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1. 发明申请

US20150326226A1 LOAD SWITCH FOR CONTROLLING ELECTRICAL COUPLING BETWEEN POWER SUPPLY AND LOAD 有权
标题翻译：用于控制电源和负载之间的电气耦合的负载开关
公开(公告)号：US20150326226A1
公开(公告)日：2015-11-12
申请号：US14272149
申请日：2014-05-07
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Alok Kumar , Fenish Padinjaroot Prakasan , Rajkumar Jayaraman , Kalyan Cherukuri , Praveen Krishnamurthy
IPC分类号： H03K19/0185
CPC分类号： H03K19/018571 , H03K19/0016 , H03K19/0027
摘要： Circuits and methods for controlling electrical coupling by a load switch are disclosed. In an embodiment, the load switch includes a pass element, level-shift circuit and low-resistance active path. The pass element is configured to be coupled to a power supply and a load, and is configured to electrically couple the power supply with the load during ON-state and electrically decouple the power supply from the load during OFF-state. The level-shift circuit includes a first transistor and pull-up resistor and is configured to generate a level-shifted signal in response to an enable signal, and enable the ON-state and the OFF-state of the pass element based on first and second voltages of the level-shifted signal. The low-resistance active path is coupled in parallel with the pull-up resistor for shunting the pull-up resistor in the OFF-state by providing a path for a leakage current of the first transistor in the OFF-state.
摘要翻译：公开了一种通过负载开关来控制电耦合的电路和方法。在一个实施例中，负载开关包括通过元件，电平移位电路和低电阻有源通路。通过元件被配置为耦合到电源和负载，并且被配置为在导通状态期间将电源与负载电耦合，并且在关闭状态期间使电源与负载电耦合。电平移位电路包括第一晶体管和上拉电阻，并且被配置为响应于使能信号产生电平移位信号，并且基于第一和第二晶体管的通态元件的导通状态和截止状态电平移位信号的第二电压。低电阻有源路径与上拉电阻并联耦合，用于通过在第一晶体管的截止状态下提供漏电流的路径来将上拉电阻器分流到截止状态。

2. 发明授权

US09287875B2 Load switch for controlling electrical coupling between power supply and load 有权
标题翻译：用于控制电源和负载之间的电气耦合的负载开关
公开(公告)号：US09287875B2
公开(公告)日：2016-03-15
申请号：US14272149
申请日：2014-05-07
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Alok Kumar , Fenish Padinjaroot Prakasan , Rajkumar Jayaraman , Kalyan Cherukuri , Praveen Krishnamurthy
IPC分类号： H03L5/00 , H03K19/0185
CPC分类号： H03K19/018571 , H03K19/0016 , H03K19/0027
摘要： Circuits and methods for controlling electrical coupling by a load switch are disclosed. In an embodiment, the load switch includes a pass element, level-shift circuit and low-resistance active path. The pass element is configured to be coupled to a power supply and a load, and is configured to electrically couple the power supply with the load during ON-state and electrically decouple the power supply from the load during OFF-state. The level-shift circuit includes a first transistor and pull-up resistor and is configured to generate a level-shifted signal in response to an enable signal, and enable the ON-state and the OFF-state of the pass element based on first and second voltages of the level-shifted signal. The low-resistance active path is coupled in parallel with the pull-up resistor for shunting the pull-up resistor in the OFF-state by providing a path for a leakage current of the first transistor in the OFF-state.
摘要翻译：公开了一种通过负载开关来控制电耦合的电路和方法。在一个实施例中，负载开关包括通过元件，电平移位电路和低电阻有源通路。通过元件被配置为耦合到电源和负载，并且被配置为在导通状态期间将电源与负载电耦合，并且在关闭状态期间使电源与负载电耦合。电平移位电路包括第一晶体管和上拉电阻，并且被配置为响应于使能信号产生电平移位信号，并且基于第一和第二晶体管的通态元件的导通状态和截止状态电平移位信号的第二电压。低电阻有源路径与上拉电阻并联耦合，用于通过在第一晶体管的截止状态下提供漏电流的路径来将上拉电阻器分流到截止状态。

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