Texas Instruments TPS2223PWPR

Overview

TPS2223PWPR from Texas Instruments is a dual-slot PC Card power-interface switch IC designed for controlled 3.3 V and 5 V distribution to CardBus sockets. It integrates independent VCC/VPP switching, break-before-make logic, thermal shutdown (135°C trip), short-circuit protection (1 A xVCC / 200 mA xVPP), and 140-µA typical quiescent current. Used in notebook computers and digital cameras for compliant PCMCIA power management.

For engineers reviewing the TPS2223PWPR datasheet, TPS2223PWPR pinout, TPS2223PWPR application, or TPS2223PWPR equivalent, key selection criteria include its 24-pin HTSSOP (PWP) package, absence of 12-V support, dual-channel current limiting, open-drain OC reporting, and compatibility with PC Card Standard voltage regulation requirements.

Technical Context

The TPS2223PWPR implements two independent switched power rails per slot: AVCC/BVCC (3.3 V/5 V outputs) and AVPP/BVPP (3.3 V/5 V only - no 12 V). Its control logic accepts serial interface commands (DATA/CLOCK/LATCH) and asynchronous SHDN/RESET inputs, enabling precise sequencing and fault isolation. Power-on reset (POR) and undervoltage lockout (UVLO) on 3.3 V input ensure safe startup.

Each output channel features internal current limiting (1 A for xVCC, 200 mA for xVPP), thermal shutdown with 10°C hysteresis, and integrated discharge paths (0.7 kΩ xVCC / 0.4 kΩ xVPP). The device operates across −40°C to 85°C ambient and supports break-before-make switching to prevent bus contention during rail transitions.

Key Specifications

Pinout & Package

TPS2223PWPR is packaged in a 24-pin PowerPAD™ Plastic Small Outline (PWP) package with exposed thermal pad, optimized for high-power dissipation (3322 mW at 25°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2223PWP, TPS2223PWPR offers identical performance in tape-and-reel form for production scalability; versus TPS2214DB, it trades parallel pin count for serial configurability and smaller PWP footprint - critical for compact mobile hosts.

Availability

TPS2223PWPR is available at Aetrix Electronics and suitable for notebook computers, digital cameras, and bar code scanners requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TPS2223PWPR 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 ICs with broad industrial and computing portfolio coverage.

The TPS222x family targets PC Card and CardBus host systems, delivering integrated, standards-compliant power switching with protection and programmability - reducing design risk in portable and embedded platforms.

FAQ

What is the maximum continuous output current supported by TPS2223PWPR on its xVPP outputs?

The TPS2223PWPR supports up to 200 mA continuous output current on each xVPP output (AVPP and BVPP) at TJ = 100°C, as specified in the recommended operating conditions table. This rating applies to 3.3 V and 5 V outputs only; the device does not support 12 V on xVPP, consistent with its documented exclusion of 12-V functionality. The current limit is internally enforced with fast response (<3 µs) to overcurrent events.

Does TPS2223PWPR support 12-V switching for VPP rails?

No, TPS2223PWPR does not support 12-V switching. The datasheet explicitly states "Optimized for lower power implementation, the TPS2223 does not support 12-V switching to VPP" and confirms pins 7 and 20 are NC for TPS2223. Unlike TPS2226, this variant is designed exclusively for 3.3 V/5 V CardBus applications where 12 V is obsolete or unused.

How does the OC (overcurrent) pin on TPS2223PWPR function, and what external components are required?

The OC pin on TPS2223PWPR is an open-drain output that pulls low during overcurrent or thermal fault conditions. An external pullup resistor (typically 4.7–10 kΩ to VCC) is mandatory to establish a valid logic-high level when no fault is present. The pin asserts within ≤10 µs for xVCC faults and ≤3 µs for xVPP faults, enabling rapid system-level fault handling without additional sensing circuitry.

What is the purpose of the LATCH pin on TPS2223PWPR, and how is it used in the serial interface?

The LATCH pin on TPS2223PWPR serves as the data strobe for the 3-wire serial interface. After clocking 11 bits of command data (D0–D10) into the shift register via DATA and CLOCK, a rising edge on LATCH transfers the data into the control latch, updating output states. The datasheet specifies internal pulldown on LATCH, and timing requires the LATCH edge to occur before the next CLOCK rising edge to avoid corruption.

Can TPS2223PWPR operate with only the 3.3-V supply, or are other inputs required for basic functionality?

TPS2223PWPR requires the 3.3-V supply (pins 13, 14) for all circuit operations - it is mandatory and powers internal logic, control circuitry, and bias networks. The 5-V supply (pins 1, 2, 24) is optional and only needed if 5-V outputs are used. No 12-V input is required or supported. If only 3.3-V outputs are enabled, the 5-V input may be left unconnected, provided UVLO thresholds are respected.