In a negative feedback configuration of an operational amplifier, the output voltage can never exceed the supply voltage limits regardless of the input signal levels.

In a negative‑feedback op‑amp circuit the output is forced to follow the input through the feedback network, but the amplifier itself cannot produce a voltage higher than the supply rails that power it. The feedback keeps the input difference small, so the amplifier’s internal high‑gain drives the output toward the rail voltage until the supply limits it. If the input would try to push the output beyond a rail, the amplifier saturates at that rail voltage and the feedback loop simply stops trying to increase it. For example, with a ±15 V supply, a negative‑feedback circuit will never produce more than about ±14. 5 V even if the input signal is large enough to demand it.