Title :
A very low voltage high duty cycle step-up regulator
Author :
Hafiz, Mohiuddin ; Ansari, Tania ; Ahmed, Khondker Zakir ; Jaffrey, Syed Md ; Bari, Syed Mustafa Khelat
Author_Institution :
Bangladesh Univ. of Eng.&Technol.
Abstract :
A monolithic current mode CMOS DC-DC converter with new control topology and integrated power switches has been developed. System and circuit level implementation have been accomplished for the converter. Afterwards, this converter has been fabricated with a standard 0.5 mum pseudo-CMOS process. Besides having the remarkable features of complete discharge of the output voltage, pulse-by-pulse current limiting, pulse-skipping mode in light load operation etc. the control looppsilas stability of the converter is independent of compensating signal, unlike conventional current mode converters. The simulation and test data are in good agreement. The experiment results show that this converter can boost 0.8 V to as high as 5 V, which makes it suitable for low voltage application. The output ripple voltage is about 20 mV with a 4.7-muF capacitor.
Keywords :
CMOS analogue integrated circuits; DC-DC power convertors; capacitors; low-power electronics; voltage regulators; capacitance 4.7 muF; capacitor; control topology; integrated power switches; monolithic current mode CMOS DC-DC converter; output ripple voltage; output voltage; pulse-by-pulse current limiting; pulse-skipping mode; size 0.5 micron; very low voltage high duty cycle step-up regulator; voltage 0.8 V; voltage 5 V; Circuit stability; Circuit topology; Current limiters; DC-DC power converters; Lighting control; Low voltage; Regulators; Switching converters; Testing; Voltage control;
Conference_Titel :
Electrical and Computer Engineering, 2008. ICECE 2008. International Conference on
Conference_Location :
Dhaka
Print_ISBN :
978-1-4244-2014-8
Electronic_ISBN :
978-1-4244-2015-5
DOI :
10.1109/ICECE.2008.4769262
