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TPS562231: Power management forum

Genius 4220 points
Part Number: TPS562231

Tool/software:

Hi,

I have following 3 questions about bode plot measurement for TPS562231

1. If we tried to obtain bode plot of TPS562231, Is it correct way below?

2. DCAP3 has one pole and one zero at low frequency to improve DC accuracy, but I think they also make the phase margin lower at low frequency.
Is there any possibility that it leads instability at low frequency?

3. When measured the bode plot, sometimes we can see the result that  the phase graph at low frequency seems instable as follows.

     Is it caused by  noise?

Thanks,

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