PCMCIA power switch with four independent channels
The Texas Instruments TPS2223APWP is a PCMCIA power-distribution switch delivering four high-side outputs, each rated for 1 A continuous. A serial interface controls the output sequencing, and the 3:4 input-to-output ratio lets one supply rail feed three of the four outputs — useful for dual-slot PCMCIA designs where one slot powers both VCC and VPP.
Thermal and protection features in a compact footprint
The 24-HTSSOP package with exposed pad pulls heat from the die into the PCB copper plane — important when all four outputs are loaded near 1 A simultaneously. The fixed current-limiting and over-temperature shutdown protect the switch and the card slot from fault conditions. No separate Vcc/Vdd supply is required; the switch draws its bias from the load rail. The status flag output (open-drain) signals over-current or thermal events to the host controller.
The base product number TPS2223 covers the family; verify the suffix for the specific package and temperature grade when ordering.