Dear Specialists,
My customer is considering TPS6590378 and has an inquiry.
I would be grateful if you could advise.
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Is the PMIC off sequence performed when ACTIVE goes to BACKUP?
According to the datasheet Figure 5-18. State Diagram for the Power Control In the State-Machine,
there is a description to switch from the "ACTIVE" state to "BACKUP" state under the condition of "VCC <VSYS_LO".
On the other hand, 5.4.11 System Voltage Monitoring describes regarding VSYS_LO.
(When the device is in the ACTIVE, SLEEP, or OFF state and the voltage on VCC1 decreases below VSYS_LO, the device enters BACKUP mode.
When the device transitions from the ACTIVE state to the BACKUP state, all active SMPS and LDO regulators, except LDOVRTC, are disabled.
When operating with a 16.384-MHz crystal, the regulators are immediately disabled after VCC1 becomes less than VSYS_LO.
When operating without a crystal, transitioning from the ACTIVE state to the BACKUP state using VSYS_LO while the outputs are active must always be followed by a POR event to make sure the device is reset properly.)
I think as long as it uses a crystal of 16.384 MHz, it seems that the correct sequence processing will be executed without executing the POR event from the outside.
Is this correct?
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I appreciate your great help in advance.
Best regards,
Shinichi
