LM2831: Switching frequency

Hi Carlo,

If we refer to the datasheet of the recommended inductor, the inductance vs frequency graph shows that the inductance remains nearly constant at 1.6uH up to 90MHz approximately. Please see the screenshot attached below.  

You can use the formula below for calculating the value of the inductor. I would recommend to look into this app note for more details about it.

https://www.ti.com/lit/an/slva477b/slva477b.pdf?ts=1640625573987&ref_url=https%253A%252F%252Fwww.google.com%252F

Let me know if you have further questions on this.

Thank you!

Best regards

Sneha