High side load switch 1 pmos

High side is the wrong description for this circuit. Its just a common source for a PMos. It would be a high side if its a NMos and would need an voltage above the 14V to drive the NMos and is then called high side. In this case everything is normal like for an NMos its a common source topology. I have cleaned your circuit a little check this http://everycircuit.com/circuit/4972195840000000

Hurz does not understand about high side and low side switching. Here is a brief explanation: 1) The switch we are referring to in these matters is the Mosfet as the switch, not the SPST. ... 2) If that Mosfet switch, which is turning the Load on/off is on the +ve side (nearest the battery) with the load thus on a lower side nearer earth, then that Mosfet is a 'high side switch' for that Load. That is the case in the schematic here above with the 100 Ohm Load and the Source of 14v at top left. ... If the Mosfet switch which is turning the Load on/off is nearer the earth, (ie: thus with the Load nearer the battery supply), then that Mosfet is a 'Low Side Switch'. The hurz link is fine, (as would be using that SPST and 47k resistor swapped places), but that Mosfet is still acting as a 'High Side Switch' there. Usually a Pmos, as used here is easier to set up as a 'High Side Switch', but a Nmos can be used instead, if a driver etc is implemented to obtain the necessary switching voltages.

Side issue ... In ordinary house wiring, all switches, by law must be on the high side of the load, (Mosfets do not enter the scenario ... eg: if a mosfet is part of a switch, then the whole switch must be on the high side of any mains load / possible load socket etc).

And again, this topology is not a high side one. Its a simple common source topology, as @2cent is a noob he still dont know the basic operating topologies. High side it would be called in case you use an NMos instead of PMos, then you would need a higher voltage then the supply to drive the NMos high side. But @2cent is a looser and knows everything better even he knows nothing. Well done @2cent you are on the way to create a new naming for something which is already known, but as stubborn you are we know you will fight for this error till end of your days. Lol "simple common source" please remember "common source" just simple

Any switch which operates on the high side of its load is a "high side switch". ... A ready made integrated driver is just one option of being able to switch at the high side of a load.

And because you Mr @2cent invented a new wording the hole world must follow your idea. Its a nice idea, unfortunately there is the real "high side" topology which must be separated from this common source PMos, which it is called correctly. Just you think it makes sense and you think you have learned something new it not by default correct. In this case its just wrong.

Shops etc sell a range of "high side switches" with built in drivers so that relatively high voltage loads can be switched from a low voltage user end starting point. A straight Pmos could be bought and used instead, as the "high side switch" if we prefer, without the driver benefits. The schematic above is a case where such a Pmos setup is being used as the "high side switch" where no high voltage is of concern.