公开(公告)号：US09893724B2

公开(公告)日：2018-02-13

申请号：US15180775

申请日：2016-06-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tri C. Nguyen ,  Md. Abidur Rahman ,  David J. Baldwin

IPC: H03K17/16 ,  H03K17/284 ,  H01L27/092 ,  H03K5/07 ,  H03K5/08 ,  H03K17/06

CPC classification number: H03K17/162 ,  H01L27/0928 ,  H03K5/07 ,  H03K5/08 ,  H03K17/163 ,  H03K17/284 ,  H03K2017/066

Abstract: A semiconductor device includes an output switching device having an input node, an output node, and a control input node. The control input node enables an input voltage applied to the input node to be switched to the output node. A gate pull-down circuit controls the control input node of the output switching device in response to at least one control signal. The gate pull-down circuit activates the output switching device by raising the voltage level of the control input node above the voltage level of the output node and deactivates the output switching device by clamping the control input node to the voltage level of the output node. A gate pull-up circuit receives an enable signal and generates the at least one control signal to the gate pull-down circuit in response to the enable signal.

公开(公告)号：US09755638B2

公开(公告)日：2017-09-05

申请号：US14938702

申请日：2015-11-11

Applicant: Texas Instruments Incorporated

Inventor： Vikrant Dhamdhere ,  Kyle Schulmeyer ,  Md. Abidur Rahman

IPC: H03K3/00 ,  H03K17/687 ,  H02M1/32

CPC classification number: H03K17/687 ,  H01L2924/0002 ,  H02M1/08 ,  H02M2001/322 ,  H03K17/063 ,  H03K19/0016 ,  H03K2217/0054 ,  H03K2217/0063 ,  H03K2217/0072 ,  H03K2217/0081 ,  H01L2924/00

Abstract: An output discharge circuit for a load switch may include a capacitor coupled between a power rail of the output discharge circuit and a ground lead, and a diode coupled between a power input of the output discharge circuit and the power rail. The output discharge circuit may charge the capacitor via a current path formed by the diode while power is being supplied to the load switch. When the power supply to the output discharge circuit is turned off, the diode may prevent the capacitor from discharging through the current path, and the stored charge on the capacitor may be used to power the output discharge switch for a period of time after the power supply has been turned off. In this way, the output discharge circuit may continue to discharge the output of the load switch even when power is no longer being supplied to the load switch.