Title :
High efficiency DC-DC buck converter with 60/120-MHz switching frequency and 1-A output current
Author :
Belloni, Massimiliano ; Bonizzoni, Edoardo ; Maloberti, Franco
Author_Institution :
Dept. of Electron., Univ. of Pavia, Pavia, Italy
Abstract :
This DC-DC buck converter is able to operate up to 120-MHz switching frequency with peak power efficiency of 87% for 75% duty cycle and 93% at 60 MHz. Key feature of this design is a new control method that replaces the conventional op-amp based scheme. The proposed circuit uses a current-mode control and a voltage-to-pulse converter for the PWM. The circuit, fabricated using a 0.18-mum CMOS technology, reaches a peak load regulation of 20 mV/V and line regulation of 0.5 mV/V at 300 mA. The used 36-nH inductance and 4.7-muF capacitor are suitable for SiP realizations.
Keywords :
CMOS integrated circuits; DC-DC power convertors; PWM power convertors; operational amplifiers; switching convertors; system-in-package; CMOS technology; DC-DC buck converter; PWM; SiP; capacitance 4.7 muF; control method; current 1 A; current 300 mA; current-mode control; frequency 120 MHz; frequency 60 MHz; op-amp based scheme; size 0.18 mum; switching frequency; voltage-to-pulse converter; Buck converters; CMOS technology; Capacitors; Circuits; Inductance; Operational amplifiers; Pulse width modulation; Pulse width modulation converters; Switching frequency; Voltage control;
Conference_Titel :
ESSCIRC, 2009. ESSCIRC '09. Proceedings of
Conference_Location :
Athens
Print_ISBN :
978-1-4244-4354-3
DOI :
10.1109/ESSCIRC.2009.5325999
