Wouldn't this work too? (diodes) 3.3V from regulator is more than battery, keeping D2 non-conducting... unless it goes away... and then it conducts to allow battery to supply 3.2V (or less)
Wouldn't this work too? (diodes) 3.3V from regulator is more than battery, keeping D2 non-conducting... unless it goes away... and then it conducts to allow battery to supply 3.2V (or less)