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Design of a Novel Low Voltage LDO

Author: BaiWenJuan
Tutor: MaoLingFeng
School: Suzhou University
Course: Microelectronics and Solid State Electronics
Keywords: LDO Low pressure Error amplifier Territory
CLC: TN86
Type: Master's thesis
Year: 2010
Downloads: 168
Quote: 2
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Abstract


LDO is a power management , and has a small area , high power supply rejection ratio , micro -power , low- noise , good linear transient response and load transient response characteristics and simple external circuit . LDO is mainly used in a variety of low-voltage portable devices , as well as a variety of IC circuit embedded power supply system , to provide a flexible, efficient , and reliable power management scheme . On the basis of the analysis of a variety of low-voltage LDO structure of a new structure , designed a 0.18μm CMOS process LDO low dropout linear voltage regulator . The LDO circuit has two low - voltage op amp solutions , finally adopted the folded low bandgap and folding common source op amp common-gate structure , in order to ensure the overall stability of the LDO Miller compensation , has a very low input and output voltage poor, ultra-low quiescent current , good load regulation capability , linear adjustment ability and good power suppression characteristics , in addition, it has over-temperature protection and short-circuit protection circuit to ensure the safety of the work . The circuit with simple external device can provide a flexible, efficient , and reliable power solutions for a variety of electronic products , greatly reducing design cost . Design work is completed , the the HSPICE software on various sub-modules of the chip and the overall circuit simulation. On this basis , draw the LDO linear regulator territory . HSPICE simulation results show that the various sub-modules , as well as the electrical characteristics of the overall circuit parameters meet the requirements of the design specifications .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Power supply
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