The output capacitor is selected based on the output voltage ripple requirement. In this design, 0.1% voltage ripple is assumed. Based on the 0.1% ripple requirement, the capacitor value can be selected based on Equation 15.
Considering the tolerance and temperature effect, together the ripple current rating of the capacitors, 3 parallel 680-µF capacitors are selected for the output.
After the basic power stage is designed, the surrounding controller components can be selected.