SLVSI78B January   2025  – December 2025 TPS542021 , TPS542025

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Fixed-Frequency PWM Control
      2. 6.3.2  Pulse Frequency Modulation
      3. 6.3.3  Error Amplifier
      4. 6.3.4  Slope Compensation and Output Current
      5. 6.3.5  Enable and Adjusting Undervoltage Lockout
      6. 6.3.6  Safe Start-Up into Prebiased Outputs
      7. 6.3.7  Voltage Reference
      8. 6.3.8  Adjusting Output Voltage
      9. 6.3.9  Internal Soft Start
      10. 6.3.10 Bootstrap Voltage (BOOT)
      11. 6.3.11 Overcurrent Protection
        1. 6.3.11.1 High-Side MOSFET Overcurrent Protection
        2. 6.3.11.2 Low-Side MOSFET Overcurrent Protection
      12. 6.3.12 Spread Spectrum
      13. 6.3.13 Output Overvoltage Protection (OVP)
      14. 6.3.14 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Normal Operation
      2. 6.4.2 Eco-mode Operation
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 TPS542021 5V to 30V Input, 5V Output Converter
      2. 7.2.2 Design Requirements
      3. 7.2.3 Detailed Design Procedure
        1. 7.2.3.1 Input Capacitor Selection
        2. 7.2.3.2 Bootstrap Capacitor Selection
        3. 7.2.3.3 Output Voltage Setpoint
        4. 7.2.3.4 Undervoltage Lockout Setpoint
        5. 7.2.3.5 Output Filter Components
          1. 7.2.3.5.1 Inductor Selection
          2. 7.2.3.5.2 Output Capacitor Selection
          3. 7.2.3.5.3 Feed-Forward Capacitor
      4. 7.2.4 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

7.2.4 Application Curves

The following data is tested with VIN = 24V, VOUT = 5V, TA = 25°C, unless otherwise specified.

TPS542021 TPS542025 TPS542021EVM EfficiencyFigure 7-2 TPS542021EVM Efficiency
TPS542021 TPS542025 TPS542021EVM Load RegulationFigure 7-4 TPS542021EVM Load Regulation
TPS542021 TPS542025 TPS542021EVM Output Voltage Ripple, IOUT = 0.1AFigure 7-6 TPS542021EVM Output Voltage Ripple, IOUT = 0.1A
TPS542021 TPS542025 TPS542021EVM Output Voltage Ripple, IOUT = 0AFigure 7-8 TPS542021EVM Output Voltage Ripple, IOUT = 0A
TPS542021 TPS542025 TPS542021EVM Load Transient Response, 0.2A to 1.8A Load StepFigure 7-10 TPS542021EVM Load Transient Response, 0.2A to 1.8A Load Step
TPS542021 TPS542025 TPS542021EVM Start-Up Relative to VINFigure 7-12 TPS542021EVM Start-Up Relative to VIN
TPS542021 TPS542025 TPS542021EVM Line Regulation, IOUT = 2AFigure 7-3 TPS542021EVM Line Regulation, IOUT = 2A
TPS542021 TPS542025 TPS542021EVM Output Voltage Ripple, IOUT = 2AFigure 7-5 TPS542021EVM Output Voltage Ripple, IOUT = 2A
TPS542021 TPS542025 TPS542021EVM Output Voltage Ripple, IOUT = 0.01AFigure 7-7 TPS542021EVM Output Voltage Ripple, IOUT = 0.01A
TPS542021 TPS542025 TPS542021EVM Load Transient Response, 0A to 2A Load StepFigure 7-9 TPS542021EVM Load Transient Response, 0A to 2A Load Step
TPS542021 TPS542025 TPS542021EVM Load Transient Response, 1A to 2A Load StepFigure 7-11 TPS542021EVM Load Transient Response, 1A to 2A Load Step
TPS542021 TPS542025 TPS542021EVM Shutdown Relative to VINFigure 7-13 TPS542021EVM Shutdown Relative to VIN