Datasheet

19. SUPC – Supply Controller
19.1 Overview
The Supply Controller (SUPC) manages the voltage reference, power supply and supply monitoring of
the device. It is also able to control two output pins.
The SUPC controls the voltage regulators for the core (VDDCORE) and backup (VDDBU) domains. 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 supports connection of a battery backup to the VBAT power pin. It includes functionality that
enables automatic power switching between main power and battery backup power. This ensures power
to the backup domain when the main battery or power source is unavailable.
The SUPC embeds two Brown-Out Detectors. BOD33 monitors the voltage applied to the device (VDD or
VBAT) and BOD12 monitors the internal voltage to the core (VDDCORE). The BOD33 can monitor the
supply voltage continuously (continuous mode) or periodically (sampling mode), in normal or low power
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.
19.2 Features
• Voltage Regulator System
– Main voltage regulator: LDO or Buck Converter in Active, Standby or Hibernate mode
(MAINVREG)
– Low-Power voltage regulator in Backup mode (LPVREG)
– Controlled VDDCORE voltage slope when changing VDDCORE
• Battery Backup Power Switch
– Automatic switching from main power to battery backup power
• Automatic entry to backup mode when switched to battery backup power
– Automatic switching from battery backup power to main power
• Automatic exit from backup mode when switched back to main power
• Stay in backup mode when switched back to main power
• Voltage Reference System
– Reference voltage for ADC and DAC
– Temperature sensor
• 3.3V Brown-Out Detector (BOD33)
– Programmable threshold
– Threshold value loaded from NVM User Row at startup
– Triggers resets, interrupts, or Battery Backup Power Switch. Action loaded from NVM User Row
– Operating modes:
• Continuous mode
SAM D5x/E5x Family Data Sheet
SUPC – Supply Controller
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 235