Texas Instruments TPS2206IDFR

Overview

TPS2206IDFR from Texas Instruments is a dual-slot PC Card power-interface switch IC that integrates VCC and Vpp switching for 3.3-V, 5-V, and 12-V card power distribution using the P2C serial interface. It delivers 1 A continuous at 3.3 V and 1 A at 5 V with low rDS(on) (110 mΩ for 3.3-V VCC, 140 mΩ for 5-V VCC), break-before-make switching, and built-in short-circuit/thermal protection. It enables compliant power management in notebook computers and PDAs.

For engineers reviewing the TPS2206IDFR datasheet, TPS2206IDFR pinout, TPS2206IDFR application, or TPS2206IDFR equivalent, key selection criteria include its dual-card 3.3/5/12-V switching capability, 3.3-V-only low-voltage mode operation, integrated overcurrent reporting via OC pin, RESET support for concurrent system-card initialization, and compatibility with CardBus controllers.

Technical Context

The TPS2206IDFR implements two independent switched power rails per slot (AVCC/BVCC for VCC; AVPP/BVPP for Vpp), each controlled via a 3-wire P2C serial interface (DATA/CLOCK/LATCH). Its LinBiCMOS process enables internal charge-pump gate drive - eliminating need for external 12-V bias except during flash programming.

It features dual active-low/high RESET inputs (pins 6 and 14), logic-level OC fault reporting, and thermal shutdown that disables all outputs until junction temperature falls below safe threshold. Switching is break-before-make to prevent cross-conduction between voltage domains.

Key Specifications

Pinout & Package

TPS2206IDFR is packaged in a 32-pin TSSOP (DAP) with exposed thermal pad. Pin functions are defined per the DAP top-view diagram 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, TPS2206IDFR enables lower-power 3.3-V-only operation and removes redundant power-good pins, simplifying layout; versus TPS2206IDAPR, TPS2206IDFR shares identical silicon and performance - differing only in packaging logistics.

Availability

TPS2206IDFR is available at Aetrix Electronics and suitable for notebook computers, PDAs, digital cameras and bar-code scanners requiring stable component supply across extended product lifecycles.

Supply support for TPS2206IDFR 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 focused on analog and embedded processing technologies, with leadership in power management and interface solutions.

The TPS2206 product line was designed specifically for PC Card and CardBus power interface applications, delivering integrated, standards-compliant switching with protection and serial control in a single IC.

FAQ

What is the primary function of the TPS2206IDFR in a PC Card system?

The TPS2206IDFR serves as a dual-slot PC Card power-interface switch IC that manages VCC and Vpp power delivery for two independent PC Cards. It integrates MOSFET switches, serial control logic, current limiting, and thermal protection to replace discrete power components while ensuring compliance with PCMCIA and CardBus standards. The TPS2206IDFR enables precise voltage selection (3.3 V, 5 V, 12 V), break-before-make switching, and fault reporting - all critical for reliable hot-plug operation.

Does the TPS2206IDFR support operation with only a 3.3-V supply?

Yes, the TPS2206IDFR supports full functionality in 3.3-V low-voltage mode when VI(5V) = 0. In this mode, bias current is derived solely from the 3.3-V input pins, and the device delivers up to 1 A at 3.3 V to each card's VCC rail. The 3.3-V switch rDS(on) increases slightly (up to 180 mΩ), but remains within PCMCIA regulation limits for typical loads. This capability enables use in sleep-mode and pager-mode systems where only 3.3 V is available.

How does the TPS2206IDFR handle overcurrent conditions?

The TPS2206IDFR uses internal sense FETs to monitor each VCC and Vpp output. Upon detecting overcurrent, it linearly limits output current rather than shutting down immediately - preventing voltage collapse and allowing graceful host response. Simultaneously, it asserts the OC pin (open-drain, active-low) to signal the host microprocessor. If the condition persists and junction temperature exceeds 150°C, thermal protection disables all outputs until cooling occurs. This dual-stage approach avoids fuse replacement and supports diagnostic logging in the TPS2206IDFR.

What is the role of the OC pin on the TPS2206IDFR?

OC (Overcurrent) is an open-drain output pin on the TPS2206IDFR that goes low whenever any VCC or Vpp output enters current-limit mode. It provides real-time fault indication to the host controller, enabling firmware to log events, trigger UI alerts, or initiate safe shutdown sequences before thermal shutdown activates. Unlike a simple interrupt, OC remains asserted as long as overcurrent persists, giving the host time to respond - a critical feature for maintaining system reliability in the TPS2206IDFR.

Can the TPS2206IDFR replace the TPS2202IDB without board changes?

No - the TPS2206IDFR is not a pin-compatible replacement for the TPS2202IDB. While functionally similar, the TPS2206IDFR omits the VDD pin (pin 25 on TPS2202IDB) and removes APWR_GOOD/BPWR_GOOD outputs. Its pinout differs across 30-pin (DB) vs. 32-pin (DAP) packages. Board-level redesign is required to accommodate the TPS2206IDFR's different pin count, missing VDD connection, and relocated RESET/OC signals - though logic-level compatibility allows reuse of P2C interface firmware.