Product details

Vin (Min) (V) 5.5 Vin (Max) (V) 23 Vout (Min) (V) 1.23 Vout (Max) (V) 20 Iout (Max) (A) 3 Iq (Typ) (uA) 3000 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Enable Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 5.5 Vin (Max) (V) 23 Vout (Min) (V) 1.23 Vout (Max) (V) 20 Iout (Max) (A) 3 Iq (Typ) (uA) 3000 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Enable Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
HSOIC (DDA) 8 19 mm² 4.9 x 3.9
  • Wide Input Voltage Range:
    • TPS5430: 5.5 V to 36 V
    • TPS5431: 5.5 V to 23 V
  • Up to 3-A Continuous (4-A Peak) Output Current
  • High Efficiency up to 95% Enabled by 110-mΩ Integrated MOSFET Switch
  • Wide Output Voltage Range: Adjustable Down to 1.22 V with 1.5% Initial Accuracy
  • Internal Compensation Minimizes External Parts Count
  • Fixed 500 kHz Switching Frequency for Small Filter Size
  • Improved Line Regulation and Transient Response by Input Voltage Feed Forward
  • System Protected by Overcurrent Limiting, Overvoltage Protection and Thermal Shutdown
  • –40°C to 125°C Operating Junction Temperature Range
  • Available in Small Thermally Enhanced 8-Pin SO PowerPAD™ Package
  • Create a Custom Design Using the TPS5430 With the WEBENCH® Power Designer
  • Wide Input Voltage Range:
    • TPS5430: 5.5 V to 36 V
    • TPS5431: 5.5 V to 23 V
  • Up to 3-A Continuous (4-A Peak) Output Current
  • High Efficiency up to 95% Enabled by 110-mΩ Integrated MOSFET Switch
  • Wide Output Voltage Range: Adjustable Down to 1.22 V with 1.5% Initial Accuracy
  • Internal Compensation Minimizes External Parts Count
  • Fixed 500 kHz Switching Frequency for Small Filter Size
  • Improved Line Regulation and Transient Response by Input Voltage Feed Forward
  • System Protected by Overcurrent Limiting, Overvoltage Protection and Thermal Shutdown
  • –40°C to 125°C Operating Junction Temperature Range
  • Available in Small Thermally Enhanced 8-Pin SO PowerPAD™ Package
  • Create a Custom Design Using the TPS5430 With the WEBENCH® Power Designer

The TPS543x is a high-output-current PWM converter that integrates a low-resistance, high-side N-channel MOSFET. Included on the substrate with the listed features are a high-performance voltage error amplifier that provides tight voltage regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5 V; an internally set slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18 µA typically. Other features include an active-high enable, overcurrent limiting, over-voltage protection and thermal shutdown. To reduce design complexity and external component count, the TPS543x feedback loop is internally compensated. The TPS5431 is intended to operate from power rails up to 23 V. The TPS5430 regulates a wide variety of power sources including 24 V bus.

The TPS543x device is available in a thermally enhanced, easy to use 8-pin SOIC PowerPAD™ package. TI provides evaluation modules and the Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

The TPS543x is a high-output-current PWM converter that integrates a low-resistance, high-side N-channel MOSFET. Included on the substrate with the listed features are a high-performance voltage error amplifier that provides tight voltage regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5 V; an internally set slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18 µA typically. Other features include an active-high enable, overcurrent limiting, over-voltage protection and thermal shutdown. To reduce design complexity and external component count, the TPS543x feedback loop is internally compensated. The TPS5431 is intended to operate from power rails up to 23 V. The TPS5430 regulates a wide variety of power sources including 24 V bus.

The TPS543x device is available in a thermally enhanced, easy to use 8-pin SOIC PowerPAD™ package. TI provides evaluation modules and the 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 TPS543x 3-A, Wide Input Range, Step-Down Converter datasheet (Rev. I) 22 Mar 2017
User guide TPS543x Step-Down Converter Evaluation Module User's Guide (Rev. A) 11 Oct 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Application note Using TPS5410/20/30/31/50 w/Aluminum/Ceramic Output Capacitors (Rev. C) 21 Mar 2007

Design & development

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Evaluation board

TPS5431EVM-173 — 9V to 21Vin, 3A Step Down Converter

The TPS5431EVM-173 evaluation module allows the designer to evaluate the TPS5431 SWIFT DC/DC converter and is designed with very few external components. The input voltage range of this module is 9.0 V to 21 V and the output voltage is pre-set to 5 V. The output voltage can be easily (...)

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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 (...)
Gerber file

Gerber File for TPS54310EVM

SLVC043.ZIP (112 KB)
Gerber file

Gerber File for TPS54314EVM

SLVC044.ZIP (107 KB)
Package Pins Download
SO PowerPAD (DDA) 8 View options

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