I am thinking about utilizing a step-down regulator chip for a synchronous buck converter. I figured a basic laptop power supply would work for this (fit some connectors on it). I have done the simulations utilizing a 12v DC supply for the chip. At max duty cycle (99%), the input current pulls just under 6 amps. Does this mean I would need a 12V 6A supply? Application is battery charging, so I'm using it to produce a consistent output current. Just a bit confused, know basic buck theory but not as familiar with chips.