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, 2:25pm 5

"low parts count" is synonymous with "not very robust"

Agreed.