I want to get an switching regulator IC. I'm looking at Farnell's list and I'm confused: Is there a difference between the types of switching regulators they're selling? I'm interested in the kind that has the greatest efficiency. They're listing those kinds of switching regulators:
Non Isolated Converter,
Step Down (Buck),
I assume they're all "switching" and they're all more effective then linear regulators. Are they actually different and if yes, what's the type that likely has the greatest efficiency?