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TPS53679: Power sequencer 5V can power up after 12V or not ?

Peiwei Zhao
Prodigy 20 points
Part Number: TPS53679

Tool/software:

Hi TI master

       

      TPS53679  datssheet Figure 7-1  has defined the power on sequencer:  it is 5V is power up before 12V.

       But reference design schematics  PMP20489 参考设计 | 德州仪器 TI.com.cn: CSD95490+TPS53679,  we must get Vin 12V ,and then can get 5V from VRM output, so the power seqencer is  5V power up after 12V.

       Now，we are confused and worried that if it can get CSD95490 at risk or not ,  
       Question is : if we use reference design , 5V can power up after 12V or not ?

       Thanks!

 

      

         


 

  • 0
    TI__Intellectual 1150 points

    Hi Peiwei:

    Please make sure the CSD95410 is enable firstly before VR controller, That means: if 12V is produced already, please make sure the VR controller is not enable quickly, so just enable controller right after csd95410 EN is already established, thanks!