Texas Instruments TPS2223DB

Overview

TPS2223DB from Texas Instruments is a dual-slot PC Card power-interface switch IC designed for notebook and desktop computers. It provides controlled 3.3 V and 5 V distribution to two card sockets, features break-before-make switching, 140-µA typical quiescent current from 3.3-V input, thermal and short-circuit protection, and operates from −40°C to 85°C ambient.

For engineers reviewing the TPS2223DB datasheet, TPS2223DB pinout, TPS2223DB application, or TPS2223DB equivalent, key selection criteria include its 24-pin HTSSOP package, absence of 12-V VPP support, independent VCC/VPP output control per slot, integrated overcurrent reporting via open-drain OC pin, and compliance with PC Card power standards.

Technical Context

The TPS2223DB integrates dual-channel power switching logic with independent control of AVCC/AVPP (Slot A) and BVCC/BVPP (Slot B) outputs. Its internal architecture includes UVLO monitoring on 3.3-V and 5-V inputs, power-on reset (POR), and serial interface (DATA/CLOCK/LATCH) for configuration.

Unlike TPS2224DB and TPS2226DB, the TPS2223DB omits 12-V support entirely-pins 7 and 20 are NC-and delivers only 3.3 V and 5 V to both xVCC and xVPP outputs. Its rDS(on) is optimized for PC Card peak/average current requirements: 85–140 mΩ for 3.3 V→xVCC and 95–160 mΩ for 5 V→xVCC at TJ = 100°C.

Key Specifications

Pinout & Package

TPS2223DB is housed in a 24-pin HTSSOP (PowerPAD) package (DB-24), optimized for thermal dissipation in space-constrained PC Card host designs. Pin 7 and Pin 20 are No Connect (NC) - confirming absence of 12-V functionality.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2224DB and TPS2214DB, the TPS2223DB uniquely balances programmability, low quiescent current, and 12-V exclusion - making it optimal for modern 3.3/5-V-only PC Card hosts where simplicity, thermal efficiency, and serial configurability are prioritized.

Availability

TPS2223DB is available at Aetrix Electronics and suitable for notebook computers, digital cameras, and set-top boxes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for industrial OEM programs.

Supply support for TPS2223DB 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 mobile interface solutions.

The TPS222x family was engineered specifically for PCMCIA-compliant power management in portable computing - delivering integrated switching, protection, and programmability in a single IC to replace discrete power-control circuits.

FAQ

What is the maximum continuous output current supported by TPS2223DB on its xVCC outputs?

The TPS2223DB supports up to 750 mA per xVCC output (AVCC or BVCC) at TJ = 25°C, with current-limit threshold set to 1–2 A for short-circuit protection. At TJ = 100°C, the rDS(on) increases to 110–140 mΩ for 3.3 V→xVCC and 120–160 mΩ for 5 V→xVCC, maintaining safe operation within PC Card average current limits. The TPS2223DB does not support continuous 12-V output.

Does TPS2223DB support 12-V VPP output?

No, the TPS2223DB does not support 12-V VPP output. Pins 7 and 20 are explicitly designated as No Connect (NC) for this device, and the datasheet confirms "TPS2223 does not support 12-V switching to VPP." Only TPS2224DB and TPS2226DB provide 12-V VPP capability. The TPS2223DB delivers only 3.3 V or 5 V to both AVPP and BVPP outputs.

How does the OC pin on TPS2223DB function during an overcurrent event?

The OC pin on TPS2223DB is an open-drain output that pulls low within 10 µs (for xVCC) or 3 µs (for xVPP) after detection of an overcurrent condition. It remains asserted until the fault clears and internal current limiting resets. An external pullup resistor is required to interface with host GPIO or interrupt controllers. This behavior is confirmed in the Electrical Characteristics table and Figure 5 of the TPS2223DB datasheet.

What is the purpose of the DATA, CLOCK, and LATCH pins on TPS2223DB?

The DATA, CLOCK, and LATCH pins implement a 3-wire serial interface for configuring TPS2223DB output states. LATCH strobes the 11-bit command word into internal registers on its rising edge; DATA carries bit values synchronized to CLOCK's rising edge. This interface enables dynamic control of individual AVCC/AVPP/BVCC/BVPP switches, independent VPP/VCC selection per slot, and shutdown/reset sequencing - distinguishing TPS2223DB from fixed-pin alternatives like TPS2214DB.

Is TPS2223DB compatible with the PC Card Standard revision 5.0?

Yes, the TPS2223DB meets the current PC Card Standard requirements for dual-slot power management, including VCC/VPP voltage regulation, sequencing, current limiting, and thermal protection. Its rDS(on), current-limit thresholds, and timing parameters (e.g., break-before-make delay, rise/fall times) are explicitly designed to satisfy PCMCIA-defined peak and average current profiles for 3.3-V and 5-V operation - as stated in the device description and Application Information section of the TPS2223DB datasheet.