Design of a Flexible Bandgap Based High Voltage UVLO with Pre-Regulator

Abstract

This paper presents an integrated 24 V undervoltage-lockout (UVLO) design based on a ±0.78 % accuracy 77 dB supply rejection bandgap reference and utilizing a dedicated pre-regulator. The design features a high number of inputs with minimum additional space. The switching thresholds have a nominal accuracy over temperature of 1.1 %. The power consumption at 10 V is 119μW and the circuit occupies a die area of 0.15 mm2. This circuit is implemented in a 0.18 μm BCD technology.

Authors 7

1. Jan Grobe Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany

2. Michael Hanhart Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany

3. Fabian Maul Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany

4. Léon Weihs Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany

5. Leo Rolff Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany

6. Ralf Wunderlich Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany

7. Stefan J. Heinen Aachen Chair of Integrated Analog Circuits and RF Systems

   RWTH Aachen University

   Affiliation as printed

   Chair of Integrated Analog Circuits and RF Systems, RWTH Aachen University, Aachen, Germany