The REF2033QDDCRQ1 from Texas Instruments is an automotive, low-drift, low-power series voltage reference Integrated Circuit with fixed 1.65 V and 3.3 V outputs, ±0.05% accuracy and 20 mA, in a SOT-23-THIN package.
The REF2033AIDDCR from Texas Instruments is a series voltage reference Integrated Circuit with fixed 1.65 V and 3.3 V outputs, ±0.05% accuracy and 20 mA rating, in a SOT-23-5 (SOT-23-THIN) package.