Features and Benefits

  • Both VCC and VPP Switching in a Single Package
  • Built-In Current Limit and Thermal Shutdown
  • 16-Pin (Narrow) SOIC Package
  • Inrush Current Limited (Drives 150µF Loads)
  • Continuous 12V Power Not Required
  • Extremely Low RDS(ON) NMOS Switches
  • Guaranteed 1A VCC Current and 120mA VPP Current
  • 1µA Quiescent Current in Standby
  • No External Components Required
  • Compatible with Industry Standard Controllers
  • Break-Before-Make Switching
  • Controlled Rise and Fall Times

Product Details

The LTC1472 switching matrix routes power to both the VCC and VPP power supply pins of the PCMCIA compatible card socket. The VCC output of the LTC1472 is switched between three operating states: OFF, 3.3V, and 5V. The VPP output is switched between four operating states: 0V, VCC, 12V, and Hi-Z. The output voltages are selected by two sets of digital inputs which are compatible with industry standard PC Card controllers (see Truth Tables).

The Vcc output of the LTC1472 can supply up to 1A of current and the VPP output up to 120mA. Both switches have built-in SafeSlot current limiting and thermal shutdown to protect the card, socket and power supply against accidental short-circuit conditions.

The LTC1472 is designed to conserve power by automatically dropping to 1µA standby current when the two outputs are switched OFF. A shutdown pin is provided which holds the external 12V regulator in standby mode except when required for VPP power.

The LTC1472 is available in 16-pin SO.


  • Notebook Computers
  • Palmtop Computers
  • Pen-Based Computers
  • Handi-Terminals
  • Bar-Code Readers

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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