Try this quick and simple upper/lower mixed circuit.
Perform 4-5 rounds of the exercises below with 1-2 mins rest between rounds.
DB Single Arm Rows 10 reps each side
DB Bench Press 10 reps
DB Goblet Squats w 2 second pause at the bottom 10 reps
DB Romanian Deadlifts 10 reps
DB Overhead Presses 10 reps