I want to build a small circuit which will power a pulsating load. I got a power supply which can provide 3.3V and 2 mA. Now my load requirement is 100 micro amp average and 100 mA for 10 mSec(all at 3.3V). I want to calculate 1. Value of capacitor which will provide 100mA for 10 mS 2. Time duration to sufficiently charge the capacitor(to determine after how much time load current surge can be adjusted) Can anybody help me to solve this problem?