Texas Instruments TPS2220BDBR

Overview

TPS2220BDBR from Texas Instruments is a single-slot PCMCIA power-interface switch IC that integrates 3.3 V, 5 V, and 12 V switching for AVCC and AVPP outputs with independent control, 1 A steady-state current limit on AVCC, 100 mA on AVPP, and break-before-make sequencing - used in notebook computers and bar code scanners to meet PC Card™ standards.

For engineers reviewing the TPS2220BDBR datasheet, TPS2220BDBR pinout, TPS2220BDBR application, or TPS2220BDBR equivalent, key selection considerations include its dual-output voltage independence, thermal shutdown at 135°C, 140 µA typical quiescent current from 3.3 V, TTL-compatible logic inputs, and HTSSOP-24 package compatibility with PCMCIA host controller power management.

Technical Context

The TPS2220BDBR implements a serial-control interface (CLOCK/DATA/LATCH) with asynchronous RESET and SHDN pins to configure AVCC and AVPP output states per PC Card specification. It uses internal charge-pump gate drive to eliminate dependency on external 12 V for chip operation - enabling 12 V supply disablement when not needed by the card.

Each output features dedicated current-sense FETs for independent overcurrent limiting (1 A AVCC, 200 mA AVPP typ.), fast response (<10 µs), and open-drain OC reporting. Thermal protection triggers full shutdown at 135°C with 10°C hysteresis, while UVLO ensures AVCC remains Hi-Z below 2.7 V and AVPP below 2.5 V on respective inputs.

Key Specifications

Pinout & Package

TPS2220BDBR is packaged in a 24-pin HTSSOP (PWP) with PowerPAD™ thermal enhancement, measuring 7.8 mm × 4.4 mm × 1.2 mm, and rated for –40°C to +85°C ambient operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2220BDBR, TPS2220BPWP offers superior thermal management for sustained 1 A AVCC loads, while TPS2220BDB provides identical functionality in a smaller thermal envelope - making TPS2220BDBR the balanced choice for general-purpose notebook and portable host designs requiring verified HTSSOP-24 reliability and sourcing continuity.

Availability

TPS2220BDBR is available at Aetrix Electronics and suitable for notebook computers, bar code scanners, digital cameras, and set-top boxes requiring stable component supply across industrial temperature ranges and long-lifecycle production programs.

Supply support for TPS2220BDBR 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 PC Card and interface IC expertise.

The TPS2220BDBR belongs to TI's PCMCIA power-interface switch product line, engineered specifically to replace fuses and discrete MOSFETs in portable host systems while meeting PCMCIA mechanical, electrical, and timing specifications.

FAQ

What is the function of the OC pin on the TPS2220BDBR?

The OC (Overcurrent) pin on the TPS2220BDBR is an open-drain output that asserts low whenever any AVCC or AVPP output exceeds its current limit - e.g., AVCC >1.4 A or AVPP >200 mA. It requires an external pullup resistor and connects directly to a microcontroller interrupt input for real-time fault diagnostics. The TPS2220BDBR does not auto-retry; OC remains asserted until the fault clears and the device resets via /RESET or power cycle.

Does the TPS2220BDBR require external components for basic operation?

Yes - the TPS2220BDBR requires at minimum: (1) a 4.7 µF ceramic capacitor on the 3.3 V input (pin 13) for stable charge-pump operation, (2) external pullup resistors on /RESET, /SHDN, and OC pins, and (3) 0.1 µF bypass capacitors near AVCC and AVPP outputs. No external sense resistors, fuses, or discharge circuits are needed - all protection and sequencing are integrated into the TPS2220BDBR.

How does the TPS2220BDBR handle 3.3 V and 5 V card compatibility?

The TPS2220BDBR supports mixed-voltage PC Card insertion by enabling 5 V on AVCC first, then using the host controller to poll the card's CIS register. Once 3.3 V compatibility is confirmed, the TPS2220BDBR discharges AVCC to <0.8 V within 100 ms using internal transistors, then re-applies 3.3 V - satisfying PCMCIA's mandatory voltage-transitioning requirement. This sequence is controlled entirely via the TPS2220BDBR's serial interface.

Can the TPS2220BDBR operate without a 12 V supply?

Yes - the TPS2220BDBR functions fully with only 3.3 V (pin 13) and 5 V (pins 1, 2) applied. Its internal charge pump generates gate drive voltages from 3.3 V, so 12 V (pin 7) is optional and only required when AVPP output must deliver 12 V. When 12 V is absent, AVPP can still supply 3.3 V or 5 V, and the TPS2220BDBR draws no current from the missing rail - simplifying power architecture in 3.3/5 V-only systems.

What is the purpose of the NC pins on the TPS2220BDBR?

The TPS2220BDBR has nine NC (No Connection) pins - terminals 6, 14, 16–20, 22–24 - which have no internal bond wire or circuit connection. They must remain unconnected and unpopulated on PCB layout. These pins exist for package compatibility with other devices in the family (e.g., TPS2220A) and do not affect TPS2220BDBR functionality or thermal performance when left floating.