Texas Instruments TPS2211APWP

Overview

TPS2211APWP from Texas Instruments is a fully integrated PC Card power-interface switch for single-slot 3.3-V/5-V/12-V card power distribution. It provides dual switched outputs (AVCC and AVPP), 70-mΩ typical r_DS(on) for 3.3-V/5-V VCC switching, 1-A continuous AVCC output, 150-mA AVPP output, and break-before-make control logic - deployed in notebook computers, PDAs, and digital cameras for hot-plug-safe PCMCIA interface management.

For engineers reviewing the TPS2211APWP datasheet, TPS2211APWP pinout, TPS2211APWP application, or TPS2211APWP equivalent, key selection criteria include its 20-pin HTSSOP PowerPAD^® package with thermal enhancement, integrated overcurrent reporting (OC pin), shutdown-controlled high-impedance state, and compatibility with industry-standard PCMCIA controllers without external fuses.

Technical Context

The TPS2211APWP implements independent MOSFET-based switching paths for AVCC (3.3-V/5-V) and AVPP (3.3-V/5-V/12-V), each with dedicated current-limit sensing and thermal shutdown. Its LinBiCMOS^® process enables internal charge-pump biasing - eliminating need for continuous 12-V supply except during flash programming.

Control logic uses two-bit encoding per output (VCCD0/VCCD1 and VPPD0/VPPD1) to select 0 V, 3.3 V, 5 V, or 12 V (AVPP only), with SHDN forcing all outputs to high-impedance. Break-before-make sequencing prevents cross-conduction during voltage transitions required by PCMCIA 3.3-V/5-V mixed-mode operation.

Key Specifications

Pinout & Package

The TPS2211APWP is housed in a thermally enhanced 20-pin HTSSOP (PWP) package with exposed PowerPAD^® for improved heat dissipation - rated at 2740 mW at 25°C ambient and 1096 mW at 85°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2211AIDB and TPS2212IDB, the TPS2211APWP delivers superior thermal performance via PowerPAD^®, full 3.3-V/5-V/12-V support, and higher current capability - making it the optimal choice for thermally demanding, multi-voltage PCMCIA host designs.

Availability

TPS2211APWP is available at Aetrix Electronics and suitable for notebook computer motherboards, industrial PDA expansion slots, and digital camera media adapters requiring stable component supply across extended product lifecycles.

Supply support for TPS2211APWP 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 ICs for computing and portable electronics.

The TPS2211A product line was designed specifically to replace discrete MOSFET + logic solutions in PCMCIA-compliant host systems, delivering integrated protection, sequencing, and multi-voltage switching in a single IC.

FAQ

What is the function of the OC pin on the TPS2211APWP?

The OC (Overcurrent) pin on the TPS2211APWP is an open-drain logic output that pulls low when either the AVCC or AVPP output enters overcurrent limiting. This signal enables host firmware to detect and isolate card-level faults without requiring external current-sense circuitry. The TPS2211APWP uses internal sense FETs - not resistors - so the OC assertion occurs with minimal added voltage drop or power loss, preserving regulation accuracy while supporting real-time diagnostics.

Does the TPS2211APWP require an external 12-V supply to operate?

No, the TPS2211APWP does not require a continuous external 12-V supply. Its internal charge pump generates necessary gate-drive voltages from the 3.3-V or 5-V inputs, allowing the 12-V rail to be disabled except during flash-memory programming. When 12-V is unused, the TPS2211APWP draws only ≤1 µA in shutdown mode - significantly extending battery life in portable hosts. However, the 12-V input pin must not be grounded if unused, per TI application guidance.

How does the TPS2211APWP support PCMCIA 3.3-V/5-V mixed-mode operation?

The TPS2211APWP supports PCMCIA 3.3-V/5-V mixed-mode operation through hardware-enforced break-before-make switching and programmable output grounding. Its control logic (VCCD0/VCCD1 and VPPD0/VPPD1) sequences voltage transitions to ensure card capacitance discharges below 0.8 V before applying 3.3-V power - satisfying the PCMCIA specification for safe 5-V-to-3.3-V migration. The TPS2211APWP also provides dedicated ground-switching capability to actively discharge VCC lines within 100 ms.

What is the purpose of tying the four AVCC pins together externally on the TPS2211APWP?

The four AVCC pins (13–16) on the TPS2211APWP must be tied together externally near the package to minimize total series resistance and ensure uniform current sharing. Each pin is rated for the full 1-A output, but leaving them unconnected increases effective r_DS(on), causing excessive voltage drop, regulation error, and localized heating. Proper paralleling maintains ≤100 mV drop at 1 A - meeting PCMCIA 5-V ±5% regulation and preventing thermal runaway under load.

Can the TPS2211APWP be used in new designs despite its 2005-revised datasheet?

Yes, the TPS2211APWP remains actively manufactured and supported by Texas Instruments for legacy PCMCIA interface designs. TI maintains full production status, long-term availability commitments, and technical documentation - including application notes on thermal design, ESD hardening, and PCMCIA compliance testing. The TPS2211APWP's robust architecture, PowerPAD^® thermal performance, and proven field reliability make it a validated solution for industrial and medical devices requiring certified PC Card interoperability.