nrf52832 RTC SYSTEMOFF power comsumption

[MAIDB]

Here I am working on NRF52832 + SDK15。

I have designed two board with different 52832 package (N52832-CIAAB0 and N52832-QFAAB0), I have disabled all peripheral part and test CPU power consumption.

I used same software，but I found power consumption is different：

SYSTEMOFF mode:     23uA(N52832-CIAAB0 )   and 145uA(N52832-QFAAB0)

SLEEP           mode:     2.25mA(N52832-CIAAB0 )   and 2.17mA(N52832-QFAAB0)

I want to know if these two board's power consumption is normal.

And I have a question about RTC and systemoff mode:

       I am using RTC2, I want to know if RTC is still working in systemoff mode. And I want to know how to keep RTC time when system wake up from systemoff mode.

Thanks

Frank

[MAIDB]

I am using external LDO, not DCDC.