IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3, SOT-23, 3 PIN, Power Management Circuit
1-Ch Power Supply Monitor IC, 3.93V-4.06V Threshold, 5.5V Max, SC-70, SM

IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4, TO-253AA, SOT-143, 4 PIN, Power Management Circuit
Microprocessor Supervisory IC, 4.56V-4.7V, Active-High Push-Pull, SOT-23-3