Digi-Key North American Editor Bill Schweber Explains:
To minimize power consumption, a simple MOSFET is often used to gate power to unused circuits. However, a better option is to use a load switch as it has additional functions to handle the many subtleties and vagaries of power-rail management.
Load switches are offered with an array of performance parameters and ratings from multiple vendors, which enables a good fit between application priorities and available parts. http://bit.ly/2HVqSvj