SLUUCK9 april   2023 TPSM843B22

 

  1.    TPSM843B22EVM 20-A, Regulator Evaluation Module
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Background
    2. 1.2 Before You Begin
    3. 1.3 Performance Characteristics Summary
  4. 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 (MSEL Pin)
    4. 2.4 Enable, UVLO (EN Pin)
  5. 3Test Setup and Results
    1. 3.1 Input and Output Connections
    2. 3.2 Efficiency
    3. 3.3 Output Voltage Regulation
    4. 3.4 Load Transient and Loop Response
    5. 3.5 Input Voltage Ripple
    6. 3.6 Start-up and Shutdown with EN
    7. 3.7 Start-up and Shutdown with VIN
    8. 3.8 Start-up Into Pre-Bias
    9. 3.9 Thermal Performance
  6. 4Board Layout
    1. 4.1 Layout
  7. 5Schematic and Bill of Materials
    1. 5.1 Schematic
    2. 5.2 Bill of Materials

3.5 Input Voltage Ripple

Figure 3-12 through Figure 3-13 show the TPSM843B22EVM input voltage ripple with no load and 20-A load at VIN = 12 V. The ripple voltage is measured across C12 for U1.

GUID-20230405-SS0I-GXZJ-G5SC-LTRQRFMPB77S-low.gifFigure 3-12 U1 Input Ripple – No Load
GUID-20230405-SS0I-SS6S-WNQD-RWGHNDFMJTWN-low.gifFigure 3-13 U1 Input Ripple – 20-A Load