AN INTEGRATED DC-DC STEP-DOWN CONVERTER WITH A LOAD REGULATION ENHANCEMENT (LRE) MECHANISM AND A PROPORTIONAL COMPENSATED DIFFERENTIAL-IN-DIFFERENTIAL-OUT (DIDO) ERROR AMPLIFIER

摘要

A differential-in differential-out (DIDO) error amplifier and a load regulation enhancement (LRE) mechanism are proposed in the buck converter that aims to improve load regulation and internal noise immunity. No external compensation components are needed in this design. As a result, a compact size and high performance DC-DC buck converter can be guaranteed. Experimental results show load regulation can be improved from 0.5mV/mA to 0.025mV/mA, which is equal to an improvement of about 20 times, through the test chip fabricated by 0.25μm CMOS process.