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I am making a 9 volt battery powered USB charger for my friends phone. I need some help as I am using a buck converter.

I am not sure how I would attach this and what each of the pins on the buck converter does.  I could have made one out of a 5 volt regulator, or this:  http://tinyurl.com/switch-regulator, but I don't have $15 (I have no source of income) to spend on my friends gift and I want it to be highly efficient.  I am waiting for the buck converter to show up in the mail right now.  The datasheet for the buck converter is: http://tinyurl.com/buck-converter.  Also, I found a website that sells the kits for these: http://tinyurl.com/9v-charger for 16 dollars, but once again I don't have any money.  I want to make a charger like the one they have on there out of free samples. 

Thanks for the help,
Mike

P.S.  My friend has an android.