5.6 Shutdown (SHDN) Pin

The purpose of the SHDN pin is to control the enable signal typically found on the voltage regulator. Depending on the application use case and needs in terms of Low-Power mode and power supply strategy, the SHDN pin can be asserted low (SUPC_CR.SHDWEOF=1 or SUPC_CR.SHDW=1) when the device enters Backup mode. At wake-up event detection, the SHDN pin is asserted high, and thus re-enables the external voltage regulator. See Typical Powering Schematics in the section Power Supply and Power Control for more details.