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TPS66120: Supply LDO 3.3V to Other Device

Jim CHEN
Expert 4795 points
Part Number: TPS66120

Dear Team,

From the spec, TPS66120 should be able to supply LDO 3.3V/ 30mA(maximum) to peripheral device.

But a lot of device like MCU requires more than 30mA current capabilities.

So my customer would like to know in the application what is the target device/ expected device that could be supplied by this LDO 3.3V/30mA.

Second, how another customer used LDO 3.3V/30mA for peripheral device? 

Thank you.

Jim      

  • 0
    TI__Expert 5695 points

    Hi Jim,

    The main reason for the LDO 3.3V is to provide internal power to the digital core inside TPS66120 (same for other TPS66X2X products) the pin is exposed for a decoupling capacitor.

    In dead battery mode (power is coming from VBUS) the LDO 3.3V could provide power to external devices. However since this device doesn't have digital interfaces requiring pullups (e.g. I2C) or boot code requirements (e.g. EEPROM for the PD controllers) there is need for an external device using the  LDO 3.3V.    

    Regards,

    Jose