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LM5576: About LM5576 Vin and Vout capacitor

Jerry Yang48
Intellectual 640 points
Part Number: LM5576

Hi :

     Vin=12V---36V, Vout=5V, I have two questions to ask:

  1:Withstand voltage value of capacitors C1, C2, C3, C4,C5,C7,C11 given in schematic diagram is 100V, if i use

     50 V capacitor ,is OK?

   2:Is there any clear requirement for capacitor material, X7R, X5R or cog? In particular, I used to use X7R material for C11, is it feasible to change cog?

  • 0
    TI__Mastermind 23845 points

    Hi Jerry,

    1) Yes 50V capacitor should be ok. The important capacitor is C1 and C2 since it is the input capacitor that is exposed to up to 36V input voltage (Assuming no overshoot).

    2) X7R is a good general guideline. As for C11, yes you can change it to COG but i think X7R should be good enough since it is a snubber capacitor with R7

    Thanks

    -Arief