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TPS65708: TPS65708

Sam Sangani
Prodigy 160 points
Part Number: TPS65708

Dear,

What would be power sequence if both LDOs are powered from DCDC1? please find my schematic attached.

Regards,

Sam

  • 0
    TI__Expert 8730 points

    Hi,

    Are you referring to section 8.3.9 Power-up Sequencing section in the datasheet page-14?

    If so, this device is set to option-2. i,e DCDC1 starts first and once its power good LDO1 starts. Once LDO1 is up and running DCDC2 is enabled. Once DCDC2 power good is released LDO2 is released.

    I have forwarded your request to product expert and he will get back to you if this is not correct or if you have any additional questions on this topic.

    Regards,

    Murthy

  • 0 in reply to Krishnamurthy Hegde
    TI__Genius 10885 points

    Hi Sam,

    Murthy is correct, the sequence will be 3.3V -> 2.8V -> 1.8V -> 1.2V. 

    LDO2 is not enabled until DCDC2 indicates power-good, regardless of the source for VINLDO2.

    Best Regards,

    Rick S.