9.2.7 On-Chip Voltage Regulators

dsPIC33AK256MPS306 family devices have multiple internal voltage regulators powered via the internal Buck regulator (typical) and to other system resources.

There are three voltage domains to provide isolation of power supplies to minimize noise to peripherals. Each of the following domains has its own linear regulator configured to 1.1V.

  • VREG2 – ADC
  • VREG3 – PLLs and FRC
  • VREG4 – FEP

In the event of a device Reset due to the voltage regulators, the RCON[22:20] register bits will report which domain lost voltage regulation.