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TUSB8020B: TUSB8020B and TUSB9261 power up sequence

Terry Wu
Expert 1680 points
Part Number: TUSB8020B
Other Parts Discussed in Thread: TUSB9261, TLV62084

Hello Sirs,

Currently we design Hub+SATA bridge ( TUSB8020B & TUSB9261 ) . We have questions about power up sequence. (Vdd1.1V and Vdd3.3V)

Due to both Vdd1.1V and Vdd3.3V we just use two DC-DC TLV62084 to supply TUSB8020B and TUSB9261's 1.1V and 3.3V.

Is there any concern about power up spec ?  Many thanks !

TUSB8020B and TUSB9261 power up sequence.pptx

  • 0
    TI__Guru* 76130 points

    Hello,

    "

    •May we power on DC-DC TLV62084 1.1V and 3.3V at the same time?
    •If yes,we just need to release GRSTz longer than 10ms after Vdd1.1 and Vdd 3.3 ready , right?   

    "

    Correct, you can power VDD11 and VDD33 at the same time when you hold GRST# low for a minimum of 3ms.

    Regards