SLVUB76A July 2017 – October 2021 TPS54335A
The voltage divider, R7 and R8, is used to set the output voltage. To change the output voltage of the EVM, it is necessary to change the value of resistor R8. Changing the value of R8 can change the output voltage above 0.8 V. The value of R8 for a specific output voltage can be calculated using Equation 1. Use 100 kΩ for R7.
Table 1-3 lists the R9 and R10 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) | R7 VALUE (kΩ) | R8 VALUE (kΩ) | |
---|---|---|---|
1.2 | 100 | 200 | |
1.8 | 100 | 80.6 | |
2.5 | 100 | 47.5 | |
3.3 | 100 | 32.4 | |
5.0 | 100 | 19.1 |