Hi team,
There is a minimum inductor requirement equation below in LM62440-Q1 datasheet to avoid sub-harmonic oscillation.
There is also maximum inductance requirement based on minimum ripple required (K>10%) for current mode operation.
My application is Automotive and VIN varies from 4.5V to 16V for Vout=3.3V at 2.1MHz Iout=3.7A max.
In case of VIN=4.5V which is highest duty ratio, minimum inductance is calculated to be 0.91uH.
I would like to select from 0.68uH/1uH/2.2uH, but neither of inductance meet both minimum and maximum required value.
In this case, should I relax one of the requirement above?
If so, could you advise how to select the best inductance?
regards,