I noticed that the Inductor selection equations give a larger inductor than what chosen for the design example as well as the webench tool and I was curious if there is more to the equation than
L1= (Vinmax-Vout)/(IoKind)*Vout/(Vinmax*fsw)?
My design space for 1 of these parts is as follows
5V +/- 2%
Iout =0.3A nominal or 0.7A max
Kind =.1
fsw= 330kHz
The equation gives me L=115uH or 50uH
The webench designer gives L = 2.7 uh to 5.5uH
These are pretty different values which has me concerned. I prototyped with a different POL and used 15 uH inductors.
Any insight you have is greatly appreciated
