SBVU066A August   2020  – April 2021 TPS51397A

 

  1.   Trademarks
  2. 1Introduction
  3. 2Performance Specification Summary
  4. 3Modifications
    1. 3.1 Output Voltage Setpoint
    2. 3.2 Mode Selection
  5. 4Test Setup and Results
    1. 4.1 Input/Output Connections
    2. 4.2 Start-Up
    3. 4.3 Shutdown
    4. 4.4 Load Transient Response
    5. 4.5 Output Voltage Ripple
  6. 5Board Layout
    1. 5.1 Layout
  7. 6Schematic and Bill of Materials
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
  8. 7References
  9. 8Revision History

3.1 Output Voltage Setpoint

The output voltage is set by the resistor divider network of R4 (R(TOP)) and R6 (R(BOT)). R6 is fixed at 15.0 kΩ. To change the output voltage of the EVM, it is necessary to change the value of resistor R4. Changing the value of R4 can change the output voltage above the 0.6-V reference voltage VREF. The value of R4 for a specific output voltage can be calculated using Equation 1.

Equation 1. GUID-54322C17-AE56-453A-BAF0-804BD74133E0-low.gif