Texas Instruments TPS2206ADAP

Overview

TPS2206ADAP from Texas Instruments is a dual-slot PC CardBus power-interface switch providing integrated 3.3-V, 5-V, and 12-V VCC/VPP switching for two PC Card sockets. It features break-before-make switching, 85-mΩ rDS(on) on 3.3-V VCC paths, 1-A steady-state current limit per xVCC output, thermal shutdown at 135°C, and open-drain overcurrent reporting (OC). It is used in notebook computers and PDAs to enable hot-swap power control compliant with PC Card Standard.

For engineers reviewing the TPS2206ADAP datasheet, TPS2206ADAP pinout, TPS2206ADAP application, or TPS2206ADAP equivalent, key selection criteria include dual-slot VCC/VPP sequencing, independent 3.3/5/12-V support, short-circuit response time (<10 µs for xVCC), thermal trip hysteresis (10°C), and compatibility with P2C 3-lead serial interface for CardBus controllers.

Technical Context

The TPS2206ADAP implements two independent high-side MOSFET switch banks - one for AVCC/AVPP (Slot A) and one for BVCC/BVPP (Slot B) - each controlled via a P2C-compatible 3-wire serial interface (CLOCK, DATA, LATCH). It integrates UVLO thresholds (2.4 V for 3.3-V input, 2.3 V for 5-V input) and power-on reset (POR) asserting internal RESET below 1.7 V.

Switching behavior follows break-before-make timing to prevent cross-conduction; propagation delays range from 0.3 ms (xVCC turn-on) to 2.5 ms (xVCC turn-off) under 150-µF load. Overcurrent protection uses per-output sense FETs without added series resistance, enabling 1-A xVCC and 100-mA xVPP current limiting with active-low OC reporting.

Key Specifications

Pinout & Package

TPS2206ADAP is housed in a 32-pin PowerPAD™ TSSOP (DAP) package with exposed thermal pad for enhanced heat dissipation. The package supports 3191.4 mW power rating at 25°C ambient, derating to 638.29 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 TPS2206ADAP, TPS2206ADB trades thermal headroom for legacy SSOP compatibility, while TPS2226A adds functional flexibility via MODE-controlled VPP independence - neither is pin-compatible, but both serve overlapping dual-slot PC Card power roles.

Availability

TPS2206ADAP is available at Aetrix Electronics and suitable for notebook computers, PDAs, and set-top boxes requiring stable component supply, long-term industrial availability, and compliance with PC Card Standard power sequencing.

Supply support for TPS2206ADAP 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 company specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and computing markets.

The TPS22xx family was designed specifically to replace mechanical switches and discrete fuse+MOSFET solutions in PC Card and CardBus host systems, delivering integrated, standards-compliant power management with diagnostic feedback.

FAQ

What is the function of the SHDN pin on the TPS2206ADAP?

The SHDN (Shutdown) pin on the TPS2206ADAP is an asynchronous active-low input that forces all VCC and VPP outputs into high-impedance (Hi-Z) state, effectively disconnecting both PC Card slots from their power sources. It provides hardware-level emergency power cutoff independent of the serial interface. When asserted, TPS2206ADAP draws ≤2 µA quiescent current and maintains OC pin status until released. This function mirrors the serial command bit D8 but responds faster and without clock dependency.

How does the TPS2206ADAP handle overcurrent conditions on its xVPP outputs?

The TPS2206ADAP limits xVPP output current to 100 mA steady-state (200 mA typical short-circuit limit) using per-output sense FETs. When exceeded, it asserts the open-drain OC pin low within 3 µs and holds the output in current-limited mode. Unlike xVCC paths, xVPP does not shut down fully during overcurrent - it sustains regulated current delivery while signaling fault. This behavior supports flash programming where brief overloads may occur, and is confirmed in Electrical Characteristics tables for IO(xVPP) and IOS(xVPP) parameters.

Can the TPS2206ADAP support 1.8-V PC Cards?

No, the TPS2206ADAP does not support 1.8-V PC Cards. Its input voltage ranges are specified only for 3.3 V (−0.3 V to 5.5 V), 5 V (−0.3 V to 5.5 V), and 12 V (−0.3 V to 14 V), and its output switching architecture is optimized for 3.3/5/12-V PC Card profiles. The datasheet explicitly lists TPS2228 as the family member supporting 1.8-V operation; TPS2206ADAP lacks the low-voltage gate drive and UVLO thresholds required for reliable 1.8-V VCC switching.

What is the purpose of the RESET input on the TPS2206ADAP?

The RESET input on the TPS2206ADAP is an active-low logic signal that triggers internal power-on reset (POR) initialization: it opens all VCC/VPP switches and closes all discharge switches, forcing outputs to 0 V and clearing internal register state. It operates independently of the serial interface and is intended for system-level cold start or recovery after brownout. The datasheet specifies VI(POR) = 1.7 V - below this, RESET is asserted internally even if the pin is unconnected - ensuring fail-safe behavior when 3.3-V supply falls.

Does the TPS2206ADAP require external components for basic operation?

Yes, the TPS2206ADAP requires three external components for guaranteed operation: (1) a pullup resistor on the OC pin (typically 10 kΩ to 3.3 V), (2) decoupling capacitors (0.1 µF ceramic) on each power input (3.3V, 5V, 12V), and (3) a pullup resistor on SHDN if left unconnected (internal pullup exists but is weak). No external current-sense resistors or fuses are needed due to integrated protection. These requirements are validated in the Typical Application schematic and Absolute Maximum Ratings table.