The feedback resistors set the output voltage of the secondary side and consume the same Iq at a fixed voltage. The design goal for the feedback resistor path is to minimize the resistor error while maintaining a low Iq. For this system example, the feedback network path in this design consumes 0.5 mA to allow enough current for ATL431LI-Q1 biasing. The resistors, R1 and R2, are sized based on a 0.5 mA budget for Iq and Iref. By using the resistor values from Equation 3 and Equation 4, the total power consumption is 10 mW. This can be further decreased by using larger resistors.