9.3.7 On-Chip Voltage Regulators

dsPIC33AK128MC106 family devices have multiple internal voltage regulators to supply power to the core at 1.1V (typical) and to other system resources.

There are three core voltage domains to provide isolation of power supplies to minimize noise to peripherals. Each of the followings domains have their own linear regulator configured to 1.1V.
  • VREG1 -- CPU core and system logic
  • VREG2 -- ADC
  • VREG3 -- PLLs and FRC

In the event of a device Reset due to the voltage regulators, the RCON[21:19] register bits will report which domain lost voltage regulation.