Tearing up Pad

My puppy is tearing up his pad during the night.

This is an indication that he is bored with his situation at night.  There are some things you can try now and a solution you may be able to employ soon.  If you can pinpoint whether this is shortly after putting him in or if it is before you return to let him out might help in trying to eliminate it.  Be sure he has plenty of activity prior to retiring, and include a couple indestructible toys  such as Starmark Everlasting Treat,  Kong Quest or Traxx,  Nylabone Romp n Chomp or processed bones or antlers (Blue Buffalo).  Using spray chew deterrents is helpful for some pups as long as it does not discourage use of the pad for elimination.  If he is using his pad well for elimination you can add a collapsable play pen to enlarge his area and give him another place to go thereby reducing boredom.  Many times it is best to have a second tray and pad in the pen to make it easier to maintain the pad training idea.

It seems that he is doing this around 4 am.  Should I try the toys you suggested?

The only choices you have for the middle of the night tantrum would be to try the toys or get him out and have a play period which has its own set of problems both for you and his training.  The toys I suggested are all "interactive" in that they have stored treats that take time and effort on his part to resolve.  They are all good, the Starmark Fireplug worked well for my puppy.