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is a folded cascode opamp suitable for ultra low power application?

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zilch

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Greetings to everyone.

I am currently designing a folded cascode amplifier, but my concern is if it would be suitable for ultra low power application? like more or less, 50uW without sacrificing it's speed?

Here is my reference for this design. I like this paper since the hand calculations are provided but it's not complete.

https://www.ijera.com/papers/Vol4_issue3/Version 1/DV4301732734.pdf

The specs that I need are the ff:

Technology 65nm
Supply voltage 1.2V
Gain >=60dB
Slew rate >=10MV/s
Unity GBW >10MHz
Power Cons. <100uW
PSRR >60dB
Cload 1pF

I will be using this opamp for LDO.

Regards,
 

50µW is not an ultra low power for opamp.
With your specification, folded cascode consuming 40µA of current (without biasing) - input to load current ratio set to be equal 1:1, should gives You 10V/µs SR with 20MHz UGF.
 

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