Texas Instruments TPS2220APWP

Overview

TPS2220APWP from Texas Instruments is a single-slot CardBus™ power-interface switch IC designed for controlled 3.3 V, 5 V, and 12 V distribution to PC Card sockets. It integrates dual VCC/VPP switching paths, features 110 mΩ typical rDS(on) at 5 V → xVCC, 1.3 Ω typical rDS(on) at 3.3/5 V → xVPP, 140 µA typical quiescent current from 3.3-V input, and operates across –40°C to 85°C ambient temperature. It enables compliant power management in notebook computers and digital cameras.

For engineers reviewing the TPS2220APWP datasheet, TPS2220APWP pinout, TPS2220APWP application, or TPS2220APWP equivalent, key selection criteria include its 24-pin HTSSOP (PWP) package, independent VPP/VCC control, break-before-make switching, thermal shutdown at 135°C, and support for serial interface programming via CLOCK/DATA/LATCH signals.

Technical Context

The TPS2220APWP implements two integrated N-channel MOSFET power switches per slot - one for VCC (3.3 V/5 V) and one for VPP (3.3 V/5 V/12 V) - with separate current-limit and thermal-protection circuits per path. Its logic section accepts TTL-compatible serial commands (CLOCK, DATA, LATCH) to configure output states, while RESET and SHDN provide asynchronous active-low control.

UVLO thresholds are set at 2.7 V (3.3-V rail) and 2.5 V (5-V rail), with 100 mV hysteresis; POR asserts RESET internally below 1.7 V. Output discharge resistors (0.7 kΩ at xVCC, 0.4 kΩ at xVPP) ensure safe turnoff. The device meets PC Card Standard requirements for peak/average current, voltage regulation, and fault reporting via open-drain OC pin.

Key Specifications

Pinout & Package

TPS2220APWP is housed in a 24-pin HTSSOP package (PWP), thermally enhanced with exposed thermal pad. Pin assignments follow JEDEC MO-153AC standard; pin 1 is top-left corner when notch faces up.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2223APWP and TPS2224APWP, the TPS2220APWP offers lowest BOM cost and smallest footprint for single-slot implementations, with no compromise on PCMCIA compliance, thermal protection, or serial programmability.

Availability

TPS2220APWP is available at Aetrix Electronics and suitable for notebook computers, digital cameras, bar code scanners, and set-top boxes requiring stable component supply with full lifecycle support.

Supply support for TPS2220APWP 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 solutions, with decades of experience in power management ICs for computing and communications.

The TPS2220A family was engineered specifically for PC Card and CardBus host controllers, delivering integrated, standards-compliant power switching with minimal external components and robust fault handling.

FAQ

What is the maximum continuous output current supported by TPS2220APWP on its xVCC and xVPP channels?

The TPS2220APWP supports 1 A steady-state output current on each xVCC channel (3.3 V/5 V) and 100 mA on the xVPP channel (3.3 V/5 V/12 V) at TJ = 100°C. These values are internally limited and optimized to meet PC Card specification peak and average current requirements without external current-sense resistors or fuses.

Does TPS2220APWP support 12-V VPP output, and how is it configured?

Yes, TPS2220APWP supports 12-V VPP output on pin 8 (AVPP). Configuration is performed via the serial interface: setting bit D10 = 1 in the 11-bit control word selects 12 V for AVPP, while D10 = 0 selects 5 V or 3.3 V depending on input voltage present. The 12-V input must be applied to pins 7 and 20 (both labeled 12V), which are externally tied together per datasheet Note C.

How does the OC (overcurrent) pin function in TPS2220APWP, and what external components are needed?

The OC pin is an open-drain output that pulls low when any switch (xVCC or xVPP) exceeds its current limit. An external pullup resistor to a valid logic-high voltage (e.g., 3.3 V or 5 V) is mandatory. Typical value is 10 kΩ, enabling direct connection to a microcontroller interrupt pin for real-time fault detection and logging in systems using TPS2220APWP.

What is the purpose of the SHDN and RESET pins on TPS2220APWP, and are pullup/pulldown resistors required?

SHDN (pin 21) and RESET (pin 12) are both active-low, internally pulled up. No external resistors are required for basic operation: pulling either pin low disables outputs (SHDN) or forces all switches into Hi-Z and activates discharge (RESET). Internal pullups ensure fail-safe startup - TPS2220APWP powers up fully functional unless explicitly disabled.

Can TPS2220APWP be used in systems without a microcontroller, relying only on hardware control signals?

Yes, TPS2220APWP supports hardware-only operation using RESET and SHDN for coarse control, but full VCC/VPP voltage selection and sequencing require the serial interface (CLOCK/DATA/LATCH). For fixed-configuration use cases - e.g., always enabling 5-V VCC and 12-V VPP - a simple shift register or FPGA can generate the static 11-bit word without software overhead, making TPS2220APWP viable in controllerless designs.