The TPS2220BPWPR: It integrates a serial interface for control and a status flag output to signal fault conditions like overcurrent or overtemperature. With a typical Rds(on) of 95 mOhm, the conduction loss at 1 A is about 95 mW per channel — manageable in the 24-HTSSOP exposed-pad package if the PCB thermal land is properly designed. The 4:2 input-to-output ratio means four supply inputs are multiplexed to two outputs, a typical architecture for dual-slot PCMCIA controllers.
Package and thermal — the exposed-pad reality
The 0.65 mm pitch is standard for TSSOP, but the exposed pad adds a paste step that pick-and-place lines handle routinely. Surface-mount assembly is straightforward for this package. The exposed pad improves thermal performance for the 1 A per channel operation.