公开(公告)号：US20160065001A1

公开(公告)日：2016-03-03

申请号：US14843823

申请日：2015-09-02

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Tomoki YASUKAWA ,  Akira OIZUMI ,  Toyohiko YOSHIDA ,  Yoshinori TOKIOKA

IPC: H02J9/06

CPC classification number: H02J9/061 ,  H02J1/10

Abstract: The disclosed invention is intended to prevent malfunction of an internal circuit because of unwanted power supply switching caused by a noise during operation of a semiconductor device powered by a backup power supply, while eliminating wasteful consumption of the backup power supply. A first switching transition time after coupling the main power supply terminal to the internal power supply node until decoupling the backup power supply terminal from the internal power supply node is made longer than a second switching transition time after coupling the backup power supply terminal to the internal power supply node until decoupling the main power supply terminal from the internal power supply node.

Abstract translation: 所公开的发明旨在防止内部电路的故障，因为在由备用电源供电的半导体器件的操作期间由噪声引起的不期望的电源切换，同时消除备用电源的浪费的消耗。 在将备用电源端子连接到内部电源节点之后，将备用电源端子与内部电源节点解耦之前，将主电源端子耦合到内部电源节点之后的第一切换转换时间比第二切换时间长 电源节点，直到主电源端子与内部电源节点断开。

公开(公告)号：US20150155854A1

公开(公告)日：2015-06-04

申请号：US14547997

申请日：2014-11-19

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Keiichi HAYASAKA ,  Toyohiko YOSHIDA ,  Akira OIZUMI ,  Yoshinori TOKIOKA

IPC: H03K3/012 ,  H03K3/037

CPC classification number: H03K19/0008 ,  G06F1/24 ,  G06F1/30

Abstract: There is a need to provide a technology that shortens a time period from a point to start an external power supply for a microcontroller to a point to start operating a logic circuit. A stable voltage supply circuit of a semiconductor circuit accepts an external power supply VCC and supplies a VDD line with one of a power supply voltage to cause a stable output voltage and a power supply voltage to cause an unstable output voltage and fast start. At startup, the semiconductor circuit accepts an external power supply. The semiconductor circuit raises a power supply voltage to cause a stable output voltage and supplies a logic portion initialization circuit with an unstable power supply voltage to fast start, and initializes a VDD operation circuit. When the output voltage is stabilized, the semiconductor circuit changes a power supply voltage supplied to the VDD line and starts operating the VDD operation circuit.

Abstract translation: 需要提供一种技术，其缩短从微控制器的外部电源点开始运行逻辑电路的时间点。 半导体电路的稳定电压供给电路接受外部电源VCC，并且向VDD线提供电源电压中的一个，以产生稳定的输出电压和电源电压，从而导致不稳定的输出电压并快速启动。 在启动时，半导体电路接受外部电源。 半导体电路提高电源电压以产生稳定的输出电压，并向具有不稳定电源电压的逻辑部分初始化电路提供快速启动，并初始化VDD操作电路。 当输出电压稳定时，半导体电路改变提供给VDD线的电源电压，并开始运行VDD运行电路。

公开(公告)号：US20180006491A1

公开(公告)日：2018-01-04

申请号：US15702354

申请日：2017-09-12

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Tomoki YASUKAWA ,  Akira OIZUMI ,  Toyohiko YOSHIDA ,  Yoshinori TOKIOKA

IPC: H02J9/06 ,  H02J1/10

CPC classification number: H02J9/061 ,  H02J1/10

Abstract: The disclosed invention is intended to prevent malfunction of an internal circuit because of unwanted power supply switching caused by a noise during operation of a semiconductor device powered by a backup power supply, while eliminating wasteful consumption of the backup power supply. A first switching transition time after coupling the main power supply terminal to the internal power supply node until decoupling the backup power supply terminal from the internal power supply node is made longer than a second switching transition time after coupling the backup power supply terminal to the internal power supply node until decoupling the main power supply terminal from the internal power supply node.