Texas Instruments TPS2223APWP

Overview

TPS2223APWP from Texas Instruments is a dual-slot CardBus™ power-interface switch for PCMCIA host controllers, integrating independent 3.3 V and 5 V switching for two card sockets with break-before-make sequencing, thermal shutdown, and current-limit reporting. It supports AVCC/AVPP and BVCC/BVPP outputs, operates from –40°C to 85°C ambient, and features 140-µA typical quiescent current from the 3.3-V input.

For engineers reviewing the TPS2223APWP datasheet, TPS2223APWP pinout, TPS2223APWP application, or TPS2223APWP equivalent, this device is selected for PC Card socket power management where dual-slot control, fast current-limit response (10 µs), and integrated UVLO/POR are required - especially in legacy notebook, set-top box, and PDA designs compliant with PC Card Standard v7.0.

Technical Context

The TPS2223APWP implements two independent high-side power switches per slot (AVCC/AVPP and BVCC/BVPP), each with programmable enable via serial interface (CLOCK/DATA/LATCH) and asynchronous SHDN/RESET. Its internal current-limit circuitry responds in ≤10 µs to short-circuit faults on xVCC outputs, while thermal shutdown triggers at TJ = 135°C with 10°C hysteresis.

Unlike TPS2224A/TPS2226A, the TPS2223APWP omits 12-V support: pins 7 and 20 are NC, and xVPP outputs are limited to 3.3 V or 5 V only. All logic inputs (CLOCK, DATA, LATCH, RESET, SHDN) are TTL-compatible with VIH ≥ 2 V and VIL ≤ 0.8 V, and OC is an open-drain overcurrent flag requiring external pullup.

Key Specifications

Pinout & Package

TPS2223APWP is housed in a 24-pin HTSSOP (PWP) package with exposed thermal pad, optimized for surface-mount assembly and thermal dissipation in space-constrained PCMCIA host slots.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-slot PC Card power management applications.

Compared with TPS2224APWP and TPS2226APWP, the TPS2223APWP delivers identical dual-slot control, current limiting, and thermal protection in a smaller 24-pin HTSSOP package - making it the most space- and cost-efficient choice for 3.3/5-V-only CardBus applications.

Availability

TPS2223APWP is available at Aetrix Electronics and suitable for notebook computer host designs, set-top box expansion interfaces, and PDA expansion bays requiring stable component supply across long-lifecycle embedded programs.

Supply support for TPS2223APWP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of experience in PC Card and CardBus interface solutions.

The TPS222x family was designed specifically for PCMCIA-compliant host controllers, delivering integrated dual-slot power switching, fault protection, and serial configuration - targeting space-constrained portable and consumer electronics.

FAQ

What is the maximum supported load current per output channel on the TPS2223APWP?

The TPS2223APWP supports up to 750 mA per xVCC output (AVCC/BVCC) at TJ = 100°C, with rDS(on) ≤ 140 mΩ ensuring <120 mV voltage drop. For xVPP outputs (AVPP/BVPP), the steady-state current limit is 100 mA at TJ = 100°C, reflecting its role in powering low-current interface logic rather than primary card power.

Does the TPS2223APWP support 12-V output on its xVPP pins?

No. The TPS2223APWP does not support 12-V output: pins 7 and 20 are explicitly marked "NC" (no internal connection) in the datasheet, and all electrical characteristics for xVPP are specified only for 3.3 V and 5 V operation. This distinguishes it from the TPS2224APWP and TPS2226APWP, which do support 12-V xVPP.

How does the TPS2223APWP handle overcurrent conditions?

The TPS2223APWP uses internal current-sense circuitry to detect overcurrent on any xVCC or xVPP output. When triggered, it limits current to a steady-state value (1 A for xVCC, 100 mA for xVPP), asserts the open-drain OC pin low (requiring external pullup), and maintains regulation until the fault clears or thermal shutdown activates at TJ = 135°C.

What is the function of the LATCH, CLOCK, and DATA pins on the TPS2223APWP?

These pins implement a synchronous 11-bit serial interface: DATA carries the command word, CLOCK clocks each bit on its rising edge, and LATCH (active-high) captures the full 11-bit word into the control register. This allows precise configuration of individual output states, current limits, and discharge behavior without requiring a microcontroller GPIO per channel.

Can the TPS2223APWP operate with only the 3.3-V supply present?

No. While the 3.3-V input (pins 13/14) powers internal logic and is mandatory for all operations, the TPS2223APWP requires either the 5-V input (pins 1/2/24) or both supplies to deliver regulated outputs. The 3.3-V rail alone cannot source xVCC or xVPP - it serves only as bias for control circuitry and gate drivers.