The circuit below shows 3 capacitors in parallel on the input side, and 2 on the output side. Is there a reason for that? or would using a single capacitor (30uF & 660uF) make no difference?
Besides the electrical characteristics of the capacitors there are often considerations on physical size and body style of capacitors to take into account. Some capacitor values are not available in SMT for example. Another consideration would be mounted height above the board where boards are closely mounted to a case, cover or another circuit board.