The power supply supervisors monitor the connected power supply and provide the following functionality.
- Power-on reset (POR) — signals the circuit when a supply is connected
- Fixed brownout reset detector (BOR) — holds the system in reset when the voltage is too low for safe operation
- Optional power-fail comparator (POF) — signals the application when the supply voltage drops below a configured threshold
The power supply supervisors are illustrated in the following figure.