topic Re: FS04 in 48V platform in Other NXP Products

FS04 in 48V platform

FV159 — Thu, 01 Oct 2026 12:53:57 GMT

Hello,

I'm considering a NXP CPU (SN32N55) arrangement for a new 48V automotive platform.

Can the FS04 PMIC be connected to the 48V battery? There's going to be some short transients above 60V (its absolute maximum supply rating) as shown in the table. Can it survive that? If not what protection could be used to achieve it?

Thank you very much in advance.

Re: FS04 in 48V platform

ErikaC — Thu, 01 Oct 2026 21:28:46 GMT

Hello,

The FS04’s maximum continuous operating voltage is 36 V. It is validated at 48 V only for 15 minutes at room temperature for jump-start, and it can sustain a 58 V load dump without external protection.

The 60 V rating is an absolute maximum, not an operating or guaranteed-survival limit. A transient above 60 V can cause malfunction or permanent damage.

The protection should keep VSUP below 36 V during continuous operation.

Hope this helps!

Re: FS04 in 48V platform

FV159 — Fri, 02 Oct 2026 08:49:39 GMT

Got it, thanks!