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TPS566231: Cout ESR constrains

KARTHIK KRISHNA JAYACHANDRAN
Intellectual 370 points
Part Number: TPS566231

Hello,

I have a query regarding the allowed ESR values for TPS566231, In TI web bench it was mentioning the maximum allowed ESR value is 0.75 uE. 

  • +1
    TI__Genius 15337 points

    Hi Karthik,

    We don't specify the ESR max limit. If you use MLCC output cap (low ESR), then ESR won't be a problem. If you have to use electrolytic caps (large ESR) as Cout, you can send us the schematic for further review. As you know, larger ESR will cause a lower ESR zero (1/(2pi*Co*ESR)) in bode plot, loop bandwidth will increase. Need to check loop stability when using large-ESR Cout.