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TPS51200-Q1: Can VLODIN be powered up before VIN?

David Jedynak
Prodigy 30 points
Part Number: TPS51200-Q1

on page 12 and 13 of the datasheet for TPS51200-Q1 it shows a diagram of the typical power up. https://www.ti.com/lit/ds/symlink/tps51200-q1.pdf?ts=1691074369828&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS51200-Q1%252Fpart-details%252FTPS51200QDRCRQ1

Is it required to always power Vin (3.3VDC) before VLODIN?(1.2V in this case), or can VLODIN be powered up before Vin? 

Thanks

  • 0
    TI__Genius 10772 points

    Hi David,

    Thanks for the inquiry. Yes, you can power VLDOIN/REFIN before VIN/EN. However please note that when the device has this for a power sequence, you will experience some overshoot on the output but should operate normally thereafter. 

    Thanks,
    Field