[Radio Wrangler]

TV line output stages use the inductive back-emf pulse created when the scan current abruptly reverses for flyback to create a high voltage pulse AND it uses a step-up transformer turns ratio to magnify the voltage even further.

So you can have a boost converter making an increased voltage with just a single inductor, but you can use the same thing with a transformer to provide isolation and the turns ratio can be used to step the voltage up further, or can be used to step the voltage back down. They also get called flyback converters.

A derivative of the boost is the SEPIC which has the ability to output a voltage from less than the input voltage, to more than it, and it's smoothly adjustable.

You've just opened the door on a whole family of converters. Once you understand the basic boost, you get several others for free.

David