SLVUAH4A August 2015 – October 2021 TPS54334
The voltage divider, R5 and R6, is used to set the output voltage. To change the output voltage of the EVM, it is necessary to 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. Use 31.6 kΩ for R5.
Table 1-3 lists the R5 and R6 values for some common output voltages. Note that VIN must be in a range so that the minimum on-time is greater than 145 ns, and the maximum duty cycle is less than 100%. The values given in Table 1-3 are standard values, not the exact value calculated using Equation 1.
Output Voltage (V) | R5 Value (kΩ) | R6 Value (kΩ) | |
---|---|---|---|
1.8 | 31.6 | 25.5 | |
2.5 | 31.6 | 15 | |
3.3 | 31.6 | 10 |