Title :
An integrated four-phase buck converter delivering 1A/mm2 with 700ps controller delay and network-on-chip load in 45-nm SOI
Author :
Sturcken, N. ; Petracca, M. ; Warren, S. ; Carloni, L.P. ; Peterchev, A.V. ; Shepard, K.L.
Author_Institution :
Columbia Univ., New York, NY, USA
Abstract :
We present a four-phase integrated buck converter in 45nm SOI technology. The controller uses unlatched pulse-width modulation (PWM) with nonlinear gain to provide both stable small-signal dynamics and fast response (~700ps) to large input and output transients. This fast control approach reduces the required output capacitance by 5X in comparison to a controller with latched PWM at similar operating point. The converter switches at 80MHz and delivers 1A/mm2 at 83% efficiency and 0.66 conversion ratio.
Keywords :
PWM power convertors; delays; elemental semiconductors; network-on-chip; silicon; silicon-on-insulator; SOI technology; Si; controller delay; converter switch; efficiency 83 percent; fast control approach; four-phase integrated buck converter; frequency 80 MHz; input-output transient; latched PWM; network-on-chip; nonlinear gain; size 45 nm; stable small-signal dynamic; time 700 ps; unlatched PWM; unlatched pulse-width modulation; Capacitance; Current density; Delay; Pulse width modulation; Switches; Transient analysis; Voltage control;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2011 IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4577-0222-8
DOI :
10.1109/CICC.2011.6055336
