Texas Instruments TPS2201IDFR

Overview

TPS2201IDFR from Texas Instruments is a dual-slot PC Card (PCMCIA) power-interface switch IC that integrates VCC and Vpp switching for 3.3-V, 5-V, and 12-V card power distribution. It features break-before-make switching, internal charge pump (no external capacitors), 160-mΩ rDS(on) for 5-V VCC outputs, thermal/short-circuit protection, and 1-µA shutdown current. It serves as the primary power management interface between parallel PCMCIA controllers and two hot-pluggable PC Cards in legacy portable computing systems.

For engineers reviewing the TPS2201IDFR datasheet, TPS2201IDFR pinout, TPS2201IDFR application, or TPS2201IDFR equivalent, this device is critical for designing compliant, fuseless, low-quiescent-power PC Card power interfaces with programmable VCC/Vpp sequencing, overcurrent reporting (OC), and dual-slot power-good status (APWR_GOOD/BPWR_GOOD).

Technical Context

The TPS2201IDFR implements dual independent power-switching channels-each supporting selectable 3.3-V/5-V VCC and 3.3-V/5-V/12-V Vpp outputs-controlled via dedicated logic inputs (e.g., A_VCC3/A_VCC5, A_VPP_PGM/A_VPP_VCC). Its LinBiCMOS process enables integrated sense-FET current limiting without external fuses and eliminates need for external 12-V supply during standby via on-chip charge pump.

It enforces PCMCIA-compliant voltage transitioning: active ground-switching discharges card capacitance to <0.8 V within 100 ms during 5-V-to-3.3-V transitions, and provides separate APWR_GOOD/BPWR_GOOD open-drain outputs asserting low when respective Vpp voltages fall outside ±5% of nominal (e.g., 10.72–11.4 V for 12-V mode with 50-mV hysteresis).

Key Specifications

Pinout & Package

TPS2201IDFR is housed in a 30-pin Shrink Small-Outline Package (SSOP-DB), 0.64-mm pitch, 7.2-mm × 5.3-mm body, RoHS-compliant. Pin functions are validated per TI SLVS094C Rev C datasheet (Jan 2001).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2201IDFR, TPS2202IDFR reduces channel count but retains full PCMCIA compliance for single-slot use, while MAX1681ESA+ sacrifices 3.3-V capability and autonomous 12-V generation-making it unsuitable for modern mixed-voltage hot-swap systems.

Availability

TPS2201IDFR is available at Aetrix Electronics and suitable for notebook computer design, industrial PCMCIA host adapters, and medical handheld terminals requiring stable component supply across extended product lifecycles.

Supply support for TPS2201IDFR 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 applications.

The TPS2201IDFR belongs to TI's PCMCIA power interface product line, engineered specifically to replace discrete MOSFETs, fuses, and charge-pump circuits in dual-slot portable computing platforms compliant with PCMCIA 2.1/3.0 standards.

FAQ

What is the primary function of the TPS2201IDFR in a PCMCIA system?

The TPS2201IDFR serves as a fully integrated dual-slot PC Card power interface switch that manages VCC (3.3 V/5 V) and Vpp (3.3 V/5 V/12 V) delivery, sequencing, and protection. It replaces discrete MOSFETs, fuses, and external charge-pump circuitry while enforcing PCMCIA-compliant hot-swap timing, discharge requirements, and fault reporting-ensuring safe, reliable operation of two PC Cards in portable systems. The TPS2201IDFR is essential for maintaining voltage accuracy, minimizing quiescent power, and enabling firmware-controlled power management.

Does the TPS2201IDFR require an external 12-V supply to operate?

No-the TPS2201IDFR incorporates an internal charge pump powered from its 5-V VDD supply, eliminating the need for a continuously enabled external 12-V rail. The 12-V input (pins 7, 24) is only required during flash-memory programming or erase cycles; otherwise, it can be disabled to extend battery life. This architecture reduces system-level power consumption and simplifies power supply design compared to legacy switches relying on always-on 12-V bias. The TPS2201IDFR maintains full functionality-including Vpp switching and overcurrent protection-using only the 5-V VDD and card-input rails.

How does the TPS2201IDFR ensure compliance with PCMCIA 3.3-V/5-V transition requirements?

The TPS2201IDFR meets PCMCIA 3.3-V/5-V switching specifications through active ground-switching circuitry that discharges card VCC capacitance to below 0.8 V within 100 ms during voltage transitions. This prevents damage to 3.3-V logic from residual 5-V charge and fulfills the mandatory "power reset" requirement. Control inputs (A_VCC3/A_VCC5) coordinate sequencing with the host controller, while break-before-make switching prevents cross-conduction. The TPS2201IDFR implements these behaviors in hardware-no firmware timing loops or external components are needed to satisfy the standard.

What protection features does the TPS2201IDFR provide against faulty PC Cards?

The TPS2201IDFR provides dual-layer protection: (1) Sense-FET-based current limiting that linearly folds back VCC output to 1.9 A and Vpp to 400 mA during overloads, preventing trace damage or supply collapse; and (2) Thermal shutdown that disables all outputs if junction temperature exceeds 150°C. It also asserts the OC pin low during sustained overcurrent and uses APWR_GOOD/BPWR_GOOD to flag Vpp undervoltage-enabling host firmware to isolate and disable a single faulty slot without affecting the other. These features eliminate the need for board-level fuses and improve field reliability. The TPS2201IDFR delivers deterministic, hardware-enforced fault response.

Is the TPS2201IDFR pin-compatible with other devices in the same family?

Yes-the TPS2201IDFR shares identical pinout and package (30-pin SSOP-DB) with the TPS2202IDFR (single-slot variant) and TPS2201Y (chip form), enabling layout reuse across designs with different slot counts. However, TPS2202IDFR omits B-side control and status pins (e.g., B_VCC3, BPWR_GOOD), leaving them no-connect; direct substitution requires firmware and schematic validation. The TPS2201IDFR is not pin-compatible with non-TI PCMCIA switches due to unique signal mapping (e.g., separate Vpp/VCC control pairs, dual PWR_GOOD outputs). Always verify signal routing and control logic when migrating. The TPS2201IDFR's pin assignment is fixed per TI SLVS094C.