Title :
Proportional Compensated Buck Converter With a Differential-In Differential-Out (DIDO) Error Amplifier and Load Regulation Enhancement (LRE) Mechanism
Author :
Lee, Yu-Huei ; Chu, Kuan-Yu ; Shih, Chun-Jen ; Chen, Ke-Horng
Author_Institution :
Inst. of Electr. Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
5/1/2012 12:00:00 AM
Abstract :
A differential-in differential-out error amplifier and a load regulation enhancement mechanism are proposed in the buck converter that aims to improve load regulation and noise immunity. By using the proportional compensator in the proposed converter, there is no need of external compensation components in this design. As a result, a compact-size and high-performance dc-dc buck converter can be guaranteed. Experimental results show that load regulation can be improved from 0.5 to 0.025 mV/mA. The test chip was fabricated by 0.25 μm CMOS process and occupied 1.65 mm active silicon area.
Keywords :
CMOS analogue integrated circuits; DC-DC power convertors; differential amplifiers; CMOS process; DIDO error amplifier; LRE mechanism; active silicon area; differential-in differential-out error amplifier; high-performance DC-DC buck converter; load regulation enhancement mechanism; noise immunity; proportional compensated buck converter; proportional compensator; size 0.25 mum; size 1.65 mm; Capacitors; Noise; Resistors; Sensors; System-on-a-chip; Transient response; Voltage control; Current-mode operation; dc–dc converter; differential-in differential-out (DIDO) amplifier; load regulation; system compensation;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2011.2173701
