SLVU247A July 2008 – October 2021 TPS54331 , TPS54331-Q1
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. 
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 | |