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TPS5450: TPS5450 Internal compensation network

Part Number: TPS5450

Hi Team,

I see the compensation network of TPS5450 (Figure 1, it has internal Z1 & Z2) differs from the common compensation network we see usually (Figure 2, external RC on the top fb resistor). could you tell me the parameter of Z1 & Z2? I have this question because the calculation result using equation in Figure 3 doesn't align with that in EVM or WEBENCH and I would like to verify. thanks.

best regards,