Title :
Monolithic DC-DC boost converter with current-mode hysteretic control
Author :
Hasan, Aftab ; Gregori, Stefano ; Ahmed, Ishtiaq ; Chik, R.
Author_Institution :
Sch. of Eng., Univ. of Guelph, Guelph, ON, Canada
Abstract :
A monolithic DC-DC boost converter with current-mode hysteretic control is designed and simulated in 0.18-μm CMOS technology. The system is simple, robust, and has a fast response to external changes. It does not require an external clock, and the output is regulated by voltage feedback in addition to limiting the inductor current by sensing it. A non-overlapping clock is internally generated to drive the power switches using buffers designed to minimize power dissipation. For conversion specifications of 1.8 V to 3.3 V at 150 mA, overall efficiency of 94.5% is achieved. Line regulation is 17.5 mV/V, load regulation is 0.33% for a 100 mA current step, while the output voltage ripple is below 30 mV for nominal conditions.
Keywords :
CMOS integrated circuits; DC-DC power convertors; hysteresis; power semiconductor switches; switching convertors; voltage control; CMOS technology; current 150 mA; current-mode hysteretic control; external clock; inductor current; line regulation; load regulation; monolithic DC-DC boost converter; non-overlapping clock; power switches; size 0.18 mum; voltage 1.8 V to 3.3 V; voltage feedback; Clocks; Inductors; Integrated circuit modeling; Limiting; Pulse width modulation; Transient analysis; Voltage control;
Conference_Titel :
Electrical and Computer Engineering (CCECE), 2011 24th Canadian Conference on
Conference_Location :
Niagara Falls, ON
Print_ISBN :
978-1-4244-9788-1
Electronic_ISBN :
0840-7789
DOI :
10.1109/CCECE.2011.6030661
