A 70-nA 13-ppm/°C All-MOSFET Voltage Reference for Low-Power IoT Systems

Abstract

This paper presents a low-power All-MOSFET voltage reference implemented on a 0.18-μm standard CMOS technology. In order to improve the temperature coefficient (TC) of voltage reference, a TC compensation technique based on controlling bulk voltage is proposed. The proposed voltage reference achieves a TC of 13 ppm/°C from −40 °C to 125 °C while dissipating a supply current of 70 nA in normal temperature. The line regulation is 0.02%/V when the supply voltage varies from 1.3 V to 2.1 V, and the power supply rejection ratio (PSRR) at 100Hz is 74 dB due to the cascode current mirror. Moreover, the current mirror can be reconfigured easily so that the output voltage can be trimmed in this design.