Please find attached TSOT functions for your reference in this IC power. 8 pins are on the supervisor. It is recommended that Vsup should not be less than 500mV for this IC power. The maximum supply voltage (Vsup) is not to exceed 6V volts in this IC management.
LTC2909ITS8-3.3#TRM Features
Minimum supply voltage of 500mV
LTC2909ITS8-3.3#TRM Applications
There are a lot of Analog Devices, Inc. LTC2909ITS8-3.3#TRM Voltage Supervisors applications.