Select the output capacitor to limit the capacitive ripple at the output of the regulator. Maximum capacitive ripple is observed at maximum input voltage. The output capacitance required for a ripple voltage ∆VO across the capacitor is given by Equation 16.
Substituting ∆VO, ripple = 10 mV gives COUT = 14 µF. Two standard 10-µF ceramic capacitors in parallel (C8, C9) are selected. An X7R type capacitor with a voltage rating 16 V or higher must be used for COUT (C8, C9) to limit the reduction of capacitance due to DC bias voltage.