According to the requirements of the bus terminal regulator,a 1inear 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 3 μA.The regulator has been fabricated with a 0.6-μm 30 V BCD process successfully,and the area size is about 1 mm2.With a 20 μF output capacitor,the maximum transient output-voltage variation is within 3.5％ of the output voltage with load step changes of ±2 A/1 μs.At the load range of ±3 A,the variation of output voltage is less than ±15 mV.
参考文献
| [1] | Leung K N,Mok P K T.A capacitive-free CMOS low-dropout regulator with damping-factor-control frequency compensation.IEEE J Solid-State Circuits,2003,38(10):1691 |
| [2] | Lai X Q,Guo J P,Sun Z Z,et al.A 3-A CMOS low-dropout regulator with adaptive compensation.Analog Integrated Circuits and Signal Processing,2006,49(1):5 |
| [3] | Li Yanming,Lai Xinquan,Jia Xinzhang,et al.A fast transient response and low-quiescent current CMOS low-dropout regulator.Acta Electronica Sinica,2009,37(5):1130 |
| [4] | Ma Haifeng,Zhou Feng.Full on-chip and area efficient CMOS LDO with zero to maximum load stability using adaptive frequency compensation.Journal of Semiconductors,2010,31(8):085006 |
| [5] | Wallace D.Source and sink voltage regulator for terminators.United States Patent,No.5608312,1997 |
| [6] | Wei D C,Chia J L,Chu Y S.Dual loop voltage regulation circuit of power supply chip.United States Patent,No.2007/0001749,2007 |
| [7] | Chu Xiuqin,Li Qingwei,Lai Xinquan,et al.A 3 A sink/source current fast transient response low-dropout Gm driven linear regulator.Journal of Semiconductors,2011,32(6):065002 |
| [8] | CM3121 and CM3132 integrated DDR memory power ICs for consumer electronics and computing peripherals.California Micro Devices Corporation,[Online]available:http://www.cmd.com |
| [9] | 3-A sink/source DDR termination regulator.Texas Instruments,[Online]available:http://focus.ti.com |
| [10] | Chen Xiaofei,Zou Xuecheng.Low drop-out regulator based on BiCMOS.J Huazhong University of Sci & Tech (Nature Science Edition),2006,34(5):59 |
| [11] | Ma Zhou,Guo Yang,Duan Zhikui,et al.A fast transient response low dropout regulator with current control methodology.Journal of Semiconductors,2011,32(8):085007 |
| [12] | Al-Shyoukh M,Lee H,Perez R.A transient-enhanced low-quiescent current low-dropout regulator with buffer impedance attenuation.IEEE J Solid-State Circuits,2007,42(8):1732 |
| [13] | Man T Y,Mok P K T,Chan M.A high slew-rate push-pull output amplifier for low-quiescent current low-dropout regulators with transient-response improvement.IEEE Trans Circuits Syst Ⅱ:Express Briefs,2007,54(9):755 |
| [14] | Aloisi W,Di Cataldo G,Giustolisi G,et al.Design guidelines of CMOS class-AB output stages:a tutorial.Analog Integrated Circuits and Signal Processing,2008,56(3):163 |
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