Title :
Load Current Adaptive Control of a Monolithic CMOS DC/DC Converter for Dynamic Power Management
Author :
Su, Wei-Chi ; Tzou, Ying-Yu
Author_Institution :
Nat. Chiao Tung Univ., Chiao Tung
Abstract :
This paper presents the design of a monolithic current-mode CMOS DC/DC converter with integrated power switches and an on-chip passive adaptive controller with the sensed average inductor current. The sensed switched current, combined with the integration of inductor voltage, and a voltage-controlled floating resistor, can be used for the adaptive control of a CMOS DC/DC converter. The nonlinear carrier control can adjust carrier according to input voltage to reduce the input disturbance. The proposed control scheme has been design and simulation verified based on the TSMC 0.35 mum technology. The designed CMOS DC/DC switching regulator is based on a rated output current of 500 mA with an adjustable output voltage from 1.0V to 1.8V. Simulation results shows the proposed adaptive control scheme can achieve a fast dynamic power on transient response as well as a robust voltage regulation against large loading current variation.
Keywords :
CMOS integrated circuits; DC-DC power convertors; adaptive control; current-mode circuits; nonlinear control systems; power integrated circuits; switching convertors; transient response; voltage control; TSMC 0.35 mum technology; current 500 mA; dynamic power management; integrated power switches; load current adaptive control; monolithic current-mode CMOS DC-DC converter; nonlinear carrier control; on-chip passive adaptive controller; sensed average inductor current; sensed switched current; size 0.35 mum; transient response; voltage 1.0 V to 1.8 V; voltage regulation; voltage-controlled floating resistor; Adaptive control; CMOS technology; DC-DC power converters; Energy management; Inductors; Programmable control; Regulators; Resistors; Transient response; Voltage control; CMOS DC/DC converters; dynamic power management; fast dynamic response; load current adaptive control; nonlinear carrier; synchronous buck regulator;
Conference_Titel :
Power Electronics Specialists Conference, 2007. PESC 2007. IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-0654-8
Electronic_ISBN :
0275-9306
DOI :
10.1109/PESC.2007.4342015