SLUUCR2 October   2023 TPSM843620

 

  1.   1
  2.    TPSM843620EVM 6-A, SWIFT™ Regulator Evaluation Module
  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 (SYNC/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  BOM Modifications for Spins
    3. 3.3  Efficiency
    4. 3.4  Output Voltage Regulation
    5. 3.5  Load Transient and Loop Response
    6. 3.6  Output Voltage Ripple
    7. 3.7  Input Voltage Ripple
    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 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

3.5 Load Transient and Loop Response

Figure 3-8 shows the load transient response for the TPSM843620EVM. The current step is from 0 A to 3 A and the current step slew rate is 1 A/µs. An electronic load is used to provide a 3-A step. The VOUT voltage is measured using SMB connector TP12.

Figure 3-9 shows the loop response. Gain and phase plots are shown for VIN voltage of 12 V and a 6-A load.

Figure 3-10 shows the loop gain characteristics with 3 different ramp settings.

Figure 3-11 shows the loop phase characteristics with 3 different ramp settings.

GUID-20231016-SS0I-DHZZ-JFGM-7LBQHB6PTZSF-low.svgFigure 3-8 U1 Transient Response
GUID-20231013-SS0I-X1ZT-1ZSV-MDWR0VFBXRR6-low.svgFigure 3-10 U1 Loop Gain with Different Ramp Settings
GUID-20231013-SS0I-XQRM-PHR0-NKXRH28B41H3-low.svgFigure 3-9 U1 Bode Plot
GUID-20231013-SS0I-C4SG-NJ6Q-JJTSBJFJN3HN-low.svgFigure 3-11 U1 Loop Phase with Different Ramp Settings