公开(公告)号：US20160370816A1

公开(公告)日：2016-12-22

申请号：US14740386

申请日：2015-06-16

申请人： Silicon Laboratories Inc.

发明人： Dazhi Wei ,  Gang Yuan ,  Erik Pankratz ,  Imranul Islam ,  Praveen Kallam ,  Axel Thomsen ,  Kenneth Wilson Fernald ,  Jinwen Xiao

IPC分类号： G05F1/575

CPC分类号： G05F1/575 ,  G05F1/56 ,  H02M3/1588 ,  Y02B70/1466

摘要： In one embodiment, an apparatus includes a controller to control a voltage regulator. The controller may have a first comparator circuit to compare a first reference voltage to a feedback voltage. In turn, the first comparator circuit may include: a first comparator having a first input terminal to receive the feedback voltage and a second input terminal to receive the reference voltage and an output node to output an error signal based on the comparison; and a first pre-charge circuit coupled between the first input terminal and the output node configured to pre-charge a first portion of a compensation network to a pre-charge level. The first controller may further include a second comparator circuit coupled to the first comparator circuit compare the error signal to a ramp signal and to generate a first control output to control a power train of the voltage regulator in a first mode of operation.

摘要翻译： 在一个实施例中，一种装置包括用于控制电压调节器的控制器。 控制器可以具有第一比较器电路，以将第一参考电压与反馈电压进行比较。 反过来，第一比较器电路可以包括：第一比较器，具有用于接收反馈电压的第一输入端子和用于接收参考电压的第二输入端子和输出节点，以基于该比较来输出误差信号; 以及耦合在所述第一输入端子和所述输出节点之间的第一预充电电路，被配置为将补偿网络的第一部分预先充电到预充电电平。 第一控制器还可以包括耦合到第一比较器电路的第二比较器电路，将误差信号与斜坡信号进行比较，并产生第一控制输出，以在第一操作模式下控制电压调节器的传动系。

公开(公告)号：US09958888B2

公开(公告)日：2018-05-01

申请号：US14740386

申请日：2015-06-16

申请人： Silicon Laboratories Inc.

发明人： Dazhi Wei ,  Gang Yuan ,  Erik Pankratz ,  Imranul Islam ,  Praveen Kallam ,  Axel Thomsen ,  Kenneth Wilson Fernald ,  Jinwen Xiao

IPC分类号： G05F1/575 ,  G05F1/56 ,  H02M3/158

CPC分类号： G05F1/575 ,  G05F1/56 ,  H02M3/1588 ,  Y02B70/1466

摘要： In one embodiment, an apparatus includes a controller to control a voltage regulator. The controller may have a first comparator circuit to compare a first reference voltage to a feedback voltage. In turn, the first comparator circuit may include: a first comparator having a first input terminal to receive the feedback voltage and a second input terminal to receive the reference voltage and an output node to output an error signal based on the comparison; and a first pre-charge circuit coupled between the first input terminal and the output node configured to pre-charge a first portion of a compensation network to a pre-charge level. The first controller may further include a second comparator circuit coupled to the first comparator circuit compare the error signal to a ramp signal and to generate a first control output to control a power train of the voltage regulator in a first mode of operation.

公开(公告)号：US10193545B1

公开(公告)日：2019-01-29

申请号：US15687781

申请日：2017-08-28

申请人： SILICON LABORATORIES INC.

发明人： Erik Pankratz ,  Arnab Dutta

IPC分类号： H03L7/00 ,  H03K17/22 ,  H03K19/0185 ,  H03K5/24

摘要： A POR circuit for a secondary supply domain of an IC. A bias and reference circuit provides startup current and a reference voltage for a comparator. The comparator compares the reference voltage with a primary supply voltage and develops a bias current. The bias and reference circuit and the comparator includes a VGS loop which mirrors the bias current to develop the reference voltage. When the comparator switches, the bias current is at the low quiescent current level. A level shift and isolation circuit initially isolates a primary POR signal from the secondary domain. When the comparator switches, the primary POR signal is detected and level shifted to control the reset state. The delay circuit senses ramping of the secondary supply voltage and provides a delayed secondary POR signal a predetermined time period after the secondary supply voltage achieves a predetermined voltage threshold to additionally control the reset state.