PNP CONTROLLED ESD PROTECTION DEVICE WITH HIGH HOLDING VOLTAGE AND SNAPBACK
Abstract:
An ESD protection device protects a circuit from TLPs between a first terminal and a second terminal. The device includes an NPN discharge structure and a PNP triggering device. The first terminal is coupled to the p-doped emitter and the n-doped base of the PNP triggering device and also the n-doped emitter of the NPN discharge structure. The second terminal is coupled to the n-doped collector of the NPN discharge structure. The p-doped collector of the PNP triggering device is coupled to the p-doped base of the NPN discharge structure. A TLP causes base-collector junction breakdown in the PNP triggering device, which results in a current through the PNP triggering device. That current is injected into the base of the NPN discharge structure, which results in a larger discharge current through the NPN discharge structure. The device provides high holding voltage ESD protection device with snapback.
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