Texas Instruments TPS2206IDB

Overview

TPS2206IDB from Texas Instruments is a dual-slot PC Card power-interface switch IC that integrates VCC and Vpp switching, current limiting, thermal protection, and serial P2C interface logic in a single LinBiCMOS device. It delivers 3.3-V/5-V/12-V switched outputs to two PC Cards with 110-mΩ (3.3-V VCC), 140-mΩ (5-V VCC), and 1-Ω (12-V Vpp) on-resistance, supporting break-before-make sequencing and 1-A continuous VCC load per slot. It enables notebook and PDA systems requiring compliant, fuseless PCMCIA power management.

For engineers reviewing the TPS2206IDB datasheet, TPS2206IDB pinout, TPS2206IDB application, or TPS2206IDB equivalent, key selection criteria include its 30-pin SSOP (DB) package, dual independent card power control, 3.3-V low-voltage mode operation without 5-V bias, integrated overcurrent reporting via OC pin, and backward compatibility with TPS2202/TPS2202A (excluding VDD and PWROK pins).

Technical Context

The TPS2206IDB implements a P2C 3-wire serial interface (DATA/CLOCK/LATCH) for configuration and control of two independent card power domains-each with separate AVCC/AVPP and BVCC/BVPP outputs. Its internal charge pump eliminates dependency on external 12-V supply for gate drive, enabling 12-V Vpp switching only during flash programming while operating from 3.3-V or 5-V inputs alone.

It features dual-mode reset (active-high RESET on Pin 6 or active-low RESET on Pin 14), thermal shutdown at TJ ≥ 150°C, and current-limited outputs with automatic foldback under short-circuit conditions. Output sequencing follows strict break-before-make timing to prevent cross-conduction between voltage rails.

Key Specifications

Pinout & Package

TPS2206IDB uses a 30-pin SSOP (DB) package with 0.65-mm lead pitch and exposed thermal pad (no backplane). Pin functions are defined per DB top-view layout in SLVS138D Rev. January 2001.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2202IDB, the TPS2206IDB eliminates VDD dependency and adds 3.3-V-only operation, while TPS2206IDAPR offers identical functionality in a thermally superior package - making TPS2206IDB optimal for cost-sensitive, space-constrained 3.3-V-centric designs.

Availability

TPS2206IDB is available at Aetrix Electronics and suitable for notebook computers, PDAs, digital cameras and barcode scanners requiring stable component supply, long-term lifecycle support, and PCMCIA-compliant power sequencing.

Supply support for TPS2206IDB 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 for industrial, automotive, and computing markets.

The TPS2206IDB belongs to TI's PC Card interface power-switch family, engineered specifically to replace discrete MOSFET/fuse solutions in portable computing platforms while meeting PCMCIA 2.1 and CardBus standards.

FAQ

What is the maximum continuous output current per VCC channel on the TPS2206IDB?

The TPS2206IDB supports up to 1 A continuous output current per xVCC channel (AVCC and BVCC) across the full −40°C to +85°C operating temperature range. This rating is validated for both 3.3-V and 5-V VCC operation, with voltage drop held within PCMCIA regulation limits (≤200 mV at 1 A for 3.3-V mode, ≤250 mV for 5-V mode) due to its 110-mΩ and 140-mΩ typical rDS(on), respectively. The TPS2206IDB datasheet confirms this in Section 6 "Recommended Operating Conditions" and Figure 25–27.

Does the TPS2206IDB require an external 12-V supply to operate?

No, the TPS2206IDB does not require an external 12-V supply for basic operation. Its internal charge pump generates necessary gate-drive voltages from either the 3.3-V or 5-V input rails, allowing full 3.3-V/5-V VCC switching without 12-V present. The 12-V input (Pins 7 and 24) is only needed during flash-memory programming to deliver 12-V Vpp to cards - otherwise it may be left unconnected or disabled. This feature is explicitly documented in the "12-V supply not required" section of the SLVS138D datasheet.

How does the TPS2206IDB handle overcurrent conditions, and what role does the OC pin play?

Upon detecting overcurrent, the TPS2206IDB activates internal current limiting to fold back output current and prevent damage, while simultaneously pulling the OC (Overcurrent) pin low. This open-drain signal alerts the host microcontroller to initiate diagnostics or user warnings. If the fault persists and junction temperature exceeds 150°C, thermal shutdown disables all outputs until cooling occurs. The OC pin behavior and current-limit thresholds (1 A for xVCC, 150 mA for xVPP) are specified in Sections 5 and 6 of the TPS2206IDB datasheet.

Can the TPS2206IDB be used in systems that only provide 3.3-V power?

Yes, the TPS2206IDB supports full 3.3-V-only operation (VI(5V) = 0), known as "3.3-V low-voltage mode". In this mode, bias current is derived solely from the 3.3-V input (Pins 15–17), and only 3.3-V VCC and 0/3.3-V Vpp outputs are enabled. The device maintains break-before-make sequencing and OC reporting, making it suitable for battery-powered sleep/pager modes. This capability is detailed in the "backward compatibility and 3.3-V low-voltage mode" subsection of the SLVS138D application information.

What is the purpose of the dual RESET inputs (Pins 6 and 14) on the TPS2206IDB?

The TPS2206IDB provides two mutually exclusive RESET inputs: Pin 6 (active-high) and Pin 14 (active-low), allowing system designers to match host controller logic polarity without level-shifting. Either pin can be used to synchronize PC Card initialization with host platform reset - grounding the selected pin discharges AVCC/AVPP/BVCC/BVPP outputs to zero volts, clearing residual card voltage. The datasheet cautions that only one RESET pin should be connected; the other must remain unconnected to avoid conflict.