The nRF7002 DK has a 5 V boost regulator.
It gives a stable 5 V output from the following four possible sources:
- USB connector J2 for the interface MCU
- USB connector J3 for the nRF5340 application MCU
- Lithium-polymer (Li-Poly) battery connectors (J6 or P21)
- VIN 3–5V pin on P20
Each source 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
CAUTION:
Reverse protection is not applied if the
SW10 switch is moved to Li-Poly. In this case, the power is routed directly to the
VBAT of the nRF7002 DK. Care must be taken not to apply an external voltage in
reverse, as this might damage the DK circuitry.