SLUUCH6B september   2022  – september 2023 TPS543B22

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Background
    2. 1.2 Before You Begin
    3. 1.3 Performance Characteristics Summary
  5. 2Configurations and Modifications
    1. 2.1 Output Voltage
    2. 2.2 Switching Frequency (FSEL Pin)
    3. 2.3 Current Limit, Soft-Start Time, and Internal Compensation (MODE Pin)
    4. 2.4 Adjustable UVLO
  6. 3Test Setup and Results
    1. 3.1  Input/Output Connections
    2. 3.2  Efficiency
    3. 3.3  Output Voltage Regulation
    4. 3.4  Load Transient and Loop Response
    5. 3.5  Output Voltage Ripple
    6. 3.6  Input Voltage Ripple
    7. 3.7  Synchronizing to a Clock
    8. 3.8  Start-up and Shutdown with EN
    9. 3.9  Start-up and Shutdown with VIN
    10. 3.10 Start-up Into Pre-Bias
    11. 3.11 Hiccup Current Limit
    12. 3.12 Thermal Performance
  7. 4Board Layout
    1. 4.1 Layout
  8. 5Schematic and Bill of Materials
    1. 5.1 Schematic
    2. 5.2 Bill of Materials
  9. 6Revision History

2 Configurations and Modifications

These evaluation modules are designed to provide access to the features of the TPS543B22. The U2 design provides jumpers for testing different configurations. Jumper selections must be made prior to enabling the TPS543B22.

If a desired configuration is not available, then some modifications can be made to this module. When modifications are made to the components on the EVM, the internal compensation option selected with the MODE pin resistor needs to be changed. Changes to the fSW, output voltage, output inductor, and output capacitors require a change in the compensation. TPS543B22 data sheet equations or WEBENCH can be used to calculate the output capacitor value, compensation, fSW, and inductance. Verify all components have sufficient voltage and current ratings.