Still working away at it in my spare time, but a lot of small things are catching me out.

The latest is the ISO124, a 21 year old IC, with extended requirements for bypassing and output filtering:

It's not that it's difficult to implement, but the assumption that it this sort of IC conditioning wouldn't be necessary is what now requires me to rework some of the design.

This IC also makes all of its electrical claims with only a 2kohm load - Do I need this?! Can I buffer the output and improve the specs - Or does it make them worse?! I'm not going to make more assumptions. Working backwards from examples gives clues, but it is frustrating.

The 2k load then has a cascading effect on the power budget and so on, which is causing continual annoyances.

More to come soon.