Invention Grant
- Patent Title: Snapback clamps for ESD protection with voltage limited, centralized triggering scheme
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Application No.: US16438682Application Date: 2019-06-12
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Publication No.: US11056879B2Publication Date: 2021-07-06
- Inventor: Michael A. Stockinger , Marcin Grad , Paul Hendrik Cappon , Sjoerd Bruinsma
- Applicant: NXP USA, Inc.
- Applicant Address: US TX Austin
- Assignee: NXP USA, Inc.
- Current Assignee: NXP USA, Inc.
- Current Assignee Address: US TX Austin
- Main IPC: H02H9/04
- IPC: H02H9/04 ; H01L27/02 ; H01L27/06

Abstract:
An apparatus for electrostatic discharge protection. In one embodiment, an integrated circuit (IC) includes a trigger circuit configured to generate a trigger voltage VT in response to an electrostatic discharge (ESD) event. A plurality of metal oxide semiconductor (MOS) transistors are coupled to the trigger circuit. The plurality of MOS transistors are configured to conduct ESD current from a plurality of circuit nodes, respectively, to a ground conductor in response to the trigger circuit generating the trigger voltage VT. A voltage limiter circuit is also included and is configured to limit the trigger voltage VT.
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