SLVS632I January   2006  – April 2017 TPS5430 , TPS5431


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Oscillator Frequency
      2. 7.3.2  Voltage Reference
      3. 7.3.3  Enable (ENA) and Internal Slow Start
      4. 7.3.4  Undervoltage Lockout (UVLO)
      5. 7.3.5  Boost Capacitor (BOOT)
      6. 7.3.6  Output Feedback (VSENSE) and Internal Compensation
      7. 7.3.7  Voltage Feed-Forward
      8. 7.3.8  Pulse-Width-Modulation (PWM) Control
      9. 7.3.9  Overcurrent Limiting
      10. 7.3.10 Overvoltage Protection
      11. 7.3.11 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation near Minimum Input Voltage
      2. 7.4.2 Operation with ENA control
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 12-V Input to 5.0-V Output
        1. Design Requirements
        2. Detailed Design Procedure
          1. Custom Design With WEBENCH® Tools
          2. Switching Frequency
          3. Input Capacitors
          4. Output Filter Components
            1. Inductor Selection
            2. Capacitor Selection
          5. Output Voltage Set-Point
          6. BOOT Capacitor
          7. Catch Diode
          8. Advanced Information
            1. Output Voltage Limitations
            2. Internal Compensation Network
            3. Thermal Calculations
        3. Application Curves
      2. 8.2.2 Wide Input Voltage Ranges with TPS5430
        1. Design Requirements
        2. Detailed Design Procedure
        3. Wide Input Voltage Ranges with TPS5431
          1. Design Requirements
          2. Detailed Design Procedure
      3. 8.2.3 Circuit Using Ceramic Output Filter Capacitors
        1. Design Requirements
        2. Detailed Design Procedure
          1. Output Filter Component Selection
          2. External Compensation Network
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. Custom Design With WEBENCH® Tools
    2. 11.2 Related Links
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DDA|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information


  • 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


  • Consumer: Set-top Box, DVD, LCD Displays
  • Industrial and Car Audio Power Supplies
  • Battery Chargers, High Power LED Supply
  • 12-V/24-V Distributed Power Systems


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.

Device Information(1)

TPS5430 HSOP (8) 5.5 V to 36 V
TPS5431 5.5 V to 23 V
  1. For all available packages, see the orderable addendum at the end of the datasheet.
TPS5430 TPS5431 fp_schem_lvs632.gif

Revision History

Changes from H Revision (April 2016) to I Revision

Changes from G Revision (February 2015) to H Revision

  • Deleted "Recommended Land Pattern" figure from core data sheet. New drawings are furnished in the Mechanical, Packaging, and Orderable Information section.Go

Changes from F Revision (December 2014) to G Revision

  • Fixed typo error TPS5430x to TPS513x Go

Changes from E Revision (September 2013) to F Revision

  • Added ESD Rating table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go

Changes from D Revision (January 2013) to E Revision

  • Deleted SWIFT from the data sheet Title, Features, and DescriptionGo

Changes from C Revision (November 2006) to D Revision


Changes from B Revision (August 2006) to C Revision

  • Changed the Efficiency vs Output Current graphGo
  • Added the Circuit Using Ceramic Output Filter Capacitors sectionGo

Changes from A Revision (March 2006) to B Revision

  • Added Note 3 to the ABSOLUTE MAXIMUM RATINGS tableGo

Changes from * Revision (January 2006) to A Revision