标题: | 无外部电容的CMOS低压差线性稳压器 A Capacitor-Free CMOS Low Dropout Linear Voltage Regulator |
作者: | 曾南雄 Nan-Hsiung Tseng 陈科宏 Ke-Horng Chen 电机学院IC设计产业专班 |
关键字: | 无外部电容;低压差线性稳压器;A Capacitor-Free;Linear Voltage Regulator |
公开日期: | 2006 |
摘要: | 近年来,由于可携式电子产品的快速发展,开发低功耗的电路来延长电池寿命己成为主要的研究主题。同时为了达到产品的轻薄、短小,将电路积体化及减少外部元件的使用已经是必要的趋势。 一般的电源管理系统通常会包含几组低压差线性稳压器及交换式的直流转换器。传统的低压差线性稳压器需要一个很大的输出电容大约几微法拉,如此大的电容并不容易作在IC内部,并且需要占据较大的电路板面积及成本。本论文的目标是设计一个无需外部电容的低压差线性稳压器,此低压差线性稳压器是架构在三级的放大器设计,能同时兼顾稳定度、精准度、暂态响应及其它各项效能。所设计的规格是最大负载电流100mA,输入电压在1.5V~4.5V,输出电压在1.3V, ,Dropout Voltage 在200mV,使用TSMC 0.35μm 2P4M CMOS制程,包含参考电压源仅消耗46μA的静态电流。实验的结果证明所实作的低压差线性稳压器在稳定度及暂态响应都符合所预期的规格。因此,此低压差线性稳压器适合于SOC的环境使用。 In the recent years, developing of low power circuits to extend battery life has become a critical research topic due to explosion growing of portable electric devices. In order to make products smaller and thinner, this is a necessary trend to integrate the circuit and reduce the external component. A power management system usually contains serval LDO regulators and switching regulators.The conventional LDO voltage regulator requires a very large output capacitor in the single microfarad range.Large microfarad capacitors can not easy integrated in IC, and take over a large area of PCB, consuming cost. The target of this paper is to design a low dropout linear voltage regulator without external capcitor. This LDO is based on three stage amplifiers design, and also consider the stability, resolution, transient response and other performances. The design of specification is shown is the following: The maxmium load current is 100mA. The input voltage is ranged from1.5V to 4.5V. The output voltage is 1.3V. The dropout voltage is 200mV. The quiescent current is consuming only 46uA containing the bandgap reference. This LDO is fabricated by TSMC 0.35um 2P4M process. Experimental results show that the proposed capacitor-free LDO voltage regulator is achieved the expected specification of stability and transient response.Thus, the proposed capacitor-free LDO voltage regulator is suitable for SoC solution. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT009395521 http://hdl.handle.net/11536/80356 |
显示于类别: | Thesis |
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