For equipment that can be charged using a USB port, such as cell phones and tablets, it is good to have DC over-voltage protection in addition to ESD protection. This will protect the end equipment if the end user accidently grabs the wrong cable, or adapter, and applies a voltage that is too high for the USB port. The TPD1S514-1 is the most recent release, shown on this slide, which also integrates features like surge protection, over temperature protection, and integrated LDO to power the device during dead battery conditions.