The feedback resistors set the output voltage of the secondary side and will 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 will consume 0.5 mA to allow enough current for ATL431LI 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 will be 10mW and this can be further decreased by using larger resistors.