SLVU247A July   2008  – October 2021 TPS54331 , TPS54331-Q1

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Performance Specification Summary
    3. 1.3 Modifications
      1. 1.3.1 Output Voltage Set Point
  3. 2Test Setup and Results
    1. 2.1 Input and Output Connections
    2. 2.2 Efficiency
    3. 2.3 Output Voltage Load Regulation
    4. 2.4 Output Voltage Line Regulation
    5. 2.5 Load Transients
    6. 2.6 Loop Characteristics
    7. 2.7 Output Voltage Ripple
    8. 2.8 Input Voltage Ripple
    9. 2.9 Powering Up
  4. 3Board Layout
    1. 3.1 Layout
  5. 4Schematic and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Bill of Materials
  6. 5Revision History

1.3.1 Output Voltage Set Point

To change the output voltage of the EVMs, change the value of resistor R6. Changing the value of R6 can change the output voltage above 0.8 V. The value of R6 for a specific output voltage can be calculated using Equation 1.

Equation 1. GUID-60374586-E468-405E-B7EF-EEB758DF805F-low.gif

Table 1-3 lists the R6 values for some common output voltages. Note that VIN must be in a range so that the minimum on time is greater than 150 ns, and the maximum duty cycle is less than 93%. The values given in Table 1-3 are standard values, not the exact value calculated using Table 1-3.

Table 1-3 Output Voltages Available
Output Voltage (V) R2 Value (kΩ)
1.8 8.25
2.5 4.75
3.3 3.24
5 1.96