The device is specified from –40 °C to 125 °C for a voltage rating of 2.5 V to 38 V. Because the part is draining at its maximum a current of 17 mA the maximum voltage that can be applied will depend on what is the maximum ambient temperature acceptable for the application. The curve in Figure 8-23 shows the maximum acceptable power supply voltage versus the maximum acceptable ambient temperature.
The Figure 8-23 can also be calculated using the following formulas:
Combining the three equations above gives Equation 4 below:
This equation gives the maximum voltage the part can handle in regards of the ambient temperature.
For example, in the application required to work within a ambient temperature of maximum 85 °C, with TJmax, RθJA and ICCmax are defined in the data sheet, the maximum voltage allowed for this application is determined in Equation 5: