Part Number: TPS2121
I am looking for a device that can do the following:
Two inputs - single output
Input A - Lower voltage - a LiPO battery can be from 2.7-4.2V - Primary source
Input B - Higher voltage - DC in from 5-9V - Secondary source
If Input A is present - MUX selects this input
In Input A is absent - MUX selects secondary source
Limitations / conditions:
Input B, the MUX will enforce a 5.5V overvoltage limit.
No reverse current allowed
This is a low current application - ideally would have the ability to set a current limit or at least short protection.
Does something exist that can do this?
Thanks,
Chip