I am planning to use LT1959 IC for making a voltage regulator circuit for 3V 1A output. The datasheet does not mention maximum allowed value for input capacitor for the circuit.
In order to meet the ripple current requirements for the input capacitor(I RMS(MAX) =I OUT/2 = 0.5A), I am planning to use 7-10 100 uF electrolytic capacitors (in parallel configuration) with 0.1A max ripple current rating. This is because of time and cost constraints. So, my effective input capacitor value would be 1000 uF with 0.7A-1.0A ripple current rating.
I am again going to put about 10 electrolytic caps of 100 uF in parallel for output capacitor. I will also use few 0.1 uF ceramic caps in parallel with the electrolytic output caps. So my effective output capacitor would >1000 uF.
The evaluation board manual for LT1959 demo circuit designed by Linear Technology uses only 25 uF input capacitor and 100 uF output capacitor.
1) Should I be concerned about the relatively high effective capacitance value of input and output capacitors which I am about to use, as compared to the company design?
2) Would there be any other problems in the circuit if I continue with this design?
3) Should I place any extra ceramic input cap in parallel with the input electrolyic caps?
4) Should I place output ceramic cap close to IC or closer to load?