PCMCIA power switch — four outputs, three voltage rails
The Texas Instruments TPS2206ADAP is a high-side PCMCIA/CardBus power switch IC that routes one of three load voltages (3.3 V, 5 V, or 12 V) to four independent outputs, each rated for 1 A maximum. It integrates serial interface control, a status flag output, and fixed current limiting plus over-temperature protection — the standard fault envelope for hot-swap PCMCIA slots in industrial and telecom equipment. The 3:4 input-to-output ratio means the three supply rails are multiplexed across the four outputs, typically pairing VCC and VPP for two independent card slots.
Obsolete — sourcing reality and lifecycle status
Sourcing is limited to surplus inventory, broker channels, or last-time-buy stock held by distributors. Availability and pricing are confirmed per RFQ. No official replacement or pin-compatible successor is listed in the manufacturer's documentation. Any substitution requires a full hardware and software qualification.
The 95 mOhm typical Rds(on) sets the conduction loss per output — at 1 A, each switch dissipates roughly 95 mW, which the 32-HTSSOP exposed pad can sink with proper PCB thermal design. No separate Vcc/Vdd supply is required — the IC draws power directly from the load rails, eliminating a dedicated regulator.