A Buck-Linear regulator (also known as a linear regulator with switching preregulator) combines the best of both worlds (efficiency, stability). I can't seem to dampen the filter enough though. I either have to increase the dampening resistance to a considerably unacceptable value, or make the filter with a lower corner frequency - at which moment EC stops working 🤣
P. S. The 1ohm resistor decreases the efficiency a lot. Need some help stabilising the filter...