I have got the following parameters for a buck regulator and am attempting to find a suitable inductor:
Vi = 3.6 Vo = 1.8 Imax = 1.5 Fsw = 56000 Iripple = 0.45
Plugging all these into the inductance value formula:
L = ((Vin - Vout) * Vout) / (Vin * Fsw * Iripple) L = 35.714
I know I've got to consider the current ratings of the inductor (with the peak current of
Imax + (Iripple / 2 ) = 1.725A). If I use this 1.725A and ensure the peak saturation of an inductor is above this (by some safety margin as well), do I still have to consider the RMS current of the inductor. If so, what minimum values should I be requiring considering the above parameters and how do I calculate them?