摘要
为了得到稳定的输出电压,电荷泵电路需要通过负反馈系统进行控制。在传统的“Skip”模式电荷泵中,采用工作在线性区的MOS管做开关,通过控制振荡器来调节输出电压,但这种方式会产生较大的输出电压纹波。设计了一种采用饱和区MOS管作调节开关的电荷泵,通过控制饱和区MOS管的导通电阻来调节电荷泵的输出电压。它工作在占空比为50%的方波信号下,具有很低的输出电压纹波(37mV)。
Charge pump is often controlled by a feedback loop for a constant output voltage. In traditional charge pump with ＂Skip＂ mode which used MOSFETs working in linear region as switches, the output voltage is regulated via controlling the oscillator, but this mode will produce high output voltage tipple. A charge pump with a MOSFET regulating switch working in saturation region was presented. It switches at a pulse with a duty cycle of 50%, the output voltage is regulated via controlling the on-resistance of the regulating switch, this mode has low output voltage tipple （37mV）.
出处
《半导体技术》
CAS
CSCD
北大核心
2007年第1期29-32,共4页
Semiconductor Technology
基金
与台湾某公司合作的项目(DC/DC变换器设计)
关键词
电荷泵
调节开关
饱和区
导通电阻
低输出电压纹
charge pump
regulating switch
saturation region
on-resistance
low output voltage tipple
