SLUUD96 February   2025

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Input and Output Connections
  8. 3Implementation Results
    1. 3.1 Test Setup and Results
      1. 3.1.1 Start-Up Procedure
      2. 3.1.2 Load Transient Response
      3. 3.1.3 Start-Up
      4. 3.1.4 Shutdown
      5. 3.1.5 Output Voltage Ripple
    2. 3.2 Output Voltage Setpoint
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 Layout
    3. 4.3 Bill of Materials
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Reference

3.2 Output Voltage Setpoint

The output voltage of the EVM can be selected by changing the value of resistor R4 (RFBT) and R5 (RFBB). TI recommends using 1% tolerance or better divider resistors. Start with a 100kΩ for R4 (RFBT) and use the following equation to calculate R5 (RFBB). To improve efficiency at light loads, consider using larger value resistors. If the values are too high, the regulator is more susceptible to noise and voltage errors from the FB input current are noticeable.

Equation 1. R 4   =   R 5   ×   V o u t   -   0 . 596 V 0 . 596 V