S32K376NHT1MJBST: applicable power estimator and per-supply current data Hello, Could you please identify the applicable power-estimation tool and supply-current data for S32K376NHT1MJBST? Does S32K-PET support this exact derivative? Which tool and device-dataset revisions should be used? If it is not supported, what is the recommended current NXP method? For externally supplied V15 with the external NMOS V11 regulator arrangement, how should reported demand be attributed to V15, V11, VDD_HV_A/B and other analog/bias supplies? Please identify what is included or excluded, especially regulator losses, shared core/lockstep demand, I/O loading and peripheral currents, so these are not counted twice. Which applicable public documents, data or characterization method cover worst-case supply current versus voltage/temperature, and peaks during reset, startup, wake and clock/mode changes? Please distinguish typical/average estimates from guaranteed limits and identify their conditions. The public PET page and setup guide have been reviewed. Their family-level support listing and initial average-power scope do not identify the exact derivative or all physical-supply contributions. We are seeking the applicable sources and method, not an application-specific current result without a defined operating profile. Please point to the appropriate public material or support route if these details are not public. Thank you. Re: S32K376NHT1MJBST: applicable power estimator and per-supply current data Hello @JonasGranlund,
1. As of now, the S32K PET tool does not support S32K39/37/36 devices. The recommended method is to refer to S32K396's Data Sheet (Rev. 5) for supply current data, specifically:
6.7 Supply currents (Standby and RUN mode tables)
6.9 Cyclic wake-up average current calculation
2. The datasheet supply current tables report current at the following rails independently:
VDD_HV_A is catalogued as the main I/O and analog supply, and it covers both I/O pads in the VDD_HV_A bank and all analog blocks.
VDD_HV_B is the secondary I/O supply and covers I/O pads in the VDD_HV_B bank only. You can refer to "S32K39_and_S32K37_IOMUX.xlsx" attachment inside the Reference Manual in order to identify which pin belongs to which power domain.
V11 is generated by V15 using external NMOS. The external V1.5 power supply should be turned off before entering LPM mode.
IO load current is not included in measurements. The actual current requirements for IOs will depend on the I/O configuration in the application. Refer to the DC characteristics tables in the S32K39 Data sheet.
Lockstep/dual-core demand is included in the core supply figures in the data sheet; the power consumption is specified to be the same because there are no separate specifications depending on the load of the cores.
3. Data Sheet values include ambient temperature, typical and maximum values.
As far as I know, there are no specific S32K39 documents detailing worst-case scenario currents, peaks during reset, etc. However, S32K3 Low Power Management AN and demos document provide power mode transitions, clock operation in low-power modes, hardware considerations and quiescent current. It is focused on a more family-level, referencing S32K3xx in general, rather than S32K39-37-36 specifics.
I've also sent you a private message in community sharing S32K3 Low Power Lab presentation, which explains S32K3 low power behavior and considerations.
Best regards, Julián
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