SNVU818 May   2022 TPS62901-Q1 , TPS62902-Q1 , TPS62903-Q1

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Performance Specification
    2. 1.2 Modifications
      1. 1.2.1 Input and Output Capacitors
      2. 1.2.2 Configurable Enable Threshold Voltage
      3. 1.2.3 SS/TR Capacitor
      4. 1.2.4 Feedforward Capacitor
      5. 1.2.5 MODE/S-CONF Resistor
      6. 1.2.6 Loop Response Measurement
  3. 2Setup
    1. 2.1 Input/Output Connector Descriptions
  4. 3Safety Instructions
  5. 4Test Results
  6. 5 Board Layout
  7. 6Schematic and Bill of Materials
    1. 6.1 Schematic
    2. 6.2 Bill of Materials

1.2 Modifications

The printed-circuit board (PCB) for this EVM is designed to accommodate some user modifications. Additional input and output capacitors can be added. Also, the following modifications can be made:

  • The input voltage at which the IC turns on can be adjusted with two resistors.
  • The soft-start time can be changed.
  • The output voltage can track an applied voltage.
  • A feedforward capacitor can be added.
  • The switching frequency, output discharge setting, MODE setting, and output voltage setting configuration can be changed.

Finally, the loop response can be measured. See the TPS62903-Q1, 3-V to 18-V, Low IQ Buck Converter in 2.2-mm × 2-mm VQFN with Wettable Flank Package data sheet for details of the various settings.