SNVSA47C February 2016 – December 2020 LM5165
Select the output capacitor to limit the capacitive voltage ripple at the converter output. This is the sinusoidal ripple voltage that arises from the triangular ripple current flowing in the capacitor. Select an output capacitance using Equation 14 to limit the voltage ripple component to 0.5% of the output voltage.
Substituting ΔIL(nom) of 55 mA gives COUT greater than 5 μF. Mindful of the voltage coefficient of ceramic capacitors, select a 22-µF, 10-V capacitor with X7R dielectric in 1206 footprint.