I found min inductor required for Buck converter using this formula,
We usually take 40% buffer on the calculated minimum inductance value(so, that inductance at rated current will not vary much and ripple will be under control) and choose the inductor.
I think lower inductor values will have more ripple, good transient response, as inductor value increases less ripple--> less pressure on Output capacitors.
Is there any higher limit on the inductor value for a buck converter.
I have requirement like this,
Vin =10.8 -13.2V,typ =12V, vout = 0.9V, Iout =15A, ripple =30%, Vout ripple =2.5% and possible transients can occur up to 10A/2us.
I have seen in webench tool from TI where maximum value of inductor specified, but not sure how they have calculated..