NXP S32M276CHABMKHSR Deep-sleep current issue

[Ted_Qiao]

Hi NXP Technicians,

I tested the Deep-Sleep current in Deep-Sleep mode for IC-S32M276CHABMKHSR.

The input Voltage for VSUP is 12.0V, and the test is under room temperature(20degree).

The test result of Deep-Sleep current at VSUP is 96.8uA. But according to Datasheet, the current consumption should be below 66uA. (See attached Excel "information")

I also check the voltage status at the Deep-Sleep mode, only VPRE has voltage value of 6.64V, other system voltage of MCU is 0V.(See attached Excel "information")

The software setting of for Deep-Sleep mode is in the attachment.(See attached Excel "information")

The Schematic of this issue is also attached.

My question is how could I do to make the deep-sleep current to be equal or lower than the design value(<66uA) mentioned in the datasheet?

[Julián_AragónM]

hi @Ted_Qiao,

IDD current consumption values are taken from configuration described in IDD modes table:

Power consumption is really hard to estimate or guarantee for customers due to the close dependency with their HW and application, we can provide estimation with the PET or EVB, but in the end it will totally depend on their final application.

As a reference, you can consult the S32M2 Power Dissipation Tool. Keep in mind that results in that tool could have small variations.

Lastly, you can use as reference the documentation from S32K3 Low Power Management AN and demos. Chapter 10.2. provides tips for making low-power measurements on the bench.

Best regards,
Julián