If you look at the data sheet the P will work to a lower voltage (hence less power) if necessary.
The P will work down to 1.8V where as the ordinary type will work down to 2.7V
If you look at the data sheet the P will work to a lower voltage (hence less power) if necessary.
The P will work down to 1.8V where as the ordinary type will work down to 2.7V