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Hello,
I have a customer wondering about the TVS2700 and they typically use zener diodes as protection for an externally connected device. Is this device considered "bidirectional" similar to a traditional zener?
Based on the data sheet TVS2700 it seems likely it is bi-directional like a Zener would be, due to the substrate diode of the NMOS pass device, if the device is biased less that -0.5V, the substrate diode of the NMOS will bias. It would seem the current will not be controlled, but it will act like a clamp and it's probably a pretty big diode as it scales with the MOSFET.
Can you comment if this is the correct thinking and on how the device responds to negative strikes?
Thanks,
Zach
Hi Zach,
The TVS2700 is a uni directional device, below is an IV curve from the datsheet.
For negative ESD strikes, the clamping voltage will be lower since it has a lower breakdown in the negative direction.
If you want a symmetrical breakdown for both polarities, there is also a bi-directional version, TVS2701.
Regards.
Sebastian
