STM32L452 current consumption in STOP 2 mode is less than datasheet indications.

[Jsine.1]

When I run the PWR_STOP2 example from the STM32Cube_FW_L4_V1.15.0 on a STM32L452VE, I measure a current consumption egal to 1.6 uA instead of 2.05 uA.

The datasheet and STM32CubeMX indicate 2.05 uA without RTC for this target.

It's a great news 8) but I'm afraid that it hides something wrong.

For information, when I run this same example for and on a STM32L476, the current measured is in accordance to the datasheet indications.

Can you help to understand this good news? ;)

In advance, thank you.

[Uwe Bonnes]

Datasheet value may differ from the typical values but not be more tha the max value, if given.

You ambient temperature may also differ, having also great influence.

[Jsine.1]

Thank you.

My ambient temperature is about 25°C.

With STM32CubeMX, the current consumption simulation doesn't allow to have a consumption less than 2.05 uA in STOP 2 mode.

Often, the values indicate are the best that we hope to observe. Is it right?

[Uwe Bonnes]

Typical values are typical. About 50 % of parts will be above and 50 % below that value.

[Jsine.1]

Even for a low power consumption?

[Uwe Bonnes]

Yes. That is what typical values are for.