Hi... I have a circuit in which I am using a 7805 to regulate a 12V DC wall-wart into 5V. Around the 7805, I have a 100uF cap across the input and a 10uF around the output.
Now, I need to have 3V3 also for a particular part. So I'm introducing a LD1117V33 also, using the 5V as input. The question is, do I ALSO need caps across the input and outputs on this regulator? And if so, how do I determine the size of the caps?
Also, I am considering a LP2950-33LPRE3 regulator in place of the LD1117V33 to save space and because 800mA is overkill, 100mA is plenty. Would that change anything wrt the caps?