Peter Belleau

PCF2129 Battery Leakage Current Prevention

Discussion created by Peter Belleau on Apr 13, 2016


I have a customer who wants to use the PCF2129 RTC which has a battery backup function and have a couple questions:

1) is the specification on page 59 of the datasheet 'Battery Leakage Current' mean current INTO the battery, or in to the IC, as might be caused by the ESD diodes on the VBAT pin for example? The spec says 100nA maximum.

2) If this spec means current leaking out of the VBAT pin and into the battery, is there a good low leakage diode that someone can recommend that doesn't have a large forward voltage drop?

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