The market for IoT devices is set for explosive growth. Wireless Sensor Nodes in particular are expected to be a large part of this growth. Going from a projected 500 million units in 2014, to more than five billion units in five short years. WSNs are present in a variety of applications from building automation to residential control, factory automation, monitoring environmental conditions, and system operation statuses. In each of these applications, there is a really good chance that the WSN installation will be remote. This leads to the design constraints that were introduced in the beginning. Wireless communication is needed, most often Bluetooth Low Energy due to low power requirements is also needed. Very low power use, as the applications are often self-powered from energy in the environment eliminating battery maintenance. Finally, they often have a very small form factor. It is clear that the next generation WSNs need low power energy harvesting PMIC solutions.