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Original question:

LM5175: Reference design of Backup Battery and Supercapacitor Charging

LM5175: For EN/UVLO setup can i use a 750K ohm for RUV2 ?

PYTsai
Genius 11535 points
Part Number: LM5175

Hi 

For EN/UVLO setup can i use a 750K ohm for RUV2 ? 

The datasheet did not mentioned the Max allowable resistance for RUV2. 

Thanks!

PY Tsai

  • 0
    TI__Mastermind 21720 points
    Hi PYTsai,

    Theoretically the there is not a maximum resistance that can be used on the bottom UVLO resistor divider. However I don't recommend using a resistor that large due to the poor noise immunity.

    If the goal of the resistor is to set a large turn-on voltage and turn-off voltage hysteresis the it is better to place a resistor in series with the the UVLO pin to control the hysteresis.

    Please let me know if you have any questions.

    Thanks,

    Garrett