Obsolete — sourcing path for the TPS2221PWPG4
PCMCIA power switch — dual-slot control
The TPS2221PWPG4 is a dual high-side PCMCIA power switch from Texas Instruments. The switch integrates current limiting and over-temperature fault protection, and includes a status flag output for fault reporting.
97 mOhm Rds(on) — thermal budget for the slot
With a typical on-resistance of 97 mOhm per output, the TPS2221PWPG4 dissipates about 97 mW at the 1 A maximum continuous current.
14-HTSSOP package — layout notes
The pad must be connected to the ground plane with multiple vias under the package for effective heat spreading. The parallel interface uses a 3:2 input-to-output ratio — three control lines manage two outputs.