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How to reduce the backup battery power consumption

Question asked by Zhichen Li on Aug 26, 2013
Latest reply on Aug 27, 2013 by Zhichen Li


     Platform: iMX51

     PMIC: MC13892

     Recently the power consumption when powered by backup battery is too high, the current is about 1mA. Even I disable the VSRTC power supply, the current is still about 100uA. But the current I measure in iMX51 demo board is about 20uA. So I need to ask what internal modules in MC13892 are still powered by backup battery when the main power is dropped? As I know the MC13892 RTC, the core circuit and the backup memory are powered, any other modules? If no more modules how can I reduce the power consumption of these modules. Thank you.