Texas Instruments TPS2211APWPR

Overview

TPS2211APWPR 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 3.3-V/5-V VCC switching, break-before-make control logic, and integrated overcurrent/thermal protection - used in notebook computers and PDAs for compliant PCMCIA power management.

For engineers reviewing the TPS2211APWPR datasheet, TPS2211APWPR pinout, TPS2211APWPR application, or TPS2211APWPR equivalent, key selection criteria include its dual-rail AVCC/AVPP switching capability, 3.3-V low-voltage mode operation without 5-V bias, OC fault reporting, and HTSSOP-20 (PWP) package thermal performance up to 125°C junction temperature.

Technical Context

The TPS2211APWPR implements independent, logic-controlled MOSFET switches for VCC (3.3 V/5 V) and Vpp (3.3 V/5 V/12 V) rails using Texas Instruments' LinBiCMOS process. Its internal current-sense FETs enable per-rail overcurrent limiting without external sense resistors, and an internal charge pump eliminates dependency on continuous 12-V supply for gate drive.

Control logic uses two-bit encoding (VCCD0/VCCD1 and VPPD0/VPPD1) to select output voltage or high-impedance state per rail, with SHDN forcing all outputs to Hi-Z. Break-before-make sequencing prevents rail shorting during voltage transitions, satisfying PCMCIA 3.3-V/5-V switching requirements including controlled discharge to <0.8 V before 3.3-V application.

Key Specifications

Pinout & Package

The TPS2211APWPR is housed in a 20-pin HTSSOP (PWP) package with PowerPAD™ thermal enhancement, rated for 2740 mW dissipation 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 TPS2211APWPR, TPS2211APWP offers identical performance in alternate packaging, while TPS2211IDB trades thermal capacity and pin count for slightly lower r_DS(on) - making the PWP variant optimal for high-current, thermally demanding PC Card host designs.

Availability

TPS2211APWPR is available at Aetrix Electronics and suitable for notebook computers, PDAs, digital cameras, and bar-code scanners requiring stable component supply and long-term PCMCIA interface support.

Supply support for TPS2211APWPR 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 experience in power management ICs for computing and portable systems.

The TPS2211A product line was designed specifically to replace discrete MOSFETs, fuses, and logic in PC Card host controllers - delivering full compliance with PCMCIA standards while reducing BOM count and improving reliability.

FAQ

What is the function of the SHDN pin on the TPS2211APWPR?

The SHDN pin on the TPS2211APWPR is a logic-input that forces all power outputs (AVCC and AVPP) into high-impedance state when driven high. This feature enables complete power isolation during system sleep or software-initiated shutdown, reducing quiescent current to ≤1 µA. The TPS2211APWPR resumes normal operation upon SHDN deassertion, retaining full control over VCC/Vpp rail selection via VCCD/VPPD inputs.

Does the TPS2211APWPR support 3.3-V-only operation without a 5-V supply?

Yes, the TPS2211APWPR supports true 3.3-V low-voltage mode: when VI(5V) = 0 V, it derives bias power from the 3.3-V input and delivers only 3.3 V to the AVCC output. This mode is explicitly validated in the datasheet for sleep and pager applications. The TPS2211APWPR maintains full overcurrent reporting, thermal protection, and control logic functionality in this configuration - no 5-V rail is required.

How does the TPS2211APWPR implement break-before-make switching?

The TPS2211APWPR implements break-before-make switching through internal control logic that ensures no overlap between old and new voltage states on AVCC and AVPP outputs. When control bits (VCCD0/VCCD1 or VPPD0/VPPD1) change, the device first opens the existing switch path, waits a defined interval, then closes the new path - verified in timing diagrams Figures 2–13. This sequencing satisfies PCMCIA requirements for safe 3.3-V/5-V transitions and prevents bus contention in the TPS2211APWPR.

What is the purpose of the OC pin on the TPS2211APWPR?

The OC (Overcurrent) pin on the TPS2211APWPR is an open-drain, active-low output that asserts logic low when either AVCC or AVPP output exceeds its respective current limit (1.6 A typical for AVCC, 280 mA for AVPP). It provides immediate, hardware-level fault indication without software polling. The TPS2211APWPR continues regulating the non-faulted rail, enabling targeted diagnostics - for example, isolating a shorted PC Card while maintaining host operation.

Can the TPS2211APWPR drive 12-V flash programming without continuous 12-V supply?

Yes, the TPS2211APWPR uses an internal charge pump to generate gate-drive voltages, so the 12-V input is required only during actual flash programming - not for chip bias. The datasheet confirms the 12-V supply can be disabled between operations to extend battery life. When enabled, the TPS2211APWPR delivers up to 150 mA at 12 V to AVPP with 1.5 Ω typical r_DS(on), supporting standard EEPROM/Flash write cycles without external boost circuitry.