nRF52840 Preview DK v0.9.x

5 V power sources

The nRF52840 Preview DK board has a 5 V boost regulator.

It gives a stable 5 V output from four possible sources:

Each of these sources has a reverse protection diode to prevent current flowing in the wrong direction if multiple sources are connected at the same time.

Figure 1. 5 V regulator and protecting diodes