The Texas Instruments REF3020 is a precision,low-power, low-dropout voltage, reference family available in a tiny 3-pin SOT-23 package. It offers excellent temperature drift and initial accuracy while operating at a quiescent current of 42 μA

micro Size Package: SOT-23-3
Low Dropout: 1 mV
High Output Current: 25 mA
High Accuracy: 0.2%
Low IQ: 42 μA (Typical)
Excellent Specified Drift Performance:
50 ppm/°C (Maximum) From 0°C to 70°C
75 ppm/°C (Maximum)From –40°C to +125°C

Voltage References, Texas Instruments

Precison Fixed and Adjustable Voltage Reference ICs utilsing series, shunt or series/shunt topologies and available in both through-hole and surface mount packages. Voltage References are available with initial accuracies of ±0.02 to ±2%.