Electronics & Electrical Engineering Forum:
LDO heating up
I want to build a circuit like that shown in the picture. I haven’t assembled it yet, instead I have made a small test circuit for the LDO to measure its correct operation. I have noticed one thing, if I don’t apply the voltmeter terminals to the circuit, the LDO gets very hot with the danger of burning up. As you can see on my circuit, in the neutral switcher state the LDO doesn’t have any current consumer to convey its current to. The batteries will be all the time inserted, of course. Do I take a risk of burning the LDO?