SLVSA23A September   2009  – January 2024 TPS5410-Q1

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Electrostatic Discharge Caution
  6. 5Ordering Information
  7. 6Pin Assignments
    1. 6.1 Terminal Functions
  8. 7Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information 
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  9. 8Application Information
    1. 8.1 Functional Block Diagram
    2. 8.2 Detailed Description
      1. 8.2.1  Oscillator Frequency
      2. 8.2.2  Voltage Reference
      3. 8.2.3  Enable (ENA) and Internal Slow Start
      4. 8.2.4  Undervoltage Lockout (UVLO)
      5. 8.2.5  Boost Capacitor (BOOT)
      6. 8.2.6  Output Feedback (VSENSE)
      7. 8.2.7  Internal Compensation
      8. 8.2.8  Voltage Feed Forward
      9. 8.2.9  Pulse-Width-Modulation (PWM) Control
      10. 8.2.10 Overcurrent Liming
      11. 8.2.11 Overvoltage Protection
      12. 8.2.12 Thermal Shutdown
      13. 8.2.13 PCB Layout
      14. 8.2.14 Application Circuits
      15. 8.2.15 Design Procedure
        1. 8.2.15.1 Design Parameters
        2. 8.2.15.2 Switching Frequency
        3. 8.2.15.3 Input Capacitors
        4. 8.2.15.4 Output Filter Components
          1. 8.2.15.4.1 Inductor Selection
          2. 8.2.15.4.2 Capacitor Selection
          3.        40
          4.        41
        5. 8.2.15.5 Output Voltage Setpoint
        6. 8.2.15.6 Boot Capacitor
        7. 8.2.15.7 Catch Diode
        8. 8.2.15.8 Additional Circuits
      16. 8.2.16 Output Filter Capacitor Selection
      17. 8.2.17 External Compensation Network
    3. 8.3 Advanced Information
      1. 8.3.1 Output Voltage Limitations
      2. 8.3.2 Internal Compensation Network
      3. 8.3.3 Thermal Calculations
    4. 8.4 Performance Graphs
    5. 8.5 Performance Graphs
  10. 9Revision History

Package Options

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

8.2.15.7 Catch Diode

The TPS5410 is designed to operate using an external catch diode between PH and GND. The selected diode must meet the absolute maximum ratings for the application: Reverse voltage must be higher than the maximum voltage at the PH pin, which is VINMAX + 0.5 V. Peak current must be greater than IOUTMAX plus on half the peak-to-peak inductor current. Forward voltage drop should be small for higher efficiencies. It is important to note that the catch diode conduction time is typically longer than the high-side FET on time; therefore, the diode parameters improve the overall efficiency. Additionally, check that the device chosen is capable of dissipating the power losses. For this design, a Diodes, Inc. B340A is chosen, with a reverse voltage of 40 V, forward current of 3 A, and a forward voltage drop of 0.5 V.