Texas Instruments TPS2220BPWPR

Overview

TPS2220BPWPR from Texas Instruments is a single-slot PCMCIA power-interface switch IC designed for controlled 3.3 V, 5 V, and 12 V distribution to one card socket. It integrates AVCC and AVPP switching, features 1 A steady-state current limit on AVCC outputs, 100 mA on AVPP, 140 µA typical quiescent current at 3.3 V, and operates across –40°C to 85°C ambient temperature. It is used in notebook computers and PDAs requiring compliant, fuseless power management for PC Card slots.

For engineers reviewing the TPS2220BPWPR datasheet, TPS2220BPWPR pinout, TPS2220BPWPR application, or TPS2220BPWPR equivalent, key selection criteria include its independent VPP/VCC control, break-before-make switching, thermal and short-circuit protection, and HTSSOP-24 package compatibility with PCMCIA host designs.

Technical Context

The TPS2220BPWPR implements dual-output power switching using integrated N-channel MOSFETs with internal current-sense FETs for per-output overcurrent limiting-no external sense resistors required. Its logic interface uses TTL-compatible serial control (CLOCK/DATA/LATCH) with asynchronous RESET and SHDN inputs.

It supports voltage-transitioning sequences mandated by PCMCIA: discharge of AVCC/AVPP outputs to <0.8 V before 3.3 V application, with dedicated discharge transistors providing ≤100 ms discharge time. The device uses an internal charge pump powered from 3.3 V input, eliminating mandatory 12 V supply for gate drive except when 12 V output is active.

Key Specifications

Pinout & Package

TPS2220BPWPR is housed in a 24-pin HTSSOP (PWP) package with exposed thermal pad (PowerPAD™). Pin 20 is NC (no internal connection); all other pins match the TPS2220B functional assignment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2220BDB and TPS2220APWP, the TPS2220BPWPR offers superior thermal handling, full 12 V capability, and true independent VPP/VCC control-critical for modern PC Card interoperability and robust field operation.

Availability

TPS2220BPWPR is available at Aetrix Electronics and suitable for notebook computers, PDAs, digital cameras, and set-top boxes requiring stable component supply, long-term lifecycle support, and PCMCIA-compliant power sequencing.

Supply support for TPS2220BPWPR 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, with decades of experience in interface and power-switching ICs.

The TPS2220B product line was engineered specifically for PCMCIA host controllers, delivering integrated, fuseless, and standards-compliant power switching for single-slot portable computing systems.

FAQ

What is the function of the OC pin on the TPS2220BPWPR?

The OC (Overcurrent) pin on the TPS2220BPWPR is an open-drain output that asserts low whenever any AVCC or AVPP output enters current-limit mode. It requires an external pullup resistor and enables host microcontrollers to detect and log overcurrent faults in real time. This signal is active during both transient shorts and sustained overload conditions, and remains asserted until the fault clears and the device recovers-providing actionable diagnostic feedback without polling. The TPS2220BPWPR's OC behavior is defined in its electrical characteristics table with VO(sat) ≤ 0.4 V at 2 mA sink current.

Does the TPS2220BPWPR require a 12-V supply to operate?

No, the TPS2220BPWPR does not require a continuous 12-V supply to operate. Its internal charge pump generates gate-drive voltage from the 3.3-V input (pin 13), allowing full functionality-including AVCC switching and logic control-with only 3.3 V applied. The 12-V input (pin 7) is needed only when the AVPP output must deliver 12 V to the card; otherwise, it may be left unconnected or disabled. This architecture significantly reduces system-level power consumption and extends battery life in portable applications using the TPS2220BPWPR.

How does the TPS2220BPWPR meet PCMCIA discharge requirements?

TPS2220BPWPR meets PCMCIA discharge requirements by integrating dedicated NMOS discharge transistors on both AVCC and AVPP outputs. When RESET is asserted or SHDN is activated, these transistors turn on and actively pull the outputs to GND. Electrical testing confirms discharge to <0.8 V occurs within ≤100 ms under worst-case load capacitance (150 µF on AVCC, 10 µF on AVPP), satisfying the PC Card Standard. This eliminates reliance on passive card-side discharge paths and ensures deterministic power-reset behavior-critical for reliable 3.3 V/5 V transition sequencing in the TPS2220BPWPR.

What is the significance of pin 20 being NC on the TPS2220BPWPR?

Pin 20 on the TPS2220BPWPR is designated NC (No Connection), meaning it has no internal bond wire or circuit connection. This distinguishes the TPS2220BPWPR from the TPS2220A, which uses pin 20 for a functional signal. The NC status is confirmed in TI's official datasheet pin-function table and functional block diagram. Designers must leave pin 20 floating-no routing, grounding, or pulling is required or recommended. This pin difference is the sole functional distinction between TPS2220B and TPS2220A in the PWP package, and it ensures backward compatibility while simplifying layout for TPS2220BPWPR-based designs.

Can the TPS2220BPWPR support mixed 3.3-V and 5-V PC Cards?

Yes, the TPS2220BPWPR fully supports mixed 3.3-V and 5-V PC Cards per the PCMCIA specification. It implements voltage-transitioning logic: first applying 5 V to detect card type, then discharging AVCC below 0.8 V before applying 3.3 V. Its independent VPP/VCC control allows simultaneous 5 V power delivery and 3.3 V programming voltage if required. The device's serial interface accepts 11-bit commands (D0–D10) to configure output states precisely, enabling host software to orchestrate compliant sequencing. All timing-including discharge, rise/fall, and propagation delays-is characterized across temperature and load, ensuring robust operation with mixed-voltage cards using the TPS2220BPWPR.