| 利用动态密勒补偿电路解决LDO的稳定性问题 |
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| 引用本文： | 来新泉,解建章,杜鹏程,孙作治. 利用动态密勒补偿电路解决LDO的稳定性问题[J]. 固体电子学研究与进展, 2005, 25(3): 385-390 |
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| 作者姓名： | 来新泉 解建章 杜鹏程 孙作治 |
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| 作者单位： | 西安电子科技大学电路CAD所,西安,710071;西安电子科技大学电路CAD所,西安,710071;西安电子科技大学电路CAD所,西安,710071;西安电子科技大学电路CAD所,西安,710071 |
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| 摘 要： | 针对LDO稳压器的稳定性问题,设计了一种新颖的动态密勒补偿电路。与传统方法相比,该电路具有恒定的带宽,大大提高了系统的瞬态响应性能;同时将开环增益提高了30 dB左右,使LDO稳压器具有较高的电压调整率和负载调整率。通过具体投片,验证了该方法的正确性和可行性。
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| 关 键 词： | 低压降稳压器 动态密勒补偿 稳定性 P型场效应管电容器 |
| 文章编号： | 1000-3819(2005)03-385-06 |
| 收稿时间： | 2004-09-10 |
| 修稿时间： | 2004-11-18 |
A Dynamic Miller Compensation Circuit for LDO Regulators |
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| LAI Xinquan,XIE Jianzhang,DU Pengcheng,SUN Zuozhi. A Dynamic Miller Compensation Circuit for LDO Regulators[J]. Research & Progress of Solid State Electronics, 2005, 25(3): 385-390 |
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| Authors: | LAI Xinquan XIE Jianzhang DU Pengcheng SUN Zuozhi |
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| Abstract: | A novel dynamic miller compensation circuit was developed in this paper to solve the stability problem of low dropout regulators(LDOs).Compared with conventional methods,it keeps the bandwidth stable to improve the performance of transient response greatly,and increases the open loop gain by 30 dB at the same time, which makes the LDO have higher line regulation and load regulation specification.An IC was fabricated which proved the validity and feasibility of this method. |
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| Keywords: | LDO regulators dynamic miller compensation stability PMOS capacitor |
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