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Dropping 100mV exactly

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elektrinis:
So I have this project, where I need to drop 100mV (±20mV): from 4.3V to 4.2V.
Current around 50mA, only one-way.
Max Iq= 50μA.
The drop should stay within ±20mV in wide current range, from 1μA to 50mA.
One extra problem: free space is very limited. I have space for maybe single SOT23 package...

Was thinking maybe find an opamp with BJT output with correct rail-to-rail drop, but could not find a suitable one.
Was also thinking about series voltage references and LDOs, but no luck as well.

What are my options??

JPortici:
Check out TS922

elektrinis:

--- Quote from: JPortici on March 12, 2019, 09:49:25 am ---Check out TS922

--- End quote ---
Iq = 3mA ...

JPortici:
uh! i forgot about the Iq

RES:
A difference amplifier (high current >=100mA opamp) plus a multi turn pot or adjustable voltage reference?

AD8603

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