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LM5145: Shunt Resistor Current Sensing

Aaron Hsu
Intellectual 565 points
Part Number: LM5145

Hi All

Use LM5145 Shunt Resistor Current Sensing
Do I need CILIM? (time constant RILIM · CILIM is approximately 6 ns.)

As shown below

  • +1
    TI__Guru 61537 points

    No, it's not needed for shunt current sensing. That cap is intended to filter out any negative voltage excursions on the ILIM pin due to SW going transiently negative. There's no issue with the shunt as there is no large AC voltage on that node.

    Regards,

    Tim