SLUU381B September   2009  – February 2022 TPS51220A

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Description
    1. 2.1 Typical Applications
    2. 2.2 Features
  4. 3 Electrical Performance Specifications
  5. 4 Schematic
  6. 5 Test Setup
    1. 5.1 Test Equipment
    2. 5.2 Recommended Test Setup
    3. 5.3 List of Test Points
  7. 6 Test Procedure
    1. 6.1 Line/Load Regulation and Efficiency Measurement Procedure
    2. 6.2 Output Ripple Test
    3. 6.3 Measuring Improved Light Load Efficiency
    4. 6.4 Control Architecture and OVP Select
    5. 6.5 Overcurrent Trip Level and Output Discharge Select
  8. 7 Performance Data and Typical Characteristic Curves
    1. 7.1 Efficiency
    2. 7.2 Load Regulation
    3. 7.3 Bode Plot
    4. 7.4 Transient Response
    5. 7.5 Output Ripple and Switch Node
    6. 7.6 Turn-On Waveform
    7. 7.7 Turn-Off Waveform
  9. 8 EVM Assembly Drawing and PCB Layout
  10. 9 List of Materials
  11. 10Revision History

5.3 List of Test Points

Table 5-1 Test Point Functions Found on the TPS51220A EVM-476
TEST POINTNAMEDESCRIPTION
TP1VINMeasurement point for input voltage with respect to TP18
TP2VOUT1Measurement point for output 1 voltage with respect to TP7
TP3VOUT2Measurement point for output 2 voltage with respect to TP8
TP4SW1Output 1 switch node with respect to TP20
TP5VREG55-V/100-mA output, enabled EN is high, use switch S3
TP6SW2Output 2 switch node with respect to TP21
TP7GND1Ground reference for VOUT1
TP8GND2Ground reference for VOUT2
TP9VREG33.3-V/10-mA output should be present when input voltage is applied to EVM.
TP10EN1Output 1 enable signal, will be high when output is enabled via switch S1
TP11EN2Output 2 enable signal, will be high when output is enabled via switch S2
TP12PG1Output 1 power good signal, will be high when output is in regulation
TP13PG2Output 2 power good signal, will be high when output is in regulation
TP14EN5-V and 2-V reference enable signal, high when EVM is enabled with switch S3
TP15VREF22-V internal reference, enabled when EN is high, use switch S3
TP16–Not used
TP17–Not used
TP18GNDINGround reference for VIN
TP19GNDSGeneral ground
TP20GNDGround reference for SW1
TP21GNDGround reference for SW2
TP22GNDGeneral ground
TP23GNDGeneral ground
TP24SYNCNot used