A 0.6V-supply bandgap reference in 65 nm CMOS

A bandgap voltage reference that operates from a power supply of 0.6 V is presented in this paper. The circuit is based on an all-CMOS implementation that allows operation below the base-emitter voltage limit by eliminating parasitic vertical bipolar-junction-transistors. Low-voltage design techniques are deployed to design an op-amp that can obviate the need for a start-up circuit. The design was implemented in 65 nm CMOS technology. The measured reference voltage is 275 mV with an average temperature coefficient of 176 ppm/°C from -50°C to 80°C without trimming. The circuit consumes 62 μW of power and occupies 0.011 mm² of chip area.