SLUSF22 November   2024 TPS54538

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 Peak Current Mode
      2. 6.3.2  Mode Selection
      3. 6.3.3  Voltage Reference
      4. 6.3.4  Output Voltage Setting
      5. 6.3.5  Switching Frequency Selection / Synchronization
      6. 6.3.6  Phase Shift
      7. 6.3.7  Enable and Adjusting Undervoltage Lockout
      8. 6.3.8  External Soft Start and Prebiased Soft Start
      9. 6.3.9  Power Good
      10. 6.3.10 Minimum On Time, Minimum Off Time, and Frequency Foldback
      11. 6.3.11 Frequency Spread Spectrum
      12. 6.3.12 Overvoltage Protection
      13. 6.3.13 Overcurrent and Undervoltage Protection
      14. 6.3.14 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Modes Overview
      2. 6.4.2 Heavy Load Operation
      3. 6.4.3 Pulse Frequency Modulation
      4. 6.4.4 Forced Continuous Conduction Modulation
      5. 6.4.5 Dropout Operation
      6. 6.4.6 Minimum On-Time Operation
      7. 6.4.7 Shutdown Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Custom Design With WEBENCH® Tools
        2. 7.2.2.2 Output Voltage Resistors Selection
        3. 7.2.2.3 Choosing Switching Frequency
        4. 7.2.2.4 Soft-Start Capacitor Selection
        5. 7.2.2.5 Output Inductor Selection
        6. 7.2.2.6 Output Capacitor Selection
        7. 7.2.2.7 Input Capacitor Selection
        8. 7.2.2.8 Feedforward Capacitor CFF Selection
        9. 7.2.2.9 Maximum Ambient Temperature
      3. 7.2.3 Application Curves
    3. 7.3 Best Design Practices
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
      2. 8.1.2 Development Support
        1. 8.1.2.1 Custom Design With WEBENCH® Tools
    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

5.6 Typical Characteristics

TJ = –40°C to 150°C, VIN = 12V, unless otherwise noted.

TPS54538 TPS54538 Quiescent Current (PFM) vs Junction TemperatureFigure 5-1 TPS54538 Quiescent Current (PFM) vs Junction Temperature
TPS54538 High-Side RDSON vs Junction TemperatureFigure 5-3 High-Side RDSON vs Junction Temperature
TPS54538 Feedback Voltage vs Junction TemperatureFigure 5-5 Feedback Voltage vs Junction Temperature
TPS54538 Disable Threshold vs Junction TemperatureFigure 5-7 Disable Threshold vs Junction Temperature
TPS54538 VIN UVLO Falling Threshold vs Junction TemperatureFigure 5-9 VIN UVLO Falling Threshold vs Junction Temperature
TPS54538 TPS54538 High-Side Current Limit vs Junction TemperatureFigure 5-11 TPS54538 High-Side Current Limit vs Junction Temperature
TPS54538 OVP Threshold vs Junction TemperatureFigure 5-13 OVP Threshold vs Junction Temperature
TPS54538 Soft-Start Charge Current vs Junction TemperatureFigure 5-15 Soft-Start Charge Current vs Junction Temperature
TPS54538 TPS54538 Efficiency (FCCM), VIN = 24V, VOUT = 12V, fSW = 500kHz, L = 5.6µHFigure 5-17 TPS54538 Efficiency (FCCM), VIN = 24V, VOUT = 12V,
fSW = 500kHz, L = 5.6µH
TPS54538 TPS54538 Load Regulation (FCCM), VIN = 24V, VOUT = 12V, fSW = 500kHzFigure 5-19 TPS54538 Load Regulation (FCCM),
VIN = 24V, VOUT = 12V, fSW = 500kHz
TPS54538 TPS54538 Shutdown Current vs Junction TemperatureFigure 5-2 TPS54538 Shutdown Current vs Junction Temperature
TPS54538 Low-Side RDSON vs Junction TemperatureFigure 5-4 Low-Side RDSON vs Junction Temperature
TPS54538 Enable Threshold vs Junction TemperatureFigure 5-6 Enable Threshold vs Junction Temperature
TPS54538 VIN UVLO Rising Threshold vs Junction TemperatureFigure 5-8 VIN UVLO Rising Threshold vs Junction Temperature
TPS54538 Switching Frequency (RT Floating) vs Junction TemperatureFigure 5-10 Switching Frequency (RT Floating) vs Junction Temperature
TPS54538 TPS54538 Low-Side Current Limit vs Junction TemperatureFigure 5-12 TPS54538 Low-Side Current Limit vs Junction Temperature
TPS54538 UVP Threshold vs Junction TemperatureFigure 5-14 UVP Threshold vs Junction Temperature
TPS54538 TPS54538 Efficiency (PFM), VIN = 24V, VOUT = 12V, fSW = 500kHz, L = 5.6µHFigure 5-16 TPS54538 Efficiency (PFM), VIN = 24V, VOUT = 12V,
fSW = 500kHz, L = 5.6µH
TPS54538 TPS54538 Load Regulation (PFM), VIN = 24V, VOUT = 12V, fSW = 500kHzFigure 5-18 TPS54538 Load Regulation (PFM),
VIN = 24V, VOUT = 12V, fSW = 500kHz
TPS54538 TPS54538 Switching Frequency vs VIN, VOUT = 5V, IOUT = 5AFigure 5-20 TPS54538 Switching Frequency vs VIN, VOUT = 5V, IOUT = 5A