If a positive voltage is applied to the output pin of a LM7805 voltage regulator while the input pin is left floating (with 10uF capacitor to ground) will this damage the regulator? If I want a 3.3V supply from say a 9V battery is there any disadvantage in using the output of a 5V regulator as the …

Questions regarding Voltage regulators

CrossRoads January 21, 2013, 3:08pm 7

Take a look at this for a well protected board

Topic		Replies	Views
Protecting Voltage Regulator General Electronics	11	4708	May 6, 2021
Using diodes in LM7805 design circuits General Electronics	9	4042	May 12, 2022
Backfeed diode and LM7805 General Electronics	19	18486	May 6, 2021
Voltage regulators (e.g. LM7805): fed reverse polarity, need info General Electronics	17	4232	May 6, 2021
LM7805CV problem General Electronics	12	1972	May 6, 2021