Source selector switch for dual-supply power paths
The Texas Instruments TPS2113PWRG4 is a source selector switch — essentially a power multiplexer that lets a design pick between two input supplies and route one to the output. It integrates an N-Channel FET switch internally, so no external pass transistor is needed. The 2:1 input ratio means it handles two source rails and delivers one to the load. The 1.25 A maximum continuous output covers a USB peripheral port, a sensor cluster, or a small radio module.
Parametric fit — timing, current, and temperature
Turn-on delay is 1 ms typical, turn-off delay 5 ms typical. These are not fast-switching numbers — the part is designed for steady-state source selection, not hot-swap or load-break applications.
TI lists the TPS2113PWRG4 as Obsolete. No stock-holding claim, no lead-time number — the quote is the real picture.