Texas Instruments TPS2202IDF

Overview

TPS2202IDF from Texas Instruments is a dual-slot PC Card (PCMCIA) power-interface switch IC that integrates VCC and Vpp switching for two independent PC Card slots. It supports 3.3-V, 5-V, and 12-V card power delivery with break-before-make sequencing, internal charge-pump-driven gate drive (eliminating external capacitors), and integrated overcurrent/thermal protection. It serves as the primary power-management interface between serial PCMCIA controllers and hot-pluggable memory or I/O cards in portable computing systems.

For engineers reviewing the TPS2202IDF datasheet, TPS2202IDF pinout, TPS2202IDF application, or TPS2202IDF equivalent, this device is critical for designing compliant, low-quiescent-power PC Card power distribution in battery-constrained platforms - especially where 12-V Vpp must be gated independently of main VCC rails and where fused protection is replaced by current-limited, fault-reporting MOSFET switching.

Technical Context

The TPS2202IDF implements a serial 3-wire control interface (DATA, CLOCK, LATCH) to configure dual-slot power states, eliminating up to 14 dedicated I/O lines required by parallel-control alternatives. Its LinBiCMOS process integrates high-side NMOS switches for AVCC/BVCC (3.3/5-V) and AVPP/BVPP (3.3/5/12-V), each with current-limit sensing and thermal shutdown circuitry.

It features an internal charge pump powered from 5-V VDD to generate gate-drive voltage for 12-V Vpp switches - enabling full 12-V disablement during standby. Power-good outputs (APWR_GOOD/BPWR_GOOD) monitor Vpp regulation thresholds (11.05 V ±50 mV), while OC reports overcurrent events to host firmware for diagnostics.

Key Specifications

Pinout & Package

TPS2202IDF is housed in a 30-pin Small-Outline (DF) package with 0.5-mm lead pitch and exposed thermal pad (not electrically connected). Pin numbering follows standard top-view orientation with Pin 1 at bottom-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2202IDF, TPS2202IDBR offers marginally better thermal dissipation in constrained airflow environments, while TPS2201IDF reduces cost and complexity for single-slot designs but sacrifices dual-slot fault isolation and independent power-good reporting.

Availability

TPS2202IDF is available at Aetrix Electronics and suitable for notebook computers, industrial PDAs, digital cameras, handheld terminals, and bar-code scanners requiring stable component supply for legacy PCMCIA interface designs.

Supply support for TPS2202IDF 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 connectivity technologies, with decades of expertise in power management and interface solutions.

The TPS2202IDF belongs to TI's PCMCIA power-interface switch product line, engineered specifically to replace discrete MOSFETs, fuses, and regulators in portable host systems - delivering full compliance with PCMCIA 3.3-V/5-V/12-V power sequencing and safety standards.

FAQ

What is the primary function of the TPS2202IDF in a PCMCIA system?

The TPS2202IDF serves as a dual-slot PC Card power-interface switch that controls and protects 3.3-V, 5-V, and 12-V power delivery to two independent PC Cards. It replaces discrete MOSFETs, fuses, and regulators with integrated current limiting, thermal shutdown, break-before-make sequencing, and serial configuration - all in a single 30-pin SSOP package. The TPS2202IDF ensures compliance with PCMCIA power specifications while minimizing board space and improving system reliability.

Does the TPS2202IDF require an external 12-V supply to operate?

No - the TPS2202IDF uses an internal charge pump powered from its 5-V VDD supply to generate gate-drive voltage for the 12-V Vpp switches. This allows the external 12-V rail to remain disabled except during flash-memory programming or erase cycles, significantly reducing standby power consumption. The TPS2202IDF only draws current from the 12-V inputs (Pins 7 and 24) when actively delivering Vpp to a card.

How does the TPS2202IDF handle overcurrent conditions?

When an overcurrent event occurs on any VCC or Vpp output, the TPS2202IDF activates internal current limiting - clamping output current to 1.3 A (VCC) or 200 mA (Vpp) without shutting down. Simultaneously, it asserts the open-drain OC pin low to signal the host microcontroller. If the condition persists and junction temperature exceeds 125°C, thermal shutdown disables all outputs until cooling restores safe operation. This dual-layer protection eliminates fuses while enabling real-time diagnostics.

Can the TPS2202IDF support mixed 3.3-V and 5-V PC Cards in the same system?

Yes - the TPS2202IDF supports independent voltage selection per slot: AVCC/BVCC outputs can be configured for either 3.3 V or 5 V, and AVPP/BVPP can deliver 3.3 V, 5 V, or 12 V depending on card requirements. Its break-before-make switching and programmable discharge ensure safe transition between voltages, satisfying PCMCIA 3.3-V/5-V compatibility protocols including capacitor discharge below 0.8 V before applying new VCC.

What is the significance of the APWR_GOOD and BPWR_GOOD signals on the TPS2202IDF?

APWR_GOOD and BPWR_GOOD are dedicated active-low power-good outputs that indicate whether the corresponding AVPP or BVPP output has reached and stabilized within its regulation threshold (11.05 V ±50 mV for 12-V mode). These signals allow the host controller to verify Vpp integrity before initiating flash programming or enabling card interface logic - preventing data corruption or hardware damage due to undervoltage conditions. They are essential for robust PCMCIA compliance.