The Texas Instruments TPS2204APWP is a PCMCIA power-interface switch designed to sequence and distribute 3.3 V, 5 V, and 12 V supply rails to a PC Card slot. It integrates four high-side outputs with a 3:4 input-to-output ratio, each rated for 1 A continuous current, and a typical on-resistance of 95 mOhm per channel. A serial interface controls the output configuration, and the device includes a status-flag output for fault reporting. Fixed current limiting and over-temperature protection guard the slot and the host supply against short-circuit and thermal overload events.
95 mOhm Rds(on) — what it means for slot power delivery
At 1 A per output, the 95 mOhm typical on-resistance produces about 95 mW of conduction loss per channel.
Package and footprint notes for the assembly line
The exposed paddle is electrically connected to the substrate ground — the layout must tie it to the ground plane with low impedance.