There are three power supply options for the Power Profiler Kit (PPK) digital logic and for the Device Under Test (DUT).
The power supply options are:
The power supply is selected using the power select switch (SW4).
The PPK onboard voltage regulator is supplied by the 5 V USB power supply. Its output can be adjusted between 1.8 – 3.6 V through the Power Profiler app.
If an external power supply is used, the voltage is applied directly to the circuits without regulation. This voltage must be limited to the 1.8 – 3.6 V range.
When the DK is selected as the power supply, the DK supplies the PPK circuitry.
The analog part of the automatic switch circuitry requires a 5 V power supply. When the PPK is connected to an nRF5 DK, the 5 V is supplied by the DK. When the PPK is used standalone, a USB cable has to be connected to supply the 5 V required by the circuitry.