SNVSBJ0A December 2019 – June 2020 LM5170
Soft start can be programmed with a ceramic capacitor CSS. Note that CSS also determines the retry frequency when the converter is an under overvoltage condition (OVPA or OVPB). Because the soft start completes when the SS pin voltage reaches approximately 5 V, the capacitor CSS can be chosen by Equation 78 to limit the full load start-up time within ΔTSS = 2 ms:
Select the closest standard ceramic capacitor, that is, CSS = 10 nF.