1V leakage on DCDC_IN

[sapirbuz]

Hi,

We are using MIMXRT1051CVL5B in our design and noticed that we have 1V  leakage on DCDC_IN/ VDDA_ADC_3P3/ NVCC_X/ VDD_High_IN until PMIC_ON_REQ EN is asserted.

* DCDC_IN/ VDDA_ADC_3P3/ NVCC_X/ VDD_High_IN are connected to the same rail +V3.3_MAIN that is enabld to 3.3V after PMIC_ON_REQ EN is asserted.

Pink= +V3.3_MAIN, Blue= 3.3_SNVS:

We removed all the related ICs on the board (beside the MCU) to be sure we didn't short the +V3.3_MAIN to another rail.

the leakage occurs only when the SNVS rail is up

Can you please help find the reason why could it happen?

[Rita_Wang]

Could you share the schematic to us?

[sapirbuz · Accepted solution]

problem has solved