How to reduce phase margin in a folded cascode OTA?

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WINNIEMATHEWS

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Hi,
I have to design a Folded cascode OTA with gain>50 dB, Unity gain frequency 25MHz, Phase Margin of 60 degrees , PSRR>55dB and CMRR> 55dB for a 5 pF capacitive load.

I am able to satisfy all the conditions except the Phase Margin of 60 degrees. I am getting a phase margin of 70.
How can I bring it down to 60 without affecting my Unity gain frequency?
Please help..
 

Folded Cascode

If you have 70 degrees of phase margin, you do not need to do anything. The specified phase margin is usually a minimum value.
 
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