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Reference buffer for BGR

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Chinmaye

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Dear all,
I have designed a BGR to generate a reference voltage of -0.6V. I have to design a buffer for the same now. Any leads on how I can go about it? Can i design a 2 stage op-amp that can be used as a buffer ? In that case what is the range of VICM? Are there any other better configurations?

TIA

- - - Updated - - -

Also, the requirement is that the buffer must drive large current.
 

The buffer will contribute offset and gain errors to the
reference voltage. However it can also be a place to do
voltage trimming (presuming you can stand the current
taken by a resistor network) and let the bandgap be TC-
only trimmed.

Your input common mode voltage will be whatever input
you feed it - the negative input will be forced to the same.

Until you say quantitatively what "large" current means,
any choice is as good as another.

A reference which drives large current is more like a
fixed voltage regulator, and looking at those which are
made in similar technology (not said) would probably
be a good place to start learning.
 

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