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TPS65217: Down sequecing

Kuramochi Tadahiko
Guru 28715 points
Part Number: TPS65217

Hi,

I'm understanding that  power-down sequencing follows the reverse power-up sequence by default.

Following waveform sequences are abnormal, aren't they?

The INSTDWN bit is always 0.

Best Regards,

Kuramochi

  • 0
    TI__Genius 10885 points
    Kuramochi-san,

    In OFF mode the battery voltage supplies the SYS pin, shown in the Global State Diagram of the datasheet (Figure 20) as Note (4).

    If this is a battery-less system, the regulators could be losing their input supply too quickly for the reverse shutdown sequence.

    Best Regards,
    Rick S.