Hi Tom,
Welcome to the forum!
The Pololu regulator should work if your 24 V input is DC, it’s quoted to be able to deliver 5V which is the operating voltage of the Pi boards.
The reason that all of the Pi PSU’s output 5.1V is to ensure that the CPU is not limited by the lower voltage (called voltage droop when high current is drawn).
Personally I would go with this regulator as the features offer slightly more protection to the Pi in the form of thermal protection(to ensure that it is able to maintain its full current output a heatsink might be necessary) in comparison to CE05572.
Cheers,
Liam.
