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

1.2.5 MODE/S-CONF Resistor

R4 selects the following:

  • Switching frequency
  • Output discharge
  • MODE setting
  • Output voltage setting configuration

When selecting a different switching frequency, the inductor value should also be changed. When using the VSET configuration for setting the output voltage, remove R1 and change the value of R2. 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.