Title :
A digitally controlled DC-DC buck converter with bang-bang control
Author :
Heejun Kim ; Jungmoon Kim ; Minseob Shim ; Junwon Jung ; Sejin Park ; Chulwoo Kim
Author_Institution :
Korea Univ., Seoul, South Korea
Abstract :
This paper proposes a digitally controlled DC-DC buck converter with bang-bang control in 0.18μm BCDMOS technology. It has advantages of digital circuit and hysteresis control. The converter includes a 6-bit SAR ADC, 6-bit DPWM, analog dead-time & driver circuits, and proposed bang-bang control block. The converter occupies an area of 2.35mm2, and it operates with a fixed switching frequency of 1MHz. The input voltage ranges from 1.8V to 4V. The output voltage is 1.2V. The power efficiency of 77.4% is achieved at the output current of 199mA. The output ripple voltage is 1.6mV.
Keywords :
CMOS integrated circuits; DC-DC power convertors; bang-bang control; control engineering computing; digital control; driver circuits; electronic engineering computing; 0.18μm BCDMOS technology; 6-bit DPWM; 6-bit SAR ADC; analog dead-time circuits; analog driver circuits; bang-bang control; current 199 mA; digital circuit; digitally controlled DC-DC buck converter; fixed switching frequency; frequency 1 MHz; hysteresis control; output ripple voltage; power efficiency; voltage 1.2 V; voltage 1.6 mV; voltage 1.8 V to 4 V; Bang-bang control; Conferences; DC-DC power converters; Digital circuits; Digital control; Educational institutions; Inductors; Bang-bang control; buck converter; digital DC-DC converter;
Conference_Titel :
Electronics, Information and Communications (ICEIC), 2014 International Conference on
Conference_Location :
Kota Kinabalu
DOI :
10.1109/ELINFOCOM.2014.6914373
