how long is he up for before you put him back to bed????
bubs this age only last around an hour and that time included feeding,burping, changing ,settling.
maybe try putting him down earlier
Yep, my DS2 could only handle 45 minutes of wake time at this age (and yep, that included feeding, etc), as soon as he showed tired signs I'd wrap him and put him straight to bed. It felt like I barely saw him!

DS1 was a poor day sleeper unless I held him so we bought a baby hammock and it changed our lives! I could put him in it and bounce him off to sleep and he would sleep for much longer in it.