Electrostatic discharge (ESD) protection circuit with EOS and latch-up immunity
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United States of America Patent
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Apr 25, 2017
Grant Date -
Dec 4, 2014
app pub date -
May 22, 2014
filing date -
May 28, 2013
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Abstract
An electrostatic discharge (ESD) protection circuit with electrical overstress (EOS) and latch-up immunity has a main ESD circuit, a voltage detection circuit and an electrostatic driving circuit. The main ESD circuit is coupled between a first rail and a second rail and has a control end. The main ESD circuit is configured to establish an electrical connection between the first rail and the second rail based on a voltage of the control end. The voltage detection circuit is coupled between the first rail and the second rail for setting the voltage of the control end when a voltage of the first rail is greater than a limiting voltage. The electrostatic driving circuit is used to drive the main ESD circuit when an ESD phenomenon occurs.
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