For the best output and input voltage filtering, ceramic capacitors are required. The input capacitor minimizes input voltage ripple, suppresses input voltage spikes, and provides a stable system rail for the device. A 4.7-µF or larger input capacitor is required. The output capacitor value can range from 10 µF up to 47 µF. The recommended typical output capacitor value is 2 × 10-µF or 1 × 22-µF with an X5R or X7R dielectric. Values over 47 µF can degrade the loop stability of the converter. A feedforward capacitor is required for best transient performance.

Ceramic capacitors have a DC-Bias effect, which has a strong influence on the final effective capacitance. Choose the right capacitor carefully in combination with considering its package size and voltage rating. Ensure that the effective input capacitance is at least 3 µF and the effective output capacitance is at least 5 µF.