I have a couple questions about boost and buck converters.
First, do they try to hold the output voltage constant, or do they alter the input voltage by a constant factor? For example, if I change the input voltage, will the output voltage change?
Secondly, what happens when you give a higher voltage than you're trying to achieve to the input of a boost converter (or a lower voltage to a buck converter)? For instance, let's say I was trying to use a buck converter to convert some voltage to five volts. What would happen if I gave it 3.3 volts on the input?