公开(公告)号：US20140266106A1

公开(公告)日：2014-09-18

申请号：US13916252

申请日：2013-06-12

申请人： Vidatronic, Inc.

发明人： Mohamed Ahmed Mohamed El-Nozahi ,  Mohamed Mostafa Saber Aboudina ,  Sameh Assem Ibrahim ,  Faisal Abdellatif Elseddeek Ali Hussien ,  Moises Emanuel Robinson

IPC分类号： G05F1/575

CPC分类号： G05F1/575 ,  G05F1/565 ,  G05F1/573

摘要： A novel architecture and method to maintain stability of a low drop-out (LDO)/load switch linear voltage regulator (LVR). The architecture and method also support optionally determining, during a power-up phase and by a capacitance sensing circuit, an estimated output capacitance value at an output node of the LDO/load switch LVR, and adjusting, based on the estimated output capacitance value, an adaptive RC network in the LDO/load switch LVR, wherein the adaptive RC network produces an adaptive zero in a feedback network transfer function of the LDO/load switch LVR, wherein the adaptive zero reduces an effect of a non-dominant pole in the open loop transfer function of the LDO/load switch LVR, and wherein a frequency of the adaptive zero is inversely proportional to the estimated output capacitance value.

摘要翻译： 一种保持低压降（LDO）/负载开关线性稳压器（LVR）稳定性的新颖结构和方法。 该架构和方法还支持在上电阶段和电容检测电路中可选地确定LDO /负载开关LVR的输出节点处的估计输出电容值，并且基于估计的输出电容值， LDO /负载开关LVR中的自适应RC网络，其中自适应RC网络在LDO /负载开关LVR的反馈网络传递函数中产生自适应零，其中自适应零减少非主导极在 LDO /负载开关LVR的开环传递函数，并且其中自适应零点的频率与估计的输出电容值成反比。