Power for Servos

I'm working on a robotic arm with 6 servos (MG996R). The servos take 5V and may pull 3 amps at once if they're all working. What's my best bet to step down the 7.5V - 8V battery voltage down to 5V to drive them? I'm a little out of my league here on the electronics side. I don't want to fry anything. I'll probably also tap off of this 5V to get power to an 328P.

Yes, you need a step-down regulator rated for 3 Amps or more.

DVDdoug: Yes, you need a step-down regulator rated for 3 Amps or more.

Yeah, I was hoping someone might have a suggestion for one in particular.

Like would this be appropriate?

http://www.mouser.com/ProductDetail/ON-Semiconductor/MC34166TG/?qs=sGAEpiMZZMtitjHzVIkrqdfdkrf0Qy0QSHZ43qatLbo%3d

My electronics isn't nearly as good as my coding. I'm having a hard time telling from the many configurations in the datasheet what other components I need to go with it. I've never dealt with switching power supplies before.