Determine voltage regulators for a circuit
If the stall current is 1.6A, then the motor can reach it and/or come close to it during operation under heavy loads. Therefore, you need to be able to deliver that peak current. If possible, go above 1.6A, say 1.8A which gives you extra 12% margin. Always choose your components so that they can withstand critical conditions that may arise during operation, otherwise some unpleasant surprises can occur