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TPS3808G01Q1EVM: How to reduce leakage current at SENSE pin.

Huang Ryan
Prodigy 80 points
Part Number: TPS3808G01Q1EVM

Hi,

If I use R1=1.3 MΩ and R2=100 kΩ, Vin=12V ,the capacitor change to 0.1 uF and this component is TPS3808G01QDBVR-Q1 .

It will have any side effect?  or another solution can reduce leakage current at SENSE pin?

I have to remain R1/R2=13 and VIt=5.67 V. 

  • 0
    TI__Genius 11311 points

    Hi Huang 

    1nF capacitor will slow down the Sense as the time constant will be 100k * 1n = 100us. It may delay the response by more than 2.2* time constant  . 

    There is no harm, if you are not using any decoupling capacitor as the I_sense of TPS3808G01 is very small and it will not load your source. 

    Hence you can use higher value of resistor to reduce power from VIN source but don't use capacitor in that case.  

    Regards

    Trailokya