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isolated switching regulator
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LaserTazerPhaser:
What are a few decent commonly available switching transformer isolated 5v voltage regulators which can step down high side power rails to 5v for powering a small isolated signal circuit?

Preferably not from Linear Tech since they tend to be very costly and commonly very specialized.
ignislion:
tl494 mc34063  :-//
Dave:
Are we talking about a mains powered circuit? Please specify input voltage range and output power.

For mains powered flyback converters, take a look at the TinySwitch series from Power Integrations. They tend to be fairly cheap.
I think the biggest cost is going to be sourcing a switching transformer to go with it. Those are usually custom wound for the job, so finding the right ones in low quantity is going to be a bit tricky.
LaserTazerPhaser:
Does it matter if 10uF cap is an electrolytic or MLCC? Ceramic caps have very low esr which can cause ringing.
https://www.analog.com/media/en/technical-documentation/data-sheets/LT8302.pdf

ogden:
Question: "Preferably not from Linear Tech since they tend to be very costly"
Answer: https://www.analog.com/media/en/technical-documentation/data-sheets/LT8302.pdf
Not from Linear Tech but Analog Devices, right?  :-DD
Unless you are planning *huge* volume, take DC-DC module like CRE1S0505SC, 2.7$/qty1:


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