The LM317 does not have a ground connection.
If you limit the voltage between its input and output to 40V then its input could be 50V and its output could be 10V to 47V.
But then it gets fried if the output is shorted to ground.
I was looking at this:
**broken link removed**
and
LM317 - Wikipedia, the free encyclopedia
And it says the max input voltage is 40v. Are they wrong or is the datasheet being interpreted wrong?
The way the datasheet looks as long as the difference is 40 it should work. As in I can input a max of 80V and output 40V(80-40=40)max. But they are stating the input is max of 40.
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