buck converter help

[drobbins329]

I am working on understanding an example circuit.
My current hang up is the inductor used in a buck converter circuit. The circuit i am working at is the li-ion msp430 charger example given by ti. I cant understand where they found the value for the inductor. I cant find any examples i could understand on wiki.

 

[(*steve*)]

Do you have the datasheet for this device? What does it say about the selection of the inductor?

I'm a little confused because TI says the MSP430 is a microcontroller.

 

[drobbins329]

It is a microcontroller.
Here is the link: http://www.ti.com/litv/pdf/slaa287

I am using it because I already have one. And, I could use a charger. When I can learn something new, I would rather build than buy.

I am using the micro controller as the switch.