← 返回 JSSC 论文列表JSSC 2012第4期Data Converters0.13μmDelta-Sigma ADCBuck Converter
A Spurious-Free Switching Buck Converter Achieving Enhanced Light-Load Ef ficienc
提出一种无杂散开关降压转换器，通过多种技术提升轻载效率。
0.13μm CMOS, 噪声基底<-60dBm, 纹波<70mV, 效率>70%(峰值95.1%), 负载范围2mA-800mA
降压转换器轻载效率Δ-Σ调制无杂散电流传感
▸采用Δ-Σ调制器控制器降低输出噪声
▸根据负载电流动态调整开关频率
▸轻载时切换至断续导通模式(DCM)
Abstract
This paper presents a spurious-free switching buck
converter with enhanced light-load ef ficiency for use in noise-sen-
sitive portable electronics. The proposed sw itching buck converter
achieves low output noise by using a delta-sigma-modulator
controller. Its light-load ef ficiency is enhanced by: 1) scaling the
switching frequency of the buck converter ( i.e., the sampling
frequency of its -modulator controller) with the load current;
2) switching its operation from continuous conduction mode