Hardware description
4.3.2 VDD power sources
The main supply voltage (VDD) is sourced from the 5 V domain, external power supply, and coin cell
battery.
For the 5 V domain, there are two regulators, one fixed 3 V buck regulator and one voltage follower
regulator that follows the VDD_nRF voltage. The coin cell battery and external power supply are not
regulated.
• 5 V domain:
• Fixed 3 V buck regulator
• VDD_nRF voltage follower
• External power supply
• Coin cell battery
For more information about power sources, see nRF5340 power source on page 17.
The power sources are routed through a set of load switches, which are controlled by logic to prioritize the
power sources in the correct manner.
If the high voltage regulator of the nRF5340 is used, the DK is supplied from the VDD_nRF voltage follower
regardless of the state of the other power sources.
4406_638
14
To Next Page
Loading...
Need help?
General
