Hi, I am working on a little electronics project where I need to convert 15V DC to 5V DC. I was hinted at the LM2576 (datasheet) because it is easy to use and has a built in current limit which is just what I need. The functional block diagram (p12) has a nice display of the internals of the regulator: I am aware of the basic principle underlying the switch regulator, however I do not understand the way the parts do interact (amp, comparator and reset). Could you briefly explain to me the principle of operation of this particular device with respect to the instances shown in the block diagram? I am trying to get some working knowledge in practical electronics and every insight by an electrical engineer would be a big help to me. Thank you.