SLVS839F July   2008  – October 2014 TPS54331

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Simplified Schematic
    1.     TPS54331 (D Package) Efficiency
  5. Revision History
  6. Pin Configuration and Functions
    1.     Pin Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Fixed-Frequency PWM Control
      2. 8.3.2  Voltage Reference (Vref)
      3. 8.3.3  Bootstrap Voltage (BOOT)
      4. 8.3.4  Enable and Adjustable Input Undervoltage Lockout (VIN UVLO)
      5. 8.3.5  Programmable Slow Start Using SS Pin
      6. 8.3.6  Error Amplifier
      7. 8.3.7  Slope Compensation
      8. 8.3.8  Current-Mode Compensation Design
      9. 8.3.9  Overcurrent Protection and Frequency Shift
      10. 8.3.10 Overvoltage Transient Protection
      11. 8.3.11 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Eco-mode™
      2. 8.4.2 Operation With VIN < 3.5 V
      3. 8.4.3 Operation With EN Control
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1  Custom Design with WEBENCH Tools
        2. 9.2.2.2  Switching Frequency
        3. 9.2.2.3  Output Voltage Set Point
        4. 9.2.2.4  Input Capacitors
        5. 9.2.2.5  Output Filter Components
          1. 9.2.2.5.1 Inductor Selection
        6. 9.2.2.6  Capacitor Selection
        7. 9.2.2.7  Compensation Components
        8. 9.2.2.8  Bootstrap Capacitor
        9. 9.2.2.9  Catch Diode
        10. 9.2.2.10 Output Voltage Limitations
        11. 9.2.2.11 Power Dissipation Estimate
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Electromagnetic Interference (EMI) Considerations
  12. 12Device and Documentation Support
    1. 12.1 Custom Design with WEBENCH Tools
    2. 12.2 Device Support
      1. 12.2.1 Development Support
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

Application Curves

TPS54331 eff1_io_lvu247.gif
TPS54331 (D Package)
Figure 11. Efficiency
TPS54331 lr_io_lvu247.gif
TPS54331 (D Package)
Figure 13. Load Regulation
TPS54331 trns_res_lvu247.gifFigure 15. Transient Response
TPS54331 out_ripp_lvu247.gifFigure 17. Output Ripple
TPS54331 startup_lvu247.gifFigure 19. Startup
TPS54331 vo_vi_min_lvs839.gif
Figure 21. Typical Minimum Output Voltage vs Input Voltage
TPS54331 tj_pd_lvs839.gif
TPS54331 (D Package)
Figure 23. Maximum Power Dissipation vs Junction Temperature
TPS54331 eff2_io_lvu247.gif
TPS54331 (D Package)
Figure 12. Low Current Efficiency
TPS54331 line_vi_lvu247.gif
TPS54331 (D Package)
Figure 14. Line Regulation
TPS54331 c_loop_res_lvu247.gifFigure 16. Loop Response
TPS54331 in_ripp_lvu247.gifFigure 18. Input Ripple
TPS54331 startup2_lvu247.gifFigure 20. Startup Relative to Enable
TPS54331 vo2_vi_lvs839.gif
Figure 22. Typical Maximum Output Voltage vs Input Voltage
TPS54331 tj_pd_DDA_lvs839.gif
TPS54331 (D Package)
Figure 24. Maximum Power Dissipation vs Junction Temperature