LMR33610: Inductor Selection, what I_out(max) value used for calculation

Hello Marshall,

Thanks for the clarification.

1A will result with a 24.3uH. Will need to use the next standard value of 27uH. Just curious this value is larger than suggested 10uH on the typical component values. I don't think this is an issue for design/operation, except for higher cost and board space. Also it's well below the maximum inductance limit Lmax=75.9uH (calculated from minimum inductor ripple of 10% of max device current). Let me know what you think.

Thanks,

Fil

Hi Fil,

You are welcome.

I will check into if that can be corrected, as it does sound like that is an error (mistaken copy and paste from 3A variant).

You should be to get a modest size inductor considering the low peak current limit in this device.

If you do find your inductor size at ~27uH is too large, you may want to consider 2.2MHz switching frequency or a power module such as TPSM33615.

27uH seems reasonable for your design.

I appreciate the help. 

You are welcome.