CSD95372BQ5M: Absolute maximum rating of VSW

Shota Kobayashi

Part Number: CSD95372BQ5M
Other Parts Discussed in Thread: CSD95377Q4M

Hello, E2E

Our product uses CSD95372BQ5M and CSD95377Q4M.
And we are evaluating them now.

The following undershoots are detected from the waveform of the VSW pin in normal operation.
1) -1.31 V (11 ns) at CSD95372BQ5M.
2) -1.03 V (13.5 ns) at CSD95377Q4M.

These are above the absolute maximum rating for "VSW to PGND", could they damage the device?

Best Regards,
Kobayashi

over 2 years ago

0 Nastasha over 2 years ago

TI__Genius 10000 points

Hi Kobayashi-san,

We recommend always staying within the absolute max / min ratings to prevent quality issues or damage.

Thanks,

Nastasha

0 Shota Kobayashi over 2 years ago in reply to Nastasha

Prodigy 30 points

Hi, Nastasha,

Thank you for your reply.

I found a similar question at E2E.
e2e.ti.com/.../csd95372bq5m-absolute-maximum-ratings-vsw-to-pgnd

Can't I think in the same way?

Best regards,
Kobayashi

0 Qingquan Tang over 2 years ago in reply to Shota Kobayashi

TI__Expert 3525 points

Hi Kobayashi-san,

Yes, you are correct. It is similar topic and -0.3V is the DC spec.

0 Shota Kobayashi over 2 years ago in reply to Qingquan Tang

Prodigy 30 points

Hi Qingquan,

Considering the AC specifications, is my case okay?

OK　　-7V (<10ns)　　：From datasheet.
OK　　-1.1V (20ns) ：Yaita-san's case.
OK？　-1.31V (11ns) ：my case 1.
OK？　-1.03V (13.5ns) ：my case 2.

Best regards,
Kobayashi

+1 Qingquan Tang over 2 years ago in reply to Shota Kobayashi

TI__Expert 3525 points

Hi Kobayashi-san,

You cases are fine. the body diode should protect against the negative spike.

Power management

Power management forum

CSD95372BQ5M: Absolute maximum rating of VSW