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For LDOs without a discharge function at the EN (CTL, STBY, CE) pin, if EN falls while the Vo pin is in a no-load state is there a path for discharging the charge of the output capacitor other than through the feedback resistor?
When there is no load at the Vo pin, when EN falls the discharge path is only through the feedback resistor, and the output voltage drops with the capacitor through the time constant. However, when VCC is turned OFF, the charge at the Vo pin is discharged and the VCC (Vin) voltage drops due to the parasitic diode between the Vo and VCC (Vin) pins.Related Link:Technical Document