SLUU818A April   2012  – February 2022 TPS51219

 

  1.   Trademarks
  2. 1Description
    1. 1.1 Typical Applications
    2. 1.2 Features
  3. 2Electrical Performance Specifications
  4. 3Schematic
  5. 4Test Setup
    1. 4.1 Test Equipment
    2. 4.2 Recommended Test Setup
  6. 5Test Procedure
    1. 5.1 Line/Load Regulation and Efficiency Measurement Procedure
    2. 5.2 List of Test Points
    3. 5.3 Equipment Shutdown
  7. 6Performance Data and Typical Characteristic Curves
    1. 6.1 Efficiency
    2. 6.2 Load Regulation
    3. 6.3 Line Regulation
    4. 6.4 Load Transient
    5. 6.5 Output Ripple
    6. 6.6 Switch Node Voltage
    7. 6.7 Turn-On/Turn-Off Waveform
    8. 6.8 Output 0.5-V Prebias Turnon Waveform
  8. 7EVM Assembly Drawing and PCB Layout
  9. 8Bill of Materials
  10. 9Revision History

5.1 Line/Load Regulation and Efficiency Measurement Procedure

  1. Ensure the load is set to constant resistance mode and to sink 0 ADC.
  2. Ensure SW1 on the EVM is at the OFF position before VIN and V5IN are applied.
  3. Increase VIN from 0 V to 8 V. Use V1 to measure input voltage.
  4. Increase V5IN from 0 V to 5 V. Use V2 to measure input voltage.
  5. Turn SW1 to the ON position to enable the controller.
  6. Vary the load from 0 ADC to 20 ADC; VOUT must remain in load regulation.
  7. Vary VIN from 8 V to 20 V; VOUT must remain in line regulation.
  8. Decrease the load to 0 A.
  9. Turn SW1 to the OFF position to disable the controller.
  10. Decrease V5IN to 0 V.
  11. Decrease VIN to 0 V.