    • 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

  • 60-m MOSFET Switches for High Efficiency at 3-A Continuous Output Current
  • Adjustable Output Voltage Down to 0.9 V With 1% Accuracy
  • Switching Frequency: Adjustable From 280 kHz to 1600 kHz
  • Externally Compensated for Design Flexibility
  • Fast Transient Response
  • Load Protected by Peak Current Limit and Thermal Shutdown
  • Integrated Solution Reduces Board Area and Total Cost
  • Spacing Saving 4mm x 5mm QFN Packaging
  • For SWIFT Documentation, Application Notes, and Design Software, see the TI website at www.ti.com/swift
  • APPLICATIONS
    • 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

As members of the SWIFT family of dc/dc regulators, the TPS54317 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 provides high performance under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 3 V; an internally and 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.

The TPS54317 device is available in a thermally enhanced 24-pin QFN (RHF) PowerPAD package, which eliminates bulky heatsinks. TI provides evaluation modules and the SWIFT designer software tool to aid in achieving high-performance power supply designs to meet aggressive equipment development cycles.

As members of the SWIFT family of dc/dc regulators, the TPS54317 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 provides high performance under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 3 V; an internally and 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.

The TPS54317 device is available in a thermally enhanced 24-pin QFN (RHF) PowerPAD package, which eliminates bulky heatsinks. TI provides evaluation modules and the SWIFT designer software tool to aid in 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 1.6MHz 3-V to 6-V Input 3-A Synchronous Step-Down Swift(TM) Converter datasheet (Rev. B) 25 Sep 2009
More literature Исходные проекты ll 13 May 2011
EVM User's guide TPS54317EVM-159 3-Amp, SWIFT(TM) Regulator EVM 06 Jan 2006

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS54317EVM-159 — 1.6MHz, 3-A, 3-6Vin Step Down Converter

The TPS54317EVM-159 kit allows the designer to easily evaluate the TPS54317 synchronous buck DC/DC converter with integrated 3 A continuous power MOSFETs. This design is optimized for small size by taking advantage of the high switching frequency of the TPS54317. The input range is 3-6 V (...)

User guide: PDF
Not available on TI.com
Simulation model

TPS54317 TINA-TI Transient Reference Design

SLVM301.TSC (838 KB) - TINA-TI Reference Design
Simulation model

TPS54317 TINA-TI Transient Spice Model

SLVM302.ZIP (37 KB) - TINA-TI Spice Model
Simulation model

TPS54317 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM130A.ZIP (59 KB) - PSpice Model
Bill of materials (BOM)

OMAP and Spartan 6 reference design

SLVR349.PDF (260 KB)
Bill of materials (BOM)

Power Reference Design for the Xilinx Spartan™-6 LX150

SLVR351.PDF (304 KB)
Bill of materials (BOM)

Spartan 6 OMAPReference Design

SLVR380.PDF (241 KB)
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins Download
VQFN (RHF) 24 View options

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