What characteristic is NOT associated with an ideal power supply?

An ideal power supply is characterized by several key attributes. The defining features include the ability to provide a constant voltage, not allowing voltage drop under load, and ideally having zero internal resistance.

With this understanding, the characteristic of supplying limited current stands out as not being aligned with what one expects from an ideal power supply. An ideal power supply would theoretically be able to supply any amount of current without affecting the output voltage. In reality, power supplies have limitations on current based on their design and specification, but an ideal one would not impose such restrictions. Thus, the ideal power supply is expected to provide not just a constant voltage, but also to adapt to the current demands of the circuit without any limitation.

Conversely, providing constant voltage, having infinite internal resistance, and not varying voltage are all characteristics that would typically be associated with an ideal power supply. An infinite internal resistance would mean that the power supply does not draw any current itself, ensuring that the output voltage remains unaffected by any load connected to it.