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TPS40428: powerup sequencing

Part Number: TPS40428
Other Parts Discussed in Thread: CSD95378BQ5M

if i am using a single 5V supply for a multi phase design can i trust the controller and power stage to power up and down together or do i need to delay the the controller to make sure the power stage turns on first?

  • Hello, please check the UVLO table

    The power stage may not have a UVLO but it recommends minimum supply voltage i.e CSD95378BQ5M. The controller turns on/off when VDD reaches the UVLO and this turns on/off the power stage as well. It is recommended to use small RC filter between the power stage supply and VDD.

    Regards