From Seth Kerr of Oak Dev Tech:
Getting Started With The TPS22917 Load Switch
Trying to figure out how to reduce the power consumption of your project with multiple peripherals can be tricky, especially if these peripherals are operating off different power supplies than your main controller. This is where the easy to use TPS22917 Power Switch/Load Driver from Texas Instruments comes in.Packed into a tiny SOT23 package, the TPS22917 is compact enough to fit into any project, requiring just four total components including the main IC. Combined together on a small breakout board, we then have an easy to use form factor that can be used to easily integrate it right into your project without the extra hassle.
In this tutorial we’re going to show you how easily it is to use our TPS22917 breakout board in your project.