nrf54L15 sleep current was 3uA using NCS\v2.8.0\zephyr\samples\boards\nordic\system_off

[OPQ]

Hi,

I test my nrf54l15 module(disconnect every gpio with outside),the sleep current was 3uA,seens can't not achieve 0.6uA as the datasheet said.

The nrf54L15's markcode is QFAABB 2435AD.

I testing with the default setting of NCS\v2.8.0\zephyr\samples\boards\nordic\system_off sample.

[OPQ]

FYI,

After update to using NCS2.9.0\zephyr\samples\boards\nordic\system_off sample,the sleep current can reach to 1.1uA.

[Simonr]

1.1µA is pretty good. Are you working on a custom board or an nRF54L15 DK? In your current consumption measurement it seems like the floor current is 0.7µA, but that there are some spikes rather often that seems to wake up the device, so is there something maybe waking the device up pretty often here? A GPIO being triggered or similar?

Best regards,

Simon

[OPQ]

Tested on both  nRF54L15 DK and custom board,their sleep current was the same 1.1uA.

Yes the floor current is 0.7µA,and I don't know what the current spikes was,but i'm sure that was not GPIO triggered,it maybe the IC's internal working state?

[Simonr]

Okay, can you share a closer image of the current consumption graph here so we can take a closer look at these spikes? When you see ~1.1µA current consumption do you still see these spikes?

Best regards,

Simon

[OPQ]

Yes when 1.1uA the spikes still can found,but the interval between two spikes was change from 10ms to 60ms.