Laboratory sources can be thought of as an ideal voltage source (zero ohm output impedance) in series with a 50 ohm resistor. This resistor is shown as Rs in the schematics below. Laboratory sources ...

The simplest model of a battery comprises an ideal voltage source that connects in series with a resistance whose value—often a few milliohms—depends on the battery’s electrochemical condition and ...

The simplified form, in which the input voltage IN is generated with an ideal voltage source, is shown here. Because no internal resistance is defined for the voltage source and no parasitic values ...

The importance of the input-voltage range in power-supply design. Using simulation to ensure the switching regulator is operating properly. A power supply’s source, in actual use, is never ideal ...

The output voltage, Vout, is supposed to act as the output terminal of an ideal voltage source. In other-words, the voltage between Vout and ground will always be equal to A(V in+ and V in-).

We routinely ignore things like wire resistance and source resistance in batteries. Diodes have problems that are harder to ignore, such as the forward voltage drop.

The input operating voltage range of the AOZ1390DI is between 3.3V and 23V, and both VIN and VOUT terminals are rated at 30V Absolute Maximum with the capability to support up to 8A switch current.