SNVU191B October   2012  – December 2021 LMR12020

 

  1.   Trademarks
  2. 1Introduction
  3. 2Features
  4. 3Evaluation Module Schematic
  5. 4Powering and Loading Considerations
    1. 4.1 Quick Start Procedure
    2. 4.2 Starting Up
    3. 4.3 Synchronization
    4. 4.4 No Load Start-Up at High Output Voltage
    5. 4.5 Adjusting the Output Voltage
    6. 4.6 Typical Test Setup
  6. 5Board Images
  7. 6Performance Characteristics
  8. 7Bill of Materials
  9. 8PCB Layout
  10. 9Revision History

4.5 Adjusting the Output Voltage

The output voltage is set using the following equation where Rfbb is connected between the FB pin and GND, and Rfbt is connected between VOUT and FB.

Equation 1. VOUT = VFB(1 + (Rfbt/Rfbb))

Adjusting the output voltage will affect the performance of the LMR12020. In addition, output capacitors might not be rated for the new output voltage. For more information, see the LMR12015/LMR12020 SIMPLE SWITCHER 20Vin, 1.5A/2A Step-Down Voltage Regulator in WSON-10 Data Sheet.