摘要
According to the requirements of the bus terminal regulator,a linear regulator with 3-A source-sink current ability is presented.The use of the NMOS pass transistor and load current feedback technique enhances the system current ability and response speed.The method of adaptive zero compensation realizes loop stability over the whole load range for either source or sink loop.Furthermore,the transconductance matching technique reduces the shoot-through current through the output stage to less than 3μA.The regulator has been fabricated with a 0.6-μm 30 V BCD process successfully,and the area size is about 1 mm;.With a 20μF output capacitor, the maximum transient output-voltage variation is within 3.5%of the output voltage with load step changes of±2 A/lμs.At the load range of±3 A,the variation of output voltage is less than±15 mV.
According to the requirements of the bus terminal regulator,a linear regulator with 3-A source-sink current ability is presented.The use of the NMOS pass transistor and load current feedback technique enhances the system current ability and response speed.The method of adaptive zero compensation realizes loop stability over the whole load range for either source or sink loop.Furthermore,the transconductance matching technique reduces the shoot-through current through the output stage to less than 3μA.The regulator has been fabricated with a 0.6-μm 30 V BCD process successfully,and the area size is about 1 mm^2.With a 20μF output capacitor, the maximum transient output-voltage variation is within 3.5%of the output voltage with load step changes of±2 A/lμs.At the load range of±3 A,the variation of output voltage is less than±15 mV.
基金
supported by the National Natural Science Foundation of China(Nos.60806043,60806009)
the Special Fund for Basic Scientific Research of Central Colleges Chang'an University,China(No.CHD2010JC077)
the Key Laboratory Foundation of Shaanxi Engineering and Technique Research Center for Road and Traffic Detection,China
