The DS4303K from Analog Devices Inc./Maxim Integrated is a programmable series voltage reference Integrated Circuit, adjustable 300 mV, with 3.3 V, ±0.03%, 1 mA, in a SOT-23-5 package.
The DS4303R+T&R from Analog Devices Inc./Maxim Integrated is an adjustable series voltage reference Integrated Circuit with 0.3 V and 3.3 V, ±0.03% tolerance and 1 mA current, in a SOT-23-5 package.
The DS4303R-U+ from Analog Devices Inc./Maxim Integrated is an adjustable series voltage reference Integrated Circuit rated at 0.03%, in a SOT23-5 package.