MWCD2D16S VDD/V15 power up/down timing

[Devin51]

Hi NXP experts,

In our`s design,we use 1.5V from DCDC  as supply for VDD,and use a 3V3 LDO  as VDD supply.

What`s the requirements of MWCD2D16S VDD and V15 power up/down timing？

I can`t find the requirements of these in DS or RM,except vramp requirements:

both vdd and v15 need rise up within 100V/ms~0.5V/min?

[Robin_Shen · Accepted solution]

Hi

I can't find the MWCD2D16S, and I'm not sure if the MWCD2D16S you're referring to is the MWCT2D16S.

In the S32K3 MCUs, there is not a power up/down sequence but the customer must respect the power-on ramp rate and the VREFH should always be equal to or less than VDD_HV_A +0.1.

Section 2.10.1 MCU Power Supply Ramp Rate in S32K3xx - Hardware Design Guidelines -- Rev_E2.pdf mentions the ramp rate of VDD_HV_A, VDD_HV_B and V15:

Best Regards,
Robin
-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "ACCEPT AS SOLUTION" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------