Design and Implementation of an Adjustable Low Dropout Voltage Regulator

• Main Authors: Bing-You Gau, 高秉佑
• Other Authors: Lih-Yih Chiou
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/02703487778818138149

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 94 === In this thesis, we present an adjustable low dropout (LDO) voltage regulator. Through external control signals, the adjustable low dropout voltage regulator can switch between two or more stable output voltages. Several structures of adjustable LDO linear regulators not only consume large power and area, but also require extremely long recovering time from discharging process. Our proposed adjustable LDO linear regulator consisted of a new adjustable reference voltage generator and a dynamic discharging path has the features of lower power consumption, smaller area, shorter transform time and higher extendibility. The structure of the proposed adjustable reference voltage generator is easy to realize and consumes only 7μA. Both temperature coefficients of the generated reference voltages are below 35ppm/°C. Moreover, if designers want to increase the number of output voltages, they only needs to add extra diode-connected transistors in the current structure. The transform time of the proposed voltage regulator is only about 1.6 m sec for output voltage discharging from 2.5V to 1.0V.