A Tape and Reel package is used to package the power management. In this PMIC, you can find TSOT functions for your reference. There are 8 pins on the power managment ic. There should be a minimum voltage supply (Vsup) of 500mV for this PMIC. The maximum supply voltage (Vsup) in this PMIC should not exceed 6V volts.
LTC2909ITS8-5#TRM Features
Minimum supply voltage of 500mV
LTC2909ITS8-5#TRM Applications
There are a lot of Analog Devices, Inc. LTC2909ITS8-5#TRM Voltage Supervisors applications.