公开(公告)号：US20160373004A1

公开(公告)日：2016-12-22

申请号：US14901482

申请日：2014-05-30

Applicant: CSMC TECHNOLOGIES FAB1 CO., LTD.

Inventor： Nan ZHANG

IPC: H02M1/36

CPC classification number: H02M1/36 ,  H02M2001/0006

Abstract: A starting circuit (10) of a power management chip, comprising: a starting capacitor (C3) which is used for connecting a power supply via an external resistor (R2) to perform charging; a switch circuit (100) which is connected between the external resistor (R2) and the starting capacitor (C3); a voltage detection circuit (200) which is used for detecting a voltage on the starting capacitor (C3) and is connected to the switch circuit (100) so as to control the on/off switching of the switch circuit (100); and a voltage maintaining circuit (300) which is connected between the starting capacitor (C3) and an operating circuit of the power management chip and is used for acquiring a voltage that maintains the starting capacitor (C3) from the operating circuit of the power management chip, wherein when the voltage detection circuit (200) detects that the starting capacitor (C3) reaches the starting voltage of the power management chip, the broken circuit of the switch circuit (100) is controlled. Further provided is a power management chip including the above-mentioned starting circuit (10). Disconnecting an external power source from the starting capacitor after the operating circuit of the power management chip is started can reduce the electric energy consumption.

Abstract translation: 一种电源管理芯片的起动电路（10），包括：起动电容器（C3），用于经由外部电阻器（R2）连接电源以进行充电; 连接在外部电阻器（R2）和起动电容器（C3）之间的开关电路（100）; 用于检测起动电容器（C3）上的电压并连接到开关电路（100）的电压检测电路（200），以控制开关电路（100）的接通/断开开关; 以及连接在起动电容器（C3）和电源管理芯片的工作电路之间的电压保持电路（300），用于从电源管理的操作电路获取维持起动电容器（C3）的电压 芯片，其中当电压检测电路（200）检测到启动电容器（C3）达到电源管理芯片的启动电压时，开关电路（100）的断路被控制。 还提供了包括上述启动电路（10）的电源管理芯片。 在启动电源管理芯片的工作电路之后，断开外部电源与启动电容的连接可以减少电能消耗。

公开(公告)号：US20170212539A1

公开(公告)日：2017-07-27

申请号：US15327916

申请日：2015-08-18

Applicant: CSMC TECHNOLOGIES FAB1 CO., LTD.

Inventor： Nan ZHANG ,  Jing ZHOU

IPC: G05F1/46 ,  G05F1/575 ,  G05F1/56

CPC classification number: G05F1/468 ,  G05F1/56 ,  G05F1/575

Abstract: A low dropout linear regulator circuit comprises a voltage reference source module (100), an error amplifier (200), a reference voltage determining module (300), a power transmission device (400) and a feedback module (500); wherein the voltage reference source module (100) provides a reference voltage for the error amplifier (200), the reference voltage determining module (300) controls an enablement of the error amplifier (200) according to whether the voltage reference source module (100) is completely started, the error amplifier (200) controls ON/OFF of the power transmission device (400) according to the reference voltage provided by the voltage reference source module (100) and a feedback voltage provided by the feedback module (500). A chip having the above low dropout linear regulator circuit and a electronic device having the above chip are provided.