An External-Capacitorless High-PSR Linear Voltage Regulator With Source-Follower-Based Pre-Filter

Conference on Ph.D. Research in Microelectronics and Electronics, pp. 341–344

Abstract

This paper presents an external-capacitorless linear voltage regulator for supply noise decoupling of a sensitive clock synthesizer circuit in a gate driver IC. The design generates a precise and low-noise 1.8V output voltage from the noisy 5V supply rail of the system. The regulator architecture is based on a source follower pre-filter in combination with an NMOS pass-transistor. A worst-case PSR of 43dB is achieved across the whole load current range of up to 5mA. The total quiescent current is $20 \mu A$ and the occupied area, including the 8pF on-chip output capacitance, is only 0.012mm2. The circuit is implemented in a $0.18 \mu m$ BCD technology.

Authors 5

1. Erik Wehr Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University Kopernikusstraße 16,Integrated Analog Circuits and RF Systems,Aachen,Germany,D-52074

2. Tobias Zekorn Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University Kopernikusstraße 16,Integrated Analog Circuits and RF Systems,Aachen,Germany,D-52074

3. Kenny Vohl Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University Kopernikusstraße 16,Integrated Analog Circuits and RF Systems,Aachen,Germany,D-52074

4. Ralf Wunderlich Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University Kopernikusstraße 16,Integrated Analog Circuits and RF Systems,Aachen,Germany,D-52074

5. Stefan J. Heinen Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University Kopernikusstraße 16,Integrated Analog Circuits and RF Systems,Aachen,Germany,D-52074