IC for power supply source selector switch needed

[UHF]

Hello, I don't know the name of this type of IC. I want to have two power supply sources at 5VDC 500mA. One source is internal (USB) and the other external from a power adapter. I want the internal to be cut off and the external to supply power when applied (5V detected from it perhaps.) Is there a name for this type of IC like a power selector? I can find battery backup ICs but not this type. I considered a barrel connector with a switch - this kind of thing https://www.edaboard.com/attachments/dcjack-png.168949/ but it cuts off ground not 5V and I don't want centre-pin negative nonsense. Thanks.

[mariush]

There's ideal diode controllers like LM66200 which automatically switch between 2 sources, giving priority to the highest voltage : https://www.ti.com/lit/ds/symlink/lm66200.pdf
You could add a diode in series with the internal voltage and that would lower it the internal voltage a bit below 5v, so when you insert the external 5v it would switch to that.

You can use a single ideal diodes like LM66100 and a p-channel mosfet to auto switch, without using a diode , see page 12 : https://www.ti.com/lit/ds/symlink/lm66100.pdf

MAX40200 is another ideal diode : https://www.analog.com/media/en/technical-documentation/data-sheets/MAX40200.pdf
Could use it similarly ... have it on internal 5v with a diode before it to reduce the voltage a bit so that when you put external 5v the ideal diode will block lower internal voltage, or you could use it on external input along with a p-channel mosfet to disable internal voltage.

There are also chips that can switch between multiple inputs automatically but typically have limitations or are more expensive .

Look for example at TPS211, TPS2110, TPS2114, TPS2115 :
TPS2110/TPS2111 : https://www.ti.com/lit/ds/symlink/tps2110a.pdf
TPS2114/TPS2115  : https://www.ti.com/lit/ds/symlink/tps2114a.pdf

2115 is $2.65 if you buy just one on Digikey, while a LM66100 is maybe 40 cents and a p-channel mosfet is maybe 10-20 cents.

tps2113 is around $2 https://www.ti.com/lit/ds/symlink/tps2113a.pdf

FPF3040 is cheaper at around 1.2$ on Digikey and does the same job but higher pin count chip and harder to use (bga balls) : https://www.onsemi.com/pdf/datasheet/fpf3040-d.pdf

 

Cheaper stuff, for example TPS22933 has 3 inputs and a built in 3.6v linear regulator and automatically switches between the input with the highest voltage. Downside is the output is maximum 50mA

[UHF]

Thanks very much. They seem to be called Source Selector Switches / OR controllers.  TPS2110A looks about right, a bit expensive but I'm not making many of these. Thanks.