A 4.7 μA Quiescent Current, 450 mA CMOS Low-Dropout Regulator with Fast Transient Response

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概要

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• This paper presents a new low-dropout (LDO) regulator with low-quiescent, high-drive and fast-transient performance. This is based on a new composite power transistor composed of a shunt feedback class-AB embedded gain stage and the application of dynamic-biasing schemes to both the error amplifier as well as the composite power transistor. The proposed LDO regulator has been simulated and validated using BSIM3 models and GLOBALFOUNDRIES 0.18-µm CMOS process. The simulation results have shown that the LDO regulator consumes 4.7µA quiescent current at no load, regulating the output at 1V from a minimum 1.2V supply. It is able to deliver up to 450mA load current with a dropout of 200mV. It can be stabilized using a 4.7µF output capacitor with a 0.1Ω ESR resistor. The maximum transient output voltage is 64.6mV on the basis of a load step change of 450mA/10ns under typical condition. The full load transient response is less than 350ns.

• 2011-08-01

著者

• Chan Pak

  The School Of Electrical And Electronic Engineering Nanyang Technological University

• Chong Sau

  The School Of Electrical And Electronic Engineering Nanyang Technological University

• Chan Pak

  The School Of Electrical & Electronic Engineering Nanyang Technological University

• KWANTONO Hendra

  the School of Electrical and Electronic Engineering, Nanyang Technological University

関連論文

• A 4.7 μA Quiescent Current, 450 mA CMOS Low-Dropout Regulator with Fast Transient Response
• An Ultra-Low Voltage Analog Front End for Strain Gauge Sensory System Application in 0.18μm CMOS

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