The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Design >> Mixed-Signal Design >> large driver need ESD
https://designers-guide.org/forum/YaBB.pl?num=1460623943

Message started by zelda on Apr 14^th, 2016, 1:52am

Title: large driver need ESD
Post by zelda on Apr 14^th, 2016, 1:52am

Hi

If the Tx drivers which have large width, do they still need ESD protection like gated PMOS & gated NMOS? assuming total tx driver size is more than min ESD requirement like min 300um

Title: Re: large driver need ESD
Post by raja.cedt on Apr 15^th, 2016, 3:54am

You will still need some ESD for +vs Zap, because transistor drain to bulk diode always give only one side protection..

Best Regards,
Raj.

Title: Re: large driver need ESD
Post by zelda on Apr 20^th, 2016, 2:15am

hi Raj,

could you explain more in details?
why should it need more ESD protection?
the driver has met min length and min total width requirement.

Title: Re: large driver need ESD
Post by raja.cedt on Apr 20^th, 2016, 8:10am

I mean every transistor Drain has it's own diode, so it is self protective up to some extent in one direction, that's why people add big gurad ring so that it is even more effective but this can't add diode in another direction.