An Ultra Low Power Bandgap Operational at Supply From 0.75 V

We present an ultra low power (200 nA current consumption) reverse bandgap voltage reference operational from supply voltages down to 0.75 V. The reference is a part of microprocessor system on chip implemented in a digital 130 nm CMOS process and has a total area of 0.07 mm2. The reference accuracy is ± 2.5% (5 sigma) over a temperature range of - 20 to 85°C without trimming. With trimming ± 0.5% accuracy is achieved.