Two-temperature trimming for a voltage reference with reduced quiescent current

In an example method of trimming a voltage reference circuit, the method includes: setting the circuit to a first temperature; trimming a first resistor (RDEGEN) of a differential amplifier stage of the circuit; and trimming a first resistor (R1) of a scaling amplifier stage of the circuit. The trimming equalizes current flow through the differential amplifier stage and the scaling amplifier stage. The method includes: trimming a second resistor (R2) of the scaling amplifier stage to set an output voltage of the circuit to a target voltage at the first temperature; setting the circuit to a second temperature; and trimming a second resistor (RPTAT) of the differential amplifier stage, a third resistor (R1PTAT) of the scaling amplifier stage, and a fourth resistor (R2PTAT) of the scaling amplifier stage to set the output voltage of the circuit to the target voltage at the second temperature.