A 14-ppm/V 1.5-ppm/°C Reference Voltage Source with a Wide Input Range of 4.5-35V
Authors:
- 20 October 2023
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 92-97
Abstract
This work presents a high-precision and wide-input-range reference voltage source based on a 180nm BCD process. The reference voltage source generates a constant voltage of 2.5V under the supply voltage ranging from 4.5V to 35V. Both a pre-regulator with current extraction, and high-order curvature compensation are proposed in this work. The current extraction circuit greatly improves the stability of output voltage, and the high-order term of V$_{\mathbf{BE}}$ in Bipolar Junction Transistor (BJT) is used for temperature compensation to achieve an output voltage with a low temperature coefficient. Simulation results show that a line regulation of 14ppm/V is achieved, and an average temperature coefficient is 1.5ppm/°C over the range of −45°C to 125°C. In addition, the Power Supply Rejection Ratio (PSRR) is 102.82dB at 10Hz.Keywords
Funding Information
- Engineering Laboratory
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