I'm using ST1S14PHR like the attached schematic, but with an input between about 10V and 20V the output is instable and appears 2.8/3.2V ...sometimes after a few seconds the stable situation at 5V is reached.
After the ST1S there is a linear 3v3 regulator that with the instable input has an instable output.
Absorption at 24V is about 30mA.
What could be the problem?
thanks...
