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

1.3 Performance Characteristics Summary

A summary of the TPSM843B22EVM performance characteristics is provided in Table 1-2. The TPSM843B22EVM is designed and tested for VIN = 4 V to 18 V. Characteristics are given for an input voltage of VIN = 12 V and an output voltage of 1 V, unless otherwise specified. The ambient temperature is room temperature (25°C) for all measurements, unless otherwise noted.

Table 1-2 TPSM843B22EVM Performance Characteristics Summary
SPECIFICATIONTEST CONDITIONSMINTYPMAXUNIT
VIN voltage range11.71212.3V
Input currentVIN = 12 V, IO = 0 A

31

mA
VIN = 5 V, IO = 20 A

4.85

A
Output voltage setpoint1.0V
Output current rangeVIN = 11.7 V to 12.3 V 020A
Line and load regulationVIN = 4 V to 13.2 , IO = 0 A to 20 A±1%
Phase MarginIO =20 A58 degrees
Input ripple voltageIO = 20 A88mVPP
Output rise timeSet by MSEL pin resistor, J5 short pins 3 and 4, 5 and 6, or 9 and 102ms
Current limitSet by MSEL pin resistor, J5 short pins 1 and 2, 3 and 4, 5 and 6, or 7 and 8High
Switching frequency (fSW)Set by FSEL pin resistor, J4 short pins 9 and 101000kHz
Peak efficiencyVIN = 5 V, IO = 4.25 A91.6%
VIN = 12 V, IO = 7 A

87.5%

IC case temperatureVIN = 12 V, IO = 20 A, 10-minute soak88°C