PCMCIA power switch — 4 channels, 95 mOhm, industrial temp
The TPS2204APWPR: Each of the four high-side outputs delivers up to 1 A continuous with a typical on-resistance of 95 mOhm, keeping conduction loss low enough that the 24-HTSSOP exposed-pad package can shed the heat without forced airflow.
95 mOhm Rds(on) — thermal budget for 1 A per slot
At 1 A per channel the I²R loss is under 95 mW per output. The 3:4 input-to-output ratio means the three supply rails (3.3 V, 5 V, 12 V) are mapped across the four outputs via the serial interface, so a single part can serve two dual-slot controllers or one four-slot array with shared VCC and VPP rails.
Obsolete — plan the last-time-buy or cross now
Fault protection and the Status Flag output
Fixed current limiting and over-temperature shutdown protect the switch and the downstream card against shorted loads or excessive ambient heat. The open-drain Status Flag asserts low when a fault is detected — a pull-up resistor to the host's logic rail lets the system controller poll the flag and shut down the slot before the thermal cycle damages the connector.