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TPS7A94: low power management

Part Number: TPS7A94

Dear TI support, 

I need a voltage regulator that can output 0.35V. I found the part TPS7A94 selecting from the website of TI. However the data sheet says that it can offer output voltage in the range 0.4V-5.0V. I am wondering if I can use it. Do you have another regulator and converter whcih can do it? It will be great to receive suggestions. 

Thanks in advance

Olonbayar

 

 

  • Hi Olonbayar,

    The TPS7A94 can do this.  You set the voltage through 1 resistor on the NR/SS pin.  Inside the TPS7A94 there is a current source of 150 uA which flows into the NR/SS pin resistor.  This voltage (150uA * NR/SS resistance) sets Vout.  If you need 0.35V then the resistor you would select would be as close as you can get to 2.333 k-ohms.

    In theory, you could even set Vout = 0V by grounding the NR/SS pin.

    From the TPS7A94 datasheet:

    Thanks,

    Stephen

  • Hi Stephen, 

    Thanks for your support. Great. I have an another shaort question. To get 0.35V output should I set the resistor R6 to 2.333kOhm and the rest of the circuit stays the same? I am refering to the data evaluation board for this component. 

    Thanks 

    Olonbayar 

  • Hi Olonbayar,

    You can modify the rest of the circuit as you need.  If the example in the evaluation circuit meets your design needs, then you can keep it the same.  This will make it easy for you to evaluate your design as the eval board can be purchased for rapid testing.

    Keep in mind that the LDO does not require the test points, or test connector, from the evaluation module.  Those are only there to help you make your evaluation of the device.  The board level shield is there to help minimize noise in a high noise environment when customers evaluate the device on the EVM.  You do not need to include this in your design unless you felt it was helpful for your system.

    Thanks,

    Stephen