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

2.3 Current Limit, Soft-Start Time, and Internal Compensation (MODE Pin)

In the U2 design, jumper J9 can be used to select between the current limit, soft-start time, and internal compensation options shown in Table 2-3. If the desired option is not available, change one of the resistors to the value which sets the desired option.

In the U1 design, change the MODE resistor to the value which sets the desired option.

Table 2-3 MODE Selection
JUMPER SETTINGMODE RESISTORCURRENT LIMITSOFT-START TIMERAMP
1 to 2 pin shorted2.21 kΩHigh2 ms1 pF
3 to 4 pin shorted(1)4.87 kΩHigh2 ms2 pF
5 to 6 pin shorted11.3 kΩHigh2 ms4 pF
7 to 8 pin shorted60.4 kΩLow2 ms2 pF
(1) Default Setting