The Supply Controller (SUPC) manages the voltage reference and power supply of the device.

The SUPC controls the voltage regulators for the core (VDDCORE) domain. It sets the voltage regulators according to the sleep modes, or the user configuration. In active mode, the voltage regulators can be selected on the fly between LDO (low-dropout) type regulator or Buck converter.

The SUPC embeds two Brown-Out Detectors. BOD33 monitors the voltage applied to the device (VDD) and BOD12 monitors the internal voltage to the core (VDDCORE). The BOD can monitor the supply voltage continuously (continuous mode) or periodically (sampling mode).

The SUPC generates also a selectable reference voltage and a voltage dependent on the temperature which can be used by analog modules like the ADC or DAC.