Texas Instruments TPS2211APW

Overview

TPS2211APW 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 delivers 1 A at 3.3 V and 5 V via AVCC outputs, 150 mA at 12 V via AVPP, with 70-mΩ typical r_DS(on) for both 3.3-V and 5-V VCC switches, and features break-before-make switching, thermal shutdown at 140°C, and overcurrent reporting on OC pin - deployed in notebook computers and PDAs for hot-plug-safe PCMCIA interface management.

For engineers reviewing the TPS2211APW datasheet, TPS2211APW pinout, TPS2211APW application, or TPS2211APW equivalent, key selection criteria include its 20-pin HTSSOP (PWP) package, dual-rail voltage switching capability (3.3 V / 5 V / 12 V), current-limit reporting for fault isolation, 3.3-V low-voltage mode operation without 5-V bias, and compatibility with industry-standard PCMCIA controllers.

Technical Context

The TPS2211APW implements a LinBiCMOS-based integrated power-switch matrix with six internal MOSFETs (S1–S6) enabling independent control of AVCC (3.3 V/5 V) and AVPP (0 V/3.3 V/5 V/12 V) outputs via logic inputs VCCD0/VCCD1 and VPPD0/VPPD1. Its control logic supports PCMCIA-compliant voltage transitioning, including mandatory 3.3-V card reset via discharge to <0.8 V before 3.3-V application.

It integrates current-limit sensing per output (1 A typical for AVCC, 280 mA typical for AVPP), thermal limiting with 10°C hysteresis, and ESD protection rated to 2-kV HBM (10-kV with 0.1-µF output bypass). The device uses an internal charge pump to eliminate dependency on external 12-V supply for gate drive - allowing 12-V input to be disabled except during flash programming.

Key Specifications

Pinout & Package

The TPS2211APW is housed in a 20-pin HTSSOP (PWP) package with PowerPAD™ thermal enhancement, measuring 6.5 mm × 4.4 mm × 1.2 mm, and requires external tie-together of all four AVCC pins (13–16) and AVPP pin (11) for optimal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2211AIDB, the TPS2211APW offers better thermal margin in the same 20-pin footprint, while TPS2211APWP provides identical function with superior thermal performance due to PowerPAD™ - making TPS2211APW the balanced choice for mainstream notebook and PDA designs requiring reliable 1-A switching without thermal derating.

Availability

TPS2211APW is available at Aetrix Electronics and suitable for notebook computers, PDAs, digital cameras, and bar-code scanners requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for PCMCIA interface subsystems.

Supply support for TPS2211APW 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 portable and computing systems.

The TPS2211A product line was designed specifically to meet PCMCIA 3.3-V/5-V/12-V power interface requirements - integrating MOSFETs, protection, and sequencing logic into a single chip to replace discrete solutions in notebook, PDA, and peripheral card designs.

FAQ

What is the maximum continuous output current supported by the TPS2211APW on its AVCC and AVPP rails?

The TPS2211APW supports 1 A continuous output current on the AVCC rail (3.3 V or 5 V) and 150 mA continuous on the AVPP rail (12 V), as specified in the recommended operating conditions and confirmed by typical characteristics curves (Figures 19–21). These values are maintained across the full −40°C to 85°C ambient temperature range and align with PCMCIA power delivery standards for Type II cards.

Does the TPS2211APW require an external 12-V supply for normal operation?

No - the TPS2211APW uses an internal charge pump to generate gate drive voltages from the 3.3-V or 5-V inputs, so the 12-V supply (Pin 10) is only required during flash memory programming. This design significantly extends battery life in portable systems. The datasheet explicitly states the 12-V supply "can be disabled except during 12-V Flash Programming."

How does the TPS2211APW implement overcurrent protection and reporting?

The TPS2211APW uses integrated sense FETs (not external resistors) to monitor current on each AVCC and AVPP output independently. When overcurrent is detected (1–2.5 A for AVCC, 180–400 mA for AVPP), the OC pin pulls low while the affected output remains current-limited - not shut down - allowing other rails to stay active. This behavior is documented in the Electrical Characteristics and Application Information sections.

What is the purpose of tying together the four AVCC pins (13–16) on the TPS2211APW?

Tying AVCC pins 13–16 together externally minimizes total series resistance and thermal rise across the 1-A output path. The datasheet specifies this in the "Power-Supply Considerations" section: "It is recommended that all input and output power pins be paralleled for optimum operation." Failure to do so increases voltage drop and may cause regulation failure or thermal throttling.

Is the TPS2211APW pin-compatible with other devices in the TPS2211 family?

Yes - the TPS2211APW (20-pin HTSSOP) is pin-for-pin compatible with the TPS2211APWP (same package with PowerPAD™), and the datasheet confirms the TPS2211A is pin-compatible with TPS2211 and TPS2212 in the DB package. However, the 20-pin PW/PWP variants are not pin-compatible with the 16-pin DB variant due to differing pin counts and NC placements.