Which type of comparator can use in the buck converter?

[lj053]

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

 

[mirja]

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

 

[smartdream]

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

 

[lj053]

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

 

[johnsmith101]

You can use a two-stage hysteresis comparator like that shown on page 475 of the Allen and Holberg CMOS book (2ed).