How to get LO to sleep the night?

My LO currently goes to bed between 7pm-8pm, then wakes for a feed at about 12ish then is wide awake ready to start the day from 4am onwards and there’s no settling him back to sleep then. I’m starting to get really tired of these early mornings and struggling with what to do. He’s fed 180ml bottles (210 with powder difference) every 3 hours during the day but he leaves about 50ml per bottle