Depending on the application, there can be a significant amount of high frequency noise on the power supply line. If high frequency noise (>100kHz) is present, the user can switch to a 1μF bypass capacitor to provide additional filtering on the power supply line. Increasing the bypass capacitance or choosing a capacitor with a lower ESR across frequency improves PSRR performance.

An additional power supply consideration is line regulation. For the ISOTMP35-Q1, line regulation refers to the change in output temperature with changing power supply. Figure 5-6 shows that, across the entire environment temperature range, ISOTMP35-Q1 maintains a steady amount change in temperature across V_DD.