Hey Kevin,
Unfortunately, our the external components table in the DRV10983 datasheet, shows that a 47µH, 1.15 current rating and saturation current (with <1ohm DC resistance) is necessary. I've copied the table below.
Essentially, the switching regulator was designed with 47µH in mind (i.e. for the transfer function of the buck). This means the 100µH/1.4A should not be used. Our validation of the part showed that we would get up to 1.15A when testing VREG. If a lower current rated inductor is chosen (e.g. 47µH/1A), then there is a risk that the current will ramp above the rating, the inductor will saturate, and VREG will not work as expected.
We also know that inductor selection is a larger problem because inductors of these specifications are both large in size and expensive. We will address this for future devices.
Thanks,
-Cole
