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设计了一款适用于高压电源芯片的无片外电容快速瞬态响应型自启动低压差线性稳压器(LDO)。该LDO与芯片内部基准电路形成自供电自偏置环路,节省了芯片面积,适用电压范围为3.6~16.0 V,输出电压为5.10 V,具有功耗低、带宽宽等特点。电路采用Hspice进行仿真验证,在典型工艺角下,负载电流经100 mA/μs突变时,输出电压突变量最大为98 mV;在两种极端工艺角下,输出电压突变量最大为111 mV。环路特性仿真验证表明,该LDO带宽为3.6 MHz,3 dB带宽为2.5 MHz,相位裕度约75°,片内补偿电容仅3 pF。 相似文献
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An operational amplifier (OP-AMP) with a ground current of about 0.6μA is presented.Moreover,this amplifier reaps the benefits of incorporating a foldback current limiting circuit,which enables the low-dropout voltage regulator without the need of a special current limiting subblock.Therefore,the object of ultra-low power is realized because of a great reduction in transistors and current limbs. 相似文献
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系统的低功耗设计已成为现代数字电路的一种趋势,单一电源供电系统正逐渐被以低电源电压器件为主的混合电路所取代.DSP器件的电源供电系统以及DSP本身也逐渐向高性能低功耗方向发展,由于现在的高性能DSP器件降低功耗的同时必须考虑到外围器件的电源特性,大多都是以降低DSP和CPU内核电源电压为主,所以对DSP提供电源电压的电源模块,必须考虑到DSP两种电压的供电特性.本文在介绍系统低功耗设计的基础上,通过对以往的电源设计的分析,详细给出了由TI公司的TPS56300和TPS3305-18构成对TMS320C6201提供电源和电源监测的实际应用电路并说明了其特点. 相似文献
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当输入电压或者负载电流变化时低压差线性稳压器(LDO)系统稳定性是其研究热点和设计难点.针对这一问题,设计了一款加入动态补偿电路的快速响应LDO,这种新颖的LDO结构能有效改善在不同负载电流或者输入电压下系统的稳定性能.其适用电压范围为4.5~16.0V,输出电压5.0V,具有低功耗、带宽宽等特性.使用Hspice软件对设计的LDO进行了仿真验证,在典型工艺角下,负载电流经100 mA/μs突变时,输出电压突变量最大为105 mV,响应恢复时间平均约2.1 μs.环路特性仿真结果表明,该LDO带宽为4.9 MHz,3 dB带宽为3.5MHz,相位裕度为约76°,且片内补偿电容仅0.3 pF. 相似文献
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A transient performance optimized CCL-LDO regulator is proposed.In the CCL-LDO,the control method of the charge pump phase-locked loop is adopted.A current control loop has the feedback signal and reference current to be compared,and then a loop filter generates the gate voltage of the power MOSFET by integrating the error current.The CCL-LDO has the optimized damping coefficient and natural resonant frequency, while its output voltage can be sub-l-V and is not restricted by the reference voltage.With a 1μF decoupling capacitor,the experimental results based on a 0.13μm CMOS process show that the output voltage is 1.0 V;when the workload changes from 100μA to 100 mA transiently,the stable dropout is 4.25 mV,the settling time is 8.2μs and the undershoot is 5.11 mV;when the workload changes from 100 mA to 100μA transiently,the stable dropout is 4.25 mV,the settling time is 23.3μs and the overshoot is 6.21 mV.The PSRR value is more than -95 dB.Most of the attributes of the CCL-LDO are improved rapidly with a FOM value of 0.0097. 相似文献