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imx6 RTC battery discharges in 10 mins

Question asked by Abraham Varricatt on Nov 11, 2013
Latest reply on Nov 27, 2013 by Abraham Varricatt



I'm using a Lithium Ion cell (5mAh) at PMIC input for RTC backup. Without any external power supply, this cell is  supposed to power RTC domain of iMX6 (we have the iMX6D chipset). SNVS output of PMIC is powering only iMX6 SNVS domain and there is no extra power drain. The theoretical maximum consumption for SNVS domain is 400uA. Which means that the coin cell should last for at least 12 hours. But in practice, it dies after 10mins.


Has anyone seen/experienced anything similar? If so, how did you resolve it?



Abraham V.