LMR43610-Q1: IC input current

Hi Thomas,

It is a buck circuit and the max input current is the function of Vin, Vout, power inductor, switching frequency,  and the peak current limit.  

A quick estimation:

D=Vo/Vin

IL_ripple = Vo x (1-D) / (fsw x Lo)

Iin_max = D x ( Ipk_limit - 0.5* IL_ripple)

Hope this clarifies. 

Thanks,

Youhao