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Battery protection for PCF85263A

Question asked by Frans Jan van Donselaar on Dec 18, 2017
Latest reply on Feb 8, 2018 by Pieter Simons

Does a battery (CR2032 button cell) need extra protection like a diode and current limiting resistor when this battery is connected to the PCF85263A? The explanation of the battery switch circuit inside the PCF85263A is very minimal.

 

Additional question: What is the leakage current on VBAT when VDD is active?

 

The typical application (datasheet):

Needed according to UL:

 

Proposed application:

 

Thanks,

Frans Jan

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