Texas Instruments TPS2206ADB

Overview

TPS2206ADB from Texas Instruments is a dual-slot PC CardBus™ power-interface switch providing integrated 3.3-V, 5-V, and 12-V switching for two PC Card sockets. It features break-before-make switching, thermal shutdown at 135°C, short-circuit current limiting (1–2 A on xVCC, 120–300 mA on xVPP), and 95-mΩ rDS(on) for 5-V VCC outputs. Used in notebook computers and PDAs for controlled card power delivery.

For engineers reviewing the TPS2206ADB datasheet, TPS2206ADB pinout, TPS2206ADB application, or TPS2206ADB equivalent, key selection criteria include dual-slot VCC/VPP switching capability, independent 3.3/5/12-V rail control, thermal and overcurrent protection behavior, and compatibility with CardBus controller serial interface (P2C 3-lead).

Technical Context

The TPS2206ADB implements two independent high-side MOSFET switch banks-one for AVCC/AVPP and one for BVCC/BVPP-each supporting 3.3 V, 5 V, and 12 V inputs with separate current limiting and discharge paths. Its P2C-compatible 3-wire serial interface (CLOCK, DATA, LATCH) enables configuration of individual slot power states without requiring dedicated microcontroller GPIOs.

UVLO circuitry enforces strict input-voltage sequencing: 3.3-V rail must be ≥2.7 V to enable any switch; 5-V and 12-V rails activate only when their respective inputs exceed 2.5 V and 7 V. All outputs enter high-impedance state during UVLO or SHDN assertion, and OC reporting provides open-drain fault signaling with external pullup.

Key Specifications

Pinout & Package

TPS2206ADB uses a 30-pin SSOP (DB) package with exposed thermal pad, rated for 328.58 mW at TA = 70°C and 164.29 mW at TA = 85°C on JEDEC low-k board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2206ADAP, the TPS2206ADB offers lower thermal performance but fits legacy SSOP footprints; versus TPS2204APWP, it adds full dual-slot control at the cost of pin count and layout complexity-critical for notebook OEMs needing backward-compatible dual-socket support.

Availability

TPS2206ADB is available at Aetrix Electronics and suitable for notebook computers, set-top boxes, and digital cameras requiring stable component supply across long-life industrial and consumer programs.

Supply support for TPS2206ADB 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 company specializing in analog, embedded processing, and connectivity technologies.

The TPS2206A product line delivers fully integrated PC CardBus power-switching solutions designed specifically for dual-slot portable computing platforms compliant with PCMCIA standards.

FAQ

What is the maximum continuous output current supported by TPS2206ADB on its xVCC outputs?

The TPS2206ADB supports up to 1 A continuous output current on each xVCC output at TJ = 100°C, with typical short-circuit current limiting between 1 A and 2 A. This rating satisfies the PC Card specification's peak and average current requirements for dual-slot operation while maintaining thermal safety margins under worst-case ambient conditions.

Does TPS2206ADB require external components for overcurrent detection or thermal protection?

No, the TPS2206ADB integrates all overcurrent sensing and thermal shutdown circuitry internally. Each xVCC and xVPP output has dedicated sense FETs and current-limit comparators; thermal shutdown activates at 135°C with 10°C hysteresis. Only an external pullup resistor on the OC pin is required for fault reporting-no external fuses, sense resistors, or thermal sensors are needed for basic protection.

How does the UVLO function behave on the 3.3-V input of TPS2206ADB?

The TPS2206ADB's UVLO circuit monitors the 3.3-V input (pin 15–17) and holds all switches in high-impedance state until VI(3.3V) reaches ≥2.7 V, with 100 mV hysteresis. Below 2.4 V, all outputs remain disabled; this ensures robust power sequencing and prevents partial activation during brownout conditions, which is critical for reliable PC Card enumeration.

Can TPS2206ADB be used in single-slot applications, and if so, how is the second slot disabled?

Yes, TPS2206ADB supports single-slot use by configuring the serial interface to disable BVCC/BVPP outputs via the 9-bit command word. Pins 20–23 remain electrically isolated when inactive, and no hardware modification is needed-only software control of the LATCH/CLOCK/DATA lines is required to assert D8 = 1 (SHDN equivalent) for Slot B.

What is the purpose of the NC pins on the TPS2206ADB DB package?

The NC (no connection) pins on the TPS2206ADB DB package-pins 13, 19, and 26–29-are unconnected die bond pads with no internal circuitry. They must remain floating and should not be soldered to ground or any net, as doing so may compromise thermal performance or cause unintended coupling. Their presence accommodates die size and bonding layout commonality across the TPS22xx family.