MWCD2D16S VDD/V15 power up/down timing

Devin51 — Wed, 17 Sep 2025 00:48:53 GMT

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?

Re: MWCD2D16S VDD/V15 power up/down timing

Robin_Shen — Wed, 17 Sep 2025 04:50:33 GMT

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
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topic MWCD2D16S VDD/V15 power up/down timing in S32K

MWCD2D16S VDD/V15 power up/down timing

Re: MWCD2D16S VDD/V15 power up/down timing