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DC-DC Switched-Mode Power Supply System

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bharath_k

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Hello All,

I designed a system to convert from 1.8V to 3.3V. I have the schematic diagram as shown below.

sche_reg_chargepump.PNG

I am running corner analysis and it passes all the corners except in SS_pre as shown below. I get ripples. When I see the switching of the comparator is slow. From what I can see either it is slow from the voltage divider to the input of comparator or the comparator itself is slow. Can anyone suggest how can I find the which of the two is causing me the problem?

outp.PNG

Thanks in advance!

Regards,
Bharath
 

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