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TL431 linear power supply
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not1xor1:
I unsuccessfully tried to use the other TL431 models (LTspice reported some error messages). Probably the problem was due to the symbols (.asy files) I used.

I did not investigate further for lack of time, but I tend to trust the model I used previously much more than the others as it was provided by TI.

This last simple schematic seems to work under a range of loads and feedback resistors. If I had to build a TL431 variable voltage PSU (I wouldn't call that a bench PSU), I would start from this circuit.

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