When the EN (Enable) pin of the S-19509 Series is OFF, will voltage from the VOUT (Output) side flow back to the VIN (Input) side and damage the IC?

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S-19509Series

A reverse current from VOUT to VIN does occur through the parasitic diode inside the IC, but this will not damage the IC during a normal discharge. However, if an excessive current continues to flow, such as when an external power supply is connected to the VOUT side, there is a possibility of damaging the IC. Please confirm that no overcurrent is flowing.

Updated on 2025-09-26