I am looking at the following two datasheets:
The application circuit for the first component asks for a 4.7uF polarised cap, which I am assuming to simply be an electrolytic cap.
The application circuit for the second component asks for a 0.1uF polarised cap - again assuming to be an electrolytic cap. What I'm finding strange is that there aren't a great deal of elec. caps of this capacitance compared to MLCCs.
Is there any justification for either of these components to be specifying polarised caps, or would ceramic caps be just as suitable? If so, why use a symbol for polarised caps?