A fast transient response shunt low dropout regulator

被引：0
|
作者：
Oh, Wonseok [1 ]
Kim, Hyuntae [1 ]
Nadimpalli, Praveen [1 ]
机构：
[1] RF Micro Devices Inc, Chandler, AZ 85248 USA
来源：
IEICE ELECTRONICS EXPRESS | 2013年 / 10卷 / 03期
关键词：
LDO; series or shunt regulator; transient response; PSR; FREQUENCY COMPENSATION;
D O I：
10.1587/elex.10.20130011
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, the proposed shunt regulator is presented. Compared with a series voltage regulator, the shunt voltage regulator gives wideband power supply rejection (PSR) and fast transient response at the expense of large quiescent current. In this paper, a novel shunt regulator architecture is proposed to achieve the genuine characteristic of a shunt regulator with small quiescent current. The proposed shunt regulator transient response is 3.98 mu sec over full load current rising step and it is at least 3.5 times faster than series regulator. PSR characteristic of the proposed shunt regulator shows -22.4dB up to 200 kHz.
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页数：7
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