There are some great reasons to use load switch ICs. First, they can reduce system power consumption. For example, they can disable power to subsystems that would otherwise be on. Second, load switches can be used for power sequencing for certain subsystems that need to be turned on and off in a particular order. Finally, these load switches provide valuable functions that are difficult to implement with discretes, such as overcurrent protection and overtemperature protection, as well as a variety of other features.