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TPS7A37: Turn off Vout waveform with bump symptom

Part Number: TPS7A37


We measure Vout waveform when turn off with full load condition and get the waveform with bump as below.

CH1:Vin CH2:EN CH3:Vout

After install 2.2uF cap on PC54 for EN, the symptom is gone. Please see below:

Can we add cap on EN?

Why there's bump voltage after EN low? Looks like it related to Vin voltage?