That depends on the infants condition.
In case of a stable infant that needs intubation for surgery or anything like this, I use a small dose Propofol (1-2 mg/kg) followed by Fentanyl (2-3 µg/kg) and Rocuronium in the higher dose (1 mg/kg). Sufentanil 0,5 µg/kg instead of Fentanyl is an option when early extubation is needed.
In case of a sick infant (sepsis,.....) I rather use Ketamin 0,5 - 1 mg/kg alone or no meds because the neonate may not be that vigourus and the above mentioned medication may even depress the baby more than I want.
I never use Atropine.