ICL7673
Automatic Battery Back-Up Switch
The Intersil ICL7673 is a monolithic
CMOS battery backup circuit that offers unique performance advantages over conventional means of switching to a backup supply.
The ICL7673 is intended as a low-cost solution for the switching of systems between two power supplies; main and battery backup.
The main application is keep-alive-battery power switching for use in volatile
CMOS RAM memory systems and real time clocks.
In many applications this circuit will represent a low insertion
voltage loss between the supplies and load.
This circuit features low current consumption, wide operating
voltage range, and exceptionally low leakage between inputs.
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