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CSD17381F4: How to make sure the spec of positive or negative max Vgs

Hale Tan
Expert 3765 points
Part Number: CSD17381F4
Other Parts Discussed in Thread: CSD25404Q3, CSD13201W10, , CSD25485F5

Hi team,

I am a little confused about the max Vgs of PMOS. Why does some of the PMOS have positive and negative max Vgs such as CSD25404Q3, CSD13201W10?

CSD17381F4, CSD25485F5 VGS absolute maximum ratings are +12V, -12V respectively. Could you help confirm whether the VGS absolute maximum ratings of these two materials support +/12V at the same time. And if the device didn't give the spec of positive or negative max Vgs, how can we make sure the spec?

  • 0
    TI__Mastermind 36870 points

    Hello Hale,

    Thanks for the inquiry. Sometimes the specs in the datasheet can be confusing. Most of our small form factor FETs in small or chip scale packages include some form of gate ESD protection. For the CSD17381F4, CSD25485F5 the protection is single-ended. The CSD13201W10 and CSD25404Q3 do not include any gate ESD protection. For devices with single-ended protection, the abs max VGS is also single-ended because if VGS is applied in the opposite polarity, the ESD diode will be forward biased and clamp VGS to a junction drop. This is not the case for those devices with no ESD protection or back-to-back ESD protection which will have ±VGS abs max ratings in the datasheet. You may also notice on some older devices that the abs max VGS ratings are not symmetric such as +16V/-12V. That is due to the process in which those devices are fabricated. On page 1 of the datasheet, you will see a schematic symbol of the FET and it will indicate whether it has single-ended, back-to-back or no ESD protection. I'm including a link below to a technical article explaining the types of ESD protection used in TI FETs. Let me know if you have any additional questions.

    https://e2e.ti.com/blogs_/b/powerhouse/archive/2020/06/22/what-type-of-esd-protection-does-your-mosfet-include

    Best Regards,

    John Wallace

    TI FET Applications