Integrated low-ripple fast-transient switching power converter with dynamic current compensation and sensor-free quasi-SCB hysteretic control

Author

Yi Zhang ; Dongsheng Ma

Author_Institution

Dept. of Electr. Eng., Univ. of Texas at Dallas, Dallas, TX, USA

fYear

2013

fDate

17-21 March 2013

Firstpage

1962

Lastpage

1965

Abstract

A low-ripple, fast-transient, switching power converter is presented in this paper. It employs a dynamic current compensation (DCC) technique to enhance load or dynamic voltage scaling (DVS) tracking transient responses. A sensor-free, quasi-single-current-band (quasi-SCB) control is proposed to obviate the use of large-ESR filtering capacitor in conventional hysteretic control, leading to highly reduced output voltage ripples. The converter was designed with a TSMC 0.35μm CMOS process. Its input voltage can vary from 2.7 to 3.3V while the output can be regulated at any voltage level from 0.5 to 1.8V, at a switching frequency of 500kHz. Compared with its conventional counterpart, the converter achieves 153 times and 15 times speed improvement on load transient and DVS tracking, respectively.

Keywords

CMOS integrated circuits; capacitors; compensation; electric current control; switching convertors; transient response; DCC technique; DVS tracking transient responses; TSMC CMOS process; dynamic current compensation technique; dynamic voltage scaling tracking transient responses; frequency 500 kHz; hysteretic control; integrated low-ripple fast-transient switching power converter; large-ESR filtering capacitor; output voltage ripples; sensor-free quasiSCB hysteretic control; sensor-free quasisingle-current-band control; size 0.35 mum; voltage 0.5 V to 1.8 V;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Eighth Annual IEEE

Conference_Location

Long Beach, CA

ISSN

1048-2334

Print_ISBN

978-1-4673-4354-1

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2013.6520563

Filename

6520563