Publication detail

A CMOS Follower-Type Voltage Regulator With a Distributed-Element Fractional-Order Control

KADLČÍK, L. HORSKÝ, P.

Original Title

A CMOS Follower-Type Voltage Regulator With a Distributed-Element Fractional-Order Control

Type

journal article in Scopus

Language

English

Original Abstract

This paper presents an application of a fractional-order control in an on-chip follower-type 1.8 V/100 mA voltage regulator to achieve a good stability with any load capacitance. The controller approximates an integrator with the fractional order of 0.5, whose phase lag is not more than 45°. The fractional order is set by the fractional-order impedance of the resistive p-type MOS capacitor (R-PMOScap). With an n-type MOS source follower stage adding the phase lag of at most 90°, the remaining phase margin is always at least 45°. The R-PMOScap is a novel integrated distributed-element RC network, realized as a resistive polysilicon strip on a gate oxide, and is compatible with an analog CMOS process. The voltage regulator has been manufactured in a 350-nm CMOS process and occupies a small chip area of 0.038 mm^2. It operates in a harsh automotive environment with a temperature from -50 °C to 200 °C and shows a tight DC regulation, while being stable over the full range of the load current (from 0 to 100 mA) and with any load capacitance (allowing to use none or any external capacitor).

Keywords

distributed-element RC circuit; fractional-order control; fractional-order integrator; loop stability; R-PMOScap; source follower; voltage regulator

Authors

KADLČÍK, L.; HORSKÝ, P.

Released

9. 3. 2018

Publisher

IEEE Circuits and Systems Society

Location

Spojené státy americké

ISBN

1549-8328

Periodical

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS

Year of study

65

Number

9

State

United States of America

Pages from

2753

Pages to

2763

Pages count

11

URL

http://ieeexplore.ieee.org/document/8310958

BibTex

@article{BUT146820,
  author="Libor {Kadlčík} and Pavel {Horský}",
  title="A CMOS Follower-Type Voltage Regulator With a Distributed-Element Fractional-Order Control",
  journal="IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS",
  year="2018",
  volume="65",
  number="9",
  pages="2753--2763",
  doi="10.1109/TCSI.2018.2808879",
  issn="1549-8328",
  url="http://ieeexplore.ieee.org/document/8310958"
}