【作者】 张娜娜；

【导师】 梁齐；

【作者基本信息】 合肥工业大学 ， 微电子学与固体电子学， 2007， 硕士

【摘要】 随着手机的不断普及和手机功能的不断增加，对电源管理的要求也更加复杂和严格。目前，电源管理集成电路市场大部分被国外产品占据，研究和开发国内的电源管理电路产品，能夺回巨大的市场。因此，开展本课题的研究具有特别重大的现实意义。本文设计了一款高电源抑制比低压差线性稳压器芯片，它采用TSMC 0.6微米CMOS工艺设计，有良好的电源抑制比(低频超过90dB，高频40dB左右)，支持较宽的输入电压范围(3.0V-5.5V)，输出电压为2.8V，在典型电流(150mA)情况下，压差为160mv。该电路主要用作对电源敏感的后级电路(如射频电路、VCO等)的电源电压。此外，芯片中还集成了过流保护电路和过热保护电路，保证电路的安全工作。基于以上技术优势，该芯片具有高电源抑制比、低输出噪声的特点，同时外围电路简单，大大降低了设计成本，适用于手机、数码相机、MP3播放器、PDA等手提移动设备的供电模块。在本文中首先阐述了低压差线性稳压器的基本理论，包括基本工作原理和主要的电路指标；然后根据性能需要进行了深入的技术研究和完整的电路设计；最后详细分析并解决了低压差线性稳压器设计中的难点和关键点。借助设计软件Cadence和Spectra对电路进行了完整的设计和仿真，给出了合理的电路数据。仿真结果表明该电路实现了设计功能，达到了设计之初制定的设计指标。最后对全文进行了总结，并结合已经完成的研究内容提出了对下一步工作的展望。更多还原

【Abstract】 With the prevalence of handsets, the requirement for power management is becoming more complex and more rigid. At present, many aboard companies still occupy the most market of power management ICs. And it has much great importance to require such a big market. Therefore, it is of great importance to study the low-dropout (LDO) linear voltage regulator circuit.The object of this thesis is to design a high power supply rejection ratio (PSRR) low-dropout (LDO) linear voltage regulator. It adopts TSMC 0.6μm CMOS process, which has the high power supply rejection ratio (more than 90dB at low frequency, around 40dB at high frequency), wide input voltage range (3.0V-5.5V). The output voltage is 2.8V. When the load current is 150mA, the dropout voltage is only 160mv. The circuit is primarily used to power supply of the circuit, which is sensitive to power ripple, such as RF, VCO and so on. In addition, the thermal shutdown and current limit sub-blocks are also integrated in this chip, which guarantee the electric circuit working in safe operation area. The IC has high PSRR and low output noise based on the above technical advantages. At the same time, it has the most simple outer circle circuit, greatly reducing the cost. It is used as power supply for those systems: handset, MP3 player, PDA, numeral camera and so on.During circuit designing, the basic theory of LDO linear voltage regulator, including basic working principle and the main circuit parameters, is given first. Then the technique is studied and the whole circuit of the IC is designed based on the performance requirement. Finally, the keys and difficulties of LDO linear voltage regulator are studied and solved. Applying Cadence and Spectra, the whole chip and its sub-block circuits are simulated, and more, the reasonable electric circuit datas are given. The simulation results indicate that the IC has achieved their function object.At the end of this thesis, a conclusion is drawn and the prospect of future work is given combined with finished research.更多还原