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TPS3110: TPS3110 Supply Voltage problem.

Terry Tseng
Expert 1075 points
Part Number: TPS3110
Other Parts Discussed in Thread: TPS3839, TPS3620

Hi TI ser :

Problem 1.  TPS3110K33DBVR NOMINAL SUPPLY VOLTAGE = 3.3V ,   I would like to know what's 3.3V range ?      for example  3.25V ~ 3.35V ?

Problem 2. If VDD is 2.0V~3.6V (battery power), dose TI have solution for battery power ?

  • 0
    TI__Genius 12630 points
    Hi Terry,

    Answer 1: If monitoring 3.3V rail, the actual trip voltage threshold is defined in the EC table 7.5 and the typical trip voltage when supply is falling is 2.941V typical (2.919V minimum, 2.963V maximum). Notice that the trip voltage is slightly under the nominal 3.3V rail so that when the rail falls to 2.941V, this indicates a under voltage fault condition. 3.3V is the normal good condition.

    Answer 2: Yes, we have devices that operate down to lower voltages and use nano-current for battery applications. TPS3839 is an example of low current device. We also have devices that allow you to attach a battery so if the power fails, the device switches over to battery power to keep device powered and working. These devices are called battery backup voltage supervisors. TPS3620 is an example with "Vbat" is the pin that connects to the backup battery.

    Please let me know if you have any more questions. Thank you!

    -Michael
  • 0 in reply to Michael_DeSando
    Expert 1075 points

    Hi Sir

    I need the typical application of TPS3110K33.

    What's VDD ?      even 2V  is OK ?

  • 0 in reply to Terry Tseng
    TI__Genius 12630 points
    VDD is any voltage between 0.9V and 3.6V.

    Please let me know if this answers your questions. Thanks!

    -Michael