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Part Number: LMZ12002
Tool/software: WEBENCH® Design Tools
about the enable pin of the DC-DC lMZ12002, in the "absolute maximum ratings" part the maximum voltage allowed is V_(EN MAX) = 7V but in another part of the datasheet it is described that is possible to leave pin enable floating for always-on operation, the problem that for this configuration the EN pin is internally pulled up to VIN. and for information, Vin is can be raised to 20 V exceeds V_(EN MAX). It's not contradictory?
I believe the "leave pin enable floating" might be an error in the datasheet. As you mentioned the max enable voltage is 7V abs max. Also Section 8.2.2 details the design procedure, of which you would "select minimum operating Vin with enable divider resistors" to limit the Ven voltage.
As such I'd suggest sticking with the abs max rating for the enable pin. That's my initial thought.
Let me find the assign this thread to another apps engineer who might have more information on the internals of the enable circuit.
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In reply to Jimmy Hua:
Ibrahim, it appears you have asked this same question in this thread: https://e2e.ti.com/support/power-management/f/196/t/921609
Let us continue and close it there.
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