Dear Sirs, good night
Looking to add a power switch for an application.
It will receive power from a wall adapter (5V) or from 3x AA Cells.
The TPS2120 seems a good candidate but I would like to be sure if it is protected against reverse battery polarity.
Is there another alternative to this chip?
Thanks!
Hello Javier,
You can actually have the device protect against reverse polarity conditions by simply adding a diode on the ground network as such:
See the 10.6 Reverse Polarity Protection with TPS212x section in the datasheet. Other than that if you need even more protection a good way to do this would be to place an ideal diode such as an LM74700 on the input rails for input protection.
