Texas Instruments TPS2224PWP

Overview

TPS2224PWP from Texas Instruments is a dual-slot CardBus power-interface switch providing fully integrated 3.3 V, 5 V, and 12 V switching for PC Card sockets. It delivers independent VCC/VPP control per slot, features break-before-make switching, thermal and short-circuit protection, and operates across −40°C to 85°C ambient. Used in notebook computers and PDAs for compliant hot-swap power management.

For engineers reviewing the TPS2224PWP datasheet, TPS2224PWP pinout, TPS2224PWP application, or TPS2224PWP equivalent, key selection considerations include its 24-pin HTSSOP (PWP) package, 110 mΩ typical rDS(on) on 3.3 V → xVCC paths, 1 A current limit on xVCC outputs, 100 mA limit on 12 V → xVPP, and support for serial interface control with LATCH/CLOCK/DATA inputs.

Technical Context

The TPS2224PWP implements dual-channel power switching with separate AVCC/AVPP and BVCC/BVPP outputs for two PC Card slots. Each channel supports independent enable via serial command or direct SHDN/RESET logic, with UVLO monitoring on 3.3 V, 5 V, and 12 V inputs.

It integrates current-limit sensing (reported via open-drain OC pin), thermal shutdown at 135°C with 10°C hysteresis, and output discharge resistors (0.7 kΩ typical at xVCC, 0.4 kΩ at xVPP) to safely discharge card capacitance during disable. Power-on reset ensures all switches start in high-impedance state.

Key Specifications

Pinout & Package

TPS2224PWP is housed in a 24-pin PowerPAD™ HTSSOP (PWP) package with exposed thermal pad for enhanced heat dissipation-rated at 3322 mW at TA ≤ 25°C and 1329 mW at TA = 85°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CardBus power interface applications.

Compared with TPS2223PWP and TPS2226DB, the TPS2224PWP uniquely balances 12 V Vpp support, 24-pin compactness, and dual-slot independence-making it optimal for mainstream portable hosts where space, cost, and full PC Card voltage coverage are jointly constrained.

Availability

TPS2224PWP is available at Aetrix Electronics and suitable for notebook computers, bar code scanners, and digital cameras requiring stable component supply with long-term lifecycle assurance.

Supply support for TPS2224PWP 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.

The TPS222x family was designed specifically for PC Card and CardBus host systems, delivering integrated, standards-compliant power switching with built-in protection and serial configurability.

FAQ

What is the maximum continuous output current supported by the TPS2224PWP on its xVPP outputs?

The TPS2224PWP supports up to 100 mA continuous output current on each xVPP output (AVPP and BVPP) when powered from the 12 V input. This rating is specified at TJ = 100°C and aligns with PC Card flash-memory programming requirements. The device limits short-circuit current to 120–300 mA depending on junction temperature, ensuring safe operation during faults without external current-limiting components.

Does the TPS2224PWP support independent control of VCC and VPP for each card slot?

Yes, the TPS2224PWP provides fully independent control of VCC and VPP for both Slot A (AVCC/AVPP) and Slot B (BVCC/BVPP). Control is achieved either through the 3-wire serial interface (DATA/CLOCK/LATCH) or via dedicated logic inputs including SHDN and RESET. This independence allows, for example, applying 12 V to AVPP while keeping BVPP at 3.3 V-critical for mixed-card environments.

What package type is used for the TPS2224PWP, and how does its thermal performance compare to the DB variant?

The TPS2224PWP uses a 24-pin PowerPAD™ HTSSOP (PWP) package. Its thermal performance significantly exceeds the 24-pin SSOP (DB) variant: at TA = 25°C, PWP supports 3322 mW versus DB's 890 mW; at TA = 85°C, PWP delivers 1329 mW versus DB's 356 mW. This makes the PWP variant preferred for thermally constrained portable designs.

How does the TPS2224PWP handle overcurrent events, and what signal indicates fault detection?

The TPS2224PWP detects overcurrent via internal current-sense circuitry and asserts an open-drain OC (overcurrent) signal that pulls low within 3 µs for xVPP faults and 10 µs for xVCC faults. An external pullup resistor is required on the OC pin to interface with host microcontrollers. After fault clearance, the device auto-resumes normal operation-no reset pulse is needed.

Is the TPS2224PWP pin-compatible with other devices in the TPS222x family?

Yes, the TPS2224PWP shares identical pinout and footprint with the TPS2223PWP in the 24-pin PWP package. Both devices are pin-compatible and functionally interchangeable except for 12 V support: TPS2224PWP enables 12 V on pins 7 and 20 for xVPP, while TPS2223PWP leaves those pins as NC. This allows drop-in replacement where 12 V capability is added later.