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Which type of comparator can use in the buck converter?

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lj053

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Which type of comparator can use in the buck converter?
the switch frequency is 500k~1MHz.
Thanks.
 

you can go for a two-stage class a ouput opamp in open loop.
 

I prefer to use Hysteresis comparator using two series classical open loop opamp with a lacth output
 

To smartdream:
Can you show me its schmetic or some docs?
thanks.
 

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