To illustrate the calculation procedure, let’s determine equivalent parameters, voltage ripple, and current distribution for a parallel connection of three ceramic capacitors (GRM21BR60J226ME39L ...

And the drop across resistor 1 in the same loop would be the resistance, 40 Ohms, times the current through the resistor, That comes out to a voltage drop of 15 Volts, which makes sense, because ...

Given the proper layout, at around 40% to 60% duty cycle, the two-converter circuit requires half of the capacitance that's needed for a single high-current IC circuit with a 4-A load current.