Title :
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
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;
Conference_Titel :
ESSCIRC (ESSCIRC), 2011 Proceedings of the
Conference_Location :
Helsinki
Print_ISBN :
978-1-4577-0703-2
Electronic_ISBN :
1930-8833
DOI :
10.1109/ESSCIRC.2011.6044998
