There are three voltage dividers in the system that allow the MCU to monitor V_SYS, VIN_FLT, and PS_ID. The V_SYS and VIN_FLT dividers output a scaled voltage based on the input to the dividers. Figure 2-8 shows the scaled voltage. All three of the dividers also include a Schottky barrier diode to provide overvoltage protection to the MCU.

Figure 2-8 Voltage Sensing Schematic

The PS_ID pin is made available here as well. This type of pin is commonly included in barrel jack input adapters and provides a specific voltage based on the voltage and current capability of the adapter.