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Switching off DM8148 PMIC

Madhura Shetty
Intellectual 810 points

Hi,

We are designing a DM8148 custom board  with TPS6591133 PMIC. I want to switch off PMIC output i.e (to switch off 8 LDO,3 switching regulator and one controller output ). Is there a pin on this PMIC to which I can a connect a switch ?

Regards

Madhura

  • 0
    TI__Genius 10885 points

    The most common method would be holding PWRON low for ~4 seconds, afterwhich the device will power off without resetting. Another method is to use PWRDN (Active high for TPS6591133), which can force the device into off mode. The regulators can also be disabled individually over i2c if further control is desired.

    For other configurations I would recommend referencing Figure 6-1 in the datasheet which defines the state machine for the device.

    The TPS6591133 User's Guide outlines the default register settings for the device, such as PWRDN polarity, and will give more information into how the specific device can be utilized.

     

    Regards,

    Rick S.