Abstract
Low Dropout Linear Regulator has been widely used in a variety of 3C products, especially the popular portable electronic products in recent years, where extending battery life is the most important thing.Since there are many different modules on electronic circuit, so they need a variety of voltage levels of the DC supply voltage. Thus, the circuit of a system required use multiple voltage regulator circuit, voltage regulator IC plays a very important roles in the performance and stability characteristics of electronic products. In the field of analog IC design can be divided into several parts: A / D, D / A,voltage source, current source, amplifier, and a voltage source which is the very important, because a stable voltage or current source is the basis of analog circuits. Electronic components diodes, resistors, capacitors and transistors, etc. are affected by changes of temperature. Analog design for only a few degrees Celsius temperature difference can cause a tremendous impact. In this paper, the research focus on the design of a low-dropout linear regulator with a stable voltage, the former includes voltage reference generator, error amplifier, feedback network, and Power MOS and is implemented with TSMC 65nm process, operating voltage at 2.5 volt. Due to the linear regulator circuit having a simple structure, low output ripple, less external components, low power consumption and other characteristics. So it is suitable for using in portable electronic products.