VDD_HV_A Power Consumption Change in S32K3X8 Standby Mode

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VDD_HV_A Power Consumption Change in S32K3X8 Standby Mode

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NewbieNerd
Contributor III

Hello, S32K3 Team,

I have some questions regarding VDD_HV_A in S32K358.

While using the S32K358 in RUN mode, the current consumption from VDD_HV_A measures around 26mA.
When using Mcu_SetMode to change the mode from RUN -> SOC_Prepare_Standby -> SOC_Standby, the power consumption decreases to 4mA.
However, about 20 seconds after the MCU enters Standby mode, the FS26 transitions from Normal to Standby mode, and at that point, the VDD_HV_A current consumption returns to 26mA. In this situation, the power consumption remains stable, similar to the RUN mode, without any noticeable fluctuations. Additionally, when using the wakeup function, the MCU correctly returns to Run mode, and the Reset Reason is accurately recorded as 28. (We are currently using PGOOD Handshake bypass.)

In the case of VDD_HV_B, the power consumption decreases when entering Standby mode.

I would appreciate your insights on the following:

  1. What could be the cause of the power consumption initially dropping to 4mA in Standby mode, then returning to 26mA?
  2. What methods or approaches would you recommend to resolve this issue?

Best Regard,

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NewbieNerd
Contributor III
 

Hello,

As you mentioned, I changed the clock before entering MCU Standby mode. In Standby mode, I disabled the clock for all peripherals.

Please refer to the image below.

mcu_1.pngmcu_2.pngmcu_3.pngmcu_4.pngmcu_5.pngmcu_9.pngmcu_10.pngcode_1.png

Best regards,

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Julián_AragónM
NXP TechSupport
NXP TechSupport

Hi @NewbieNerd,

Is it possible to share your configuration? Which peripherals or clocks are enabled for standby mode? Are you switching to FIRC as the system clock before standby? 

I have also sent you a private message in community.

Best regards,
Julián

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