JSSC 2006第2期Power Management0.13μmCharge Pump

A Regulated Charge Pump With Small Ripple V oltage and Fast Start-Up

一种采用自动泵浦控制方案的小纹波快速启动电荷泵电路。

3.3V输入,4.5V输出,30mA负载电流,<33.8mV纹波,>70%效率

电荷泵纹波电压快速启动自动控制VCO

▸自动泵浦电流控制方案，根据输出电压调整泵浦驱动大小以减少纹波

▸自动泵浦频率控制方案，通过VCO控制泵浦周期

▸解耦输出纹波和启动时间，实现小纹波和快速启动

Abstract

A regulated charge pump circuit is realized in a 3.3-V 0.13- m CMOS technology. The charge pump exploits an automatic pumping control scheme to provide small ripple output voltage and fast start-up by decoupling output ripple and start-up time. The automatic pumping control scheme is composed of two schemes, an automatic pumping current control scheme and an automatic pumping frequency control scheme. The former automatically adjusts the size of pumping driver to reduce ripple voltage according