A 65-nm, 1-A buck converter with multi-function SAR-ADC-based CCM/PSK digital control loop

Author

Cliquennois, S. ; Donida, A. ; Malcovati, P. ; Baschirotto, A. ; Nagari, A.

Author_Institution

ST-Ericsson, Grenoble, France

fYear

2011

fDate

12-16 Sept. 2011

Firstpage

427

Lastpage

430

Abstract

A 1-A DC-DC converter with embedded digital controller is implemented in 65-nm CMOS technology. The digital controller based on a customized, multi-function SAR ADC, occupies 0.038 mm² and consumes 115.5 μA from a 1.2-V supply, making the DC-DC converter suitable for portable applications. The DC-DC converter implements Continuous-Conduction Mode (CCM) control for high-current loads, a Pulse-Skipping (PSK) feature, in order to keep high efficiency at light loads, and automated switching between these two modes, in order to guarantee the best possible transient performance and efficiency.

Keywords

CMOS integrated circuits; DC-DC power convertors; digital control; electric current control; embedded systems; phase shift keying; transient analysis; CMOS technology; DC-DC converter; automated switching; buck converter; continuous-conduction mode control; current 1 A; embedded digital controller; high-current load; multi-function SAR ADC; multifunction SAR-ADC-based CCM-PSK digital control loop; pulse skipping feature; size 65 nm; transient performance; CMOS integrated circuits; Clocks; Phase shift keying; Power demand; Switched-mode power supply; Transient analysis; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

ESSCIRC (ESSCIRC), 2011 Proceedings of the

Conference_Location

Helsinki

ISSN

1930-8833

Print_ISBN

978-1-4577-0703-2

Electronic_ISBN

1930-8833

Type

conf

DOI

10.1109/ESSCIRC.2011.6044998

Filename

6044998