I'm implementing a DC/DC regulator and you can find the datasheet in this link.
What I'm trying to do it's basically reproduce the application note in order to have Vin = 12V and Vout = 5V 1Amp but I'm not understanding how do I choose the inductor. They are saying the value for the inductor is 4,7uH but it seems very subjective.
My very first problem is how do I choose the inductor if I don't know which frequency should I select. It seems I can choose something between (300 kHz to 2 MHz) but how do I know which frequency is the best for my case?
Not only that, for the typical application circuit they have put in the datasheet (pag.1) they have a 2 cells for the Vin which I thinks it's something around 7,4V.
Can someone help me on this?