公开(公告)号：US20070247126A1

公开(公告)日：2007-10-25

申请号：US11380064

申请日：2006-04-25

申请人： Ming Xu ,  Yuancheng Ren ,  Fred Lee ,  Andrew Schmit

发明人： Ming Xu ,  Yuancheng Ren ,  Fred Lee ,  Andrew Schmit

IPC分类号： G05F1/00

CPC分类号： H02M3/158 ,  H02M2001/0045

摘要： An active linear regulator circuit in parallel with a filter capacitor of a switching voltage regulator injects current to a load only when the switching regulator and capacitor cannot supply adequate current to follow high frequency load transients in a manner which is compatible with adaptive voltage positioning (AVP) requirements. control of current injection and determination of the insufficiency of current from the switching regulator and capacitors is achieved by impedance matching of the linear regulator to the switching regulator. The linear regulator thus operates at relatively low current and duty cycle to limit power dissipation therein. By matching impedances and increasing the bandwidth of the switching regulator, filter capacitor requirements can be reduced to the point of being met entirely by packaging and/or on-die capacitors which may be placed close to or at the point of load to reduce parasitic inductance, as can the linear regulator.

摘要翻译： 只有当开关稳压器和电容器不能以与自适应电压定位（AVP）兼容的方式提供足够的电流来跟随高频负载瞬变时，与开关电压调节器的滤波电容器并联的有源线性稳压器电路将电流注入到负载 ） 要求。 通过线性稳压器与开关调节器的阻抗匹配来实现电流注入的控制和确定开关调节器和电容器的电流不足。 因此，线性调节器在相对低的电流和占空比下操作以限制其中的功率耗散。 通过匹配阻抗并增加开关稳压器的带宽，可以将滤波电容器的要求降低到完全通过封装和/或片上电容器来满足要求，这些电容器可以放置在接近或负载点以减小寄生电感 ，线性调节器也可以。