TIDUF05 August 2022
To verify the power supply sequencing and start-up behavior, each voltage rail output from the TPS650320-Q1 device is measured after applying power over coax to the system.
In this design, the PDB reset signal of the DS90UB953-Q1 device is connected directly to the nRSTOUT pin of the TPS650330-Q1 device. With the integrated sequencing capabilities of the PMIC, this ensures that the PDB reset line goes high after the 1.8-V supply is stable, eliminating the need for an external RC network.