PCMCIA power switch — four channels, 1 A each, 97 mOhm on-resistance
The 3:4 input-to-output ratio allows a single control signal to sequence power to four independent socket pins, matching the PCMCIA standard's VCC and VPP rail requirements.
Fault protection and interface — fixed current limit, over-temperature, serial control
Built-in fault protection includes fixed current limiting and over-temperature shutdown, which guard the switch and downstream PCMCIA card against short circuits and thermal runaway. The switch is controlled via a serial interface and provides a status flag output to the host controller for fault reporting. No external Vcc/Vdd supply is required for the control logic — the switch is self-powered from the load rail.
Package and temperature grade — 30-SSOP, industrial range
The supplier device package is 30-SSOP.
Lifecycle status — obsolete, no direct replacement listed
The TPS2228DB is classified as obsolete by the manufacturer. No official successor or cross-reference part number is recorded in the lifecycle data.