Texas Instruments TPS2223ADB

Overview

TPS2223ADB 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 TTL-compatible serial control (CLOCK/DATA/LATCH), provides 1 A steady-state current per xVCC output, and operates across –40°C to 85°C ambient.

For engineers reviewing the TPS2223ADB datasheet, TPS2223ADB pinout, TPS2223ADB application, or TPS2223ADB equivalent, this device is selected for PC Card socket power management where dual-slot support, fast overcurrent response (<10 µs), and integrated discharge paths are required - especially in legacy notebook, set-top box, and PDA designs compliant with PC Card Standard Rev. 7.0.

Technical Context

The TPS2223ADB implements two independent high-side NMOS power switches per slot (AVCC/BVCC for 3.3 V/5 V; AVPP/BVPP for 5 V only), each with programmable current limiting, internal UVLO on 3.3 V and 5 V inputs, and power-on reset logic. Its serial interface uses edge-triggered LATCH and positive-edge CLOCK to load 11-bit configuration words defining voltage selection, enable states, and discharge control.

Unlike TPS2224A/TPS2226A, the TPS2223ADB omits 12 V support entirely: pins 7 and 20 are NC, and no 12 V-to-xVPP switching capability exists. All outputs feature internal discharge resistors (0.5–0.7 kΩ at xVCC, 0.2–0.4 kΩ at xVPP) and open-drain OC reporting with external pullup.

Key Specifications

Pinout & Package

TPS2223ADB is housed in a 24-pin HTSSOP (DB) package with exposed thermal pad, optimized for surface-mount assembly and thermal dissipation on standard FR-4 PCBs. Pin 1 is located at the top-left corner adjacent to the index mark.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2224ADB and TPS2226APWP, the TPS2223ADB offers lowest component count and cost for 3.3 V/5 V-only dual-slot systems, with identical timing, protection, and control architecture - eliminating unused 12 V circuitry and associated layout overhead.

Availability

TPS2223ADB is available at Aetrix Electronics and suitable for notebook computer motherboard designs, set-top box expansion interfaces, and industrial PDA docking stations requiring stable component supply and long-term lifecycle support.

Supply support for TPS2223ADB 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 connectivity technologies, with decades of experience in power management ICs for computing and communications infrastructure.

The TPS222x family was designed specifically for PCMCIA/CardBus host controller power management - delivering integrated, standards-compliant switching, protection, and serial configurability in a single IC for space-constrained portable systems.

FAQ

What is the maximum continuous output current per channel for TPS2223ADB?

The TPS2223ADB supports 1 A steady-state current per xVCC output (AVCC and BVCC) at TJ = 100°C, as specified in the Electrical Characteristics table under IOS(xVCC). This rating satisfies PC Card Standard peak current requirements for dual-slot operation without external current limiting.

Does TPS2223ADB support 12 V switching on its AVPP and BVPP outputs?

No. The TPS2223ADB does not support 12 V switching: pins 7 and 20 are explicitly marked "NC" (no internal connection) in the datasheet, and the functional block diagram confirms absence of 12 V paths. Only 5 V and Hi-Z are available on AVPP and BVPP outputs.

How does the OC (overcurrent) pin function on TPS2223ADB?

The OC pin on TPS2223ADB is an open-drain output that pulls low during any overcurrent event on AVCC, BVCC, AVPP, or BVPP channels. It requires an external pullup resistor (typically 10 kΩ to 3.3 V) and asserts within <10 µs of fault detection - enabling immediate host MCU interrupt-driven response.

What is the purpose of the 3.3V input pins (13 and 14) on TPS2223ADB?

Pins 13 and 14 supply 3.3 V to power the internal logic, serial interface, and gate drivers of the TPS2223ADB. This supply is mandatory - the device will not operate without it - and also serves as the reference for UVLO monitoring and POR generation per the datasheet's Recommended Operating Conditions.

Can TPS2223ADB be used in place of TPS2220ADB for single-slot applications?

Yes, the TPS2223ADB is pin-compatible and functionally backward-compatible with the TPS2220A for single-slot use: all control signals, power inputs, and outputs map identically, and unused BVCC/BVPP channels default to Hi-Z. However, TPS2220A remains preferred for cost-sensitive single-slot designs due to lower unit price.