Texas Instruments TPS2205IDFR

Overview

TPS2205IDFR 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. It delivers 1 A continuous at 3.3 V and 1 A at 5 V per slot, features break-before-make switching, 140-mΩ rDS(on) for 5-V VCC paths, and thermal/overcurrent protection. It enables low-power 3.3-V-only operation in notebook sleep mode and supports PCMCIA-compliant hot-swap interfaces.

For engineers reviewing the TPS2205IDFR datasheet, TPS2205IDFR pinout, TPS2205IDFR application, or TPS2205IDFR equivalent, key selection criteria include dual-slot VCC/Vpp switching capability, 3.3-V low-voltage mode without 5-V bias, integrated overcurrent reporting via OC pin, compatibility with TI/Cirrus/Ricoh/O2Micro PCMCIA controllers, and SSOP-30 (DB) package footprint.

Technical Context

The TPS2205IDFR implements two independent, fully integrated power-switching channels-each with separate logic-controlled VCC (3.3 V/5 V) and Vpp (3.3 V/5 V/12 V) outputs-using Texas Instruments' LinBiCMOS process. It embeds current-limiting sense FETs instead of external fuses and uses an internal charge pump to eliminate dependency on continuous 12-V supply for gate drive.

Its control architecture accepts discrete logic inputs (A_VCC3/A_VCC5/A_VPP_PGM/A_VPP_VCC and equivalents for Slot B) to configure output voltages and sequencing, supports SHDN for global shutdown, and asserts OC during overcurrent events. The device operates across −40°C to 85°C and meets PC Card Standard voltage regulation and timing requirements.

Key Specifications

Pinout & Package

TPS2205IDFR is packaged in a 30-pin SSOP (DB) with 0.65-mm pitch, body size 7.2 × 8.2 mm, and exposed pad not present. Pin functions are validated per SLVS128E datasheet Figure 1 (DB top view) and Terminal Functions table.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2205IDFR, TPS2201IDBR lacks 3.3-V low-voltage mode and requires permanent 5-V bias, while MAX1681CPE+ provides no native dual-slot or 12-V Vpp integration-making TPS2205IDFR the only solution supporting full PCMCIA dual-slot, mixed-voltage, and flash-programming requirements in a single IC.

Availability

TPS2205IDFR is available at Aetrix Electronics and suitable for notebook computers, industrial PDAs, and digital cameras requiring stable component supply, long-term lifecycle support, and PCMCIA-compliant power switching.

Supply support for TPS2205IDFR 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 power management technologies with over 50 years of innovation in interface and system-power solutions.

The TPS2205IDFR belongs to TI's PC Card power-management product line, designed specifically to replace discrete MOSFET arrays in portable computing systems while meeting PCMCIA mechanical, electrical, and timing standards.

FAQ

What is the maximum continuous output current per VCC channel on the TPS2205IDFR?

The TPS2205IDFR supports 1 A continuous output current per VCC channel (Slot A or Slot B) at both 3.3 V and 5 V, verified per recommended operating conditions and typical characteristics curves in the SLVS128E datasheet. This rating holds across −40°C to 85°C ambient, with derating applied above 70°C per the Dissipation Rating Table for the DB package.

Does the TPS2205IDFR require a 12-V supply to operate normally?

No-the TPS2205IDFR uses an internal charge pump to generate required gate-drive voltages, so the 12-V input is needed only during flash-memory programming. In normal operation (e.g., 3.3-V or 5-V VCC delivery), the 12-V rail may be disabled to reduce system power consumption and extend battery life, as confirmed in the "12-V supply not required" section of the datasheet.

How does the TPS2205IDFR implement overcurrent protection without fuses?

The TPS2205IDFR uses integrated sense FETs per output channel to monitor current flow and linearly limit output current during overloads-eliminating external fuses. When triggered, it asserts the open-drain OC pin to signal the host controller, and activates thermal shutdown if sustained overtemperature occurs, as detailed in the "Overcurrent and Overtemperature Protection" application section.

Can the TPS2205IDFR operate with only a 3.3-V supply and no 5-V input?

Yes-the TPS2205IDFR supports 3.3-V low-voltage mode where VI(5V) = 0 V. In this mode, bias current is derived solely from the 3.3-V input pins, and only 3.3-V VCC outputs are enabled. The datasheet confirms this behavior and specifies corresponding rDS(on) and timing parameters for VI(5V)=0 operation.

What is the purpose of the SHDN pin on the TPS2205IDFR?

The SHDN pin is an active-low global shutdown control: when pulled low, it forces all VCC and Vpp outputs into high-impedance state, disables internal bias circuitry, and reduces quiescent current to ≤1 µA. This enables rapid system-level power gating during suspend or emergency shutdown, as specified in the Absolute Maximum Ratings and Recommended Operating Conditions tables.