A flash window ADC for DVS-enabled digital controlled DC-DC converters

Author

Hai-Qi Li ; Sheng-Lei Wang ; Yuan Gao ; Yan Song ; Li Geng

Author_Institution

Sch. of Electron. & Inf. Eng., Xi´an Jiaotong Univ., Xianning, China

fYear

2012

fDate

Oct. 29 2012-Nov. 1 2012

Firstpage

1

Lastpage

3

Abstract

This paper presents the design and implementation of an analog-to-digital converter (ADC) aiming at digital controlled DC-DC converters for dynamic voltage scaling (DVS) applications. A flash window ADC with programmable conversion range is introduced. In order to achieve a reasonable yield with an uncorrected ADC, the offset of the comparator in the ADC is optimized. The proposed ADC is implemented in a standard 0.18 μm CMOS technology and is applied in a 1MHz DVS-enabled Buck converter. Experiment results show that the dynamic scaling voltage range of 1.2V-2.8V is obtained with a window size of 320mV. It has high robustness to the PVT variations compare to the conventional delay-line ADC.

Keywords

CMOS integrated circuits; DC-DC power convertors; analogue-digital conversion; comparators (circuits); delay lines; digital control; CMOS technology; analog-to-digital converter; buck converter; comparators; delay line ADC; digital controlled DC-DC converters; dynamic voltage scaling; flash window ADC; programmable conversion range; size 0.18 mum; voltage 1.2 V to 2.8 V; Arrays; Clocks; Latches; Preamplifiers; Resistors; Standards; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on

Conference_Location

Xi´an

Print_ISBN

978-1-4673-2474-8

Type

conf

DOI

10.1109/ICSICT.2012.6467811

Filename

6467811