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TPS65219: External Power switch feature to be included inside the PMIC itself for future variants of the PMIC

Premalatha Royappan
Intellectual 910 points
Part Number: TPS65219


Hi

We are using TPS6521908 in our design to power the processor AM625x. As per the implementation using TPS6521908(refer image below), we are required to use an external Power switch for 3.3V. Can this functionality be implemented inside the PMIC itself for future variants of the PMIC? Kindly let us know.

  • 0
    TI__Genius 13870 points

    Hi Premalatha, 

    Due to the Thanksgiving holiday in the U.S. our TPS65219x-Q1 experts are out of office this week. Please expect a delayed response by early next week. Thank you in advance for your patience.

    Best Regards,

    Jari

  • 0 in reply to Jari Niemela13
    TI__Mastermind 22761 points

    Hi,

    Thank you for your patience! For applications using 3.3V input supply, we recommend using an external power switch, specially when total current consumption (processor + peripherals) on the 3.3V IO domain is equal or higher than 300mA or 400mA. The reason for this is because LDO1/2/3/4 could be configured as load switch but they have a max current of 300mA for LDO3/4 and 400mA for LDO1/2.

    We currently don't have a TPS65219 variant defined with LDO configured as load switch to support the 3.3V IO domain on the AM62. However, we plan to release the TPS6521905 which is a user-programmable (DIY) version that will come with all the rails OFF by default to provide customers the flexibility of programming the NVM memory and configure the PMIC to meet specific power/system requirements.   

    Thanks,

    Brenda