Hi Vaclav,

The load is appropriate, (almost 30% of full load). I am keen to help you, but have few queries:

1) Are you sure it is regulator which is oscillating, and not any other component (connected as load to regulator o/p)? You can simply check this by replacing the active loads with a resistor (which draws approx the same current).

2) what is the i/p voltage to the regulaotr at -15 C?

3) Is the I/P clean and free of noise?

It would be more helpful to diagnose, if you can email me the schematic diagram.


Regards

IA