Title :
A fast-transient DVS-capable switching converter with ΔIL-emulated hysteretic control
Author :
Chen, Hai ; Ma, Dongsheng
Author_Institution :
Integrated Syst. Design Lab. (ISDL), Univ. of Texas at Dallas, Richardson, TX, USA
Abstract :
A ΔIL-emulated hysteretic switching converter, achieving both low-ESR operation and fast load transient response, is presented. Designed with a 0.35μm CMOS process, it achieves sub-10 mV output ripple and 7.6μs/14.4μs response times to 400 mA load step-up/down changes. Reference tracking speed in DVS is less than 20μs/V, which is 9.4 times faster on down-tracking than conventional counterparts, due to a charge recycling technique. It achieves a maximum efficiency of 92.7% and a fixed frequency that is adaptively controlled at 1.7 MHz.
Keywords :
CMOS integrated circuits; electric charge; switching convertors; transient response; ΔIL-emulated hysteretic control; ΔIL-emulated hysteretic switching converter; CMOS process; charge recycling; current 400 mA; down-tracking; efficiency 92.7 percent; fast-transient DVS-capable switching converter; fixed frequency; frequency 1.7 MHz; load step-up/down change; load transient response; low-ESR operation; reference tracking speed; size 0.35 mum; voltage 10 mV; Control systems; Frequency control; Noise; Recycling; Transient analysis; Transient response; Voltage control;
Conference_Titel :
VLSI Circuits (VLSIC), 2011 Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-61284-175-5
