RT1170 EVK - How to reduce standby current?

[chongwoonjiet]

Hi there

I am using SDK example project evkmimxrt1170_power_mode_switch_bm_core0 and evkmimxrt1170_power_mode_switch_bm_core1. I set typical set point("A") and setpoint 15("N"), the standby current measured is around 100mA. I measured PMIC_ON_REQ voltage, it is around 1.8V.

1. Is this value of 100mA normal? Did I missed some settings?

2. I have a requirement by customer to reduce standby current to less than 2mA. Any settings are needed to achieve this?

Thanks for reading. Please help if anyone have idea.

[Lghtdhff_456]

I am using sdk power mode switch example core 0 only . sdk e.g work fine but same configuration I did in my code I get stuck in  bus fault handler at switchflexspiroot() . did we need to configure any other things also when we used sdk e.g code . I am using set point 15 please help me how I resolved this issue .

[gusarambula · Accepted solution]

Hello chongwoonjiet,

There are a couple of measurements on the i.MXRT1170 datasheet in section 4.1.5 (Typical power mode supply current).

https://www.nxp.com/docs/en/data-sheet/IMXRT1170CEC.pdf

As for how to setup these low power modes, AN13148 covers this In a bit more detail.

https://www.nxp.com/docs/en/application-note/AN13148.pdf

Achieving 2mA in standby would require to power gate most supplies and as you can see from the measurements on the datasheet, even the temperature of the processor would be important to consider.

The lowest power consumption would be achieved by SNVS mode, but it requires to externally power gate the power supplies (except for SNVS) to achieve a low power consumption. There is information on this specific mode in AN13104, as it’s not covered in the previous AN I mentioned.

https://www.nxp.com/docs/en/application-note/AN13104.pdf

I hope that this information helps!

Regards,
Gustavo