LTC1472 - Protected PCMCIA VCC and VPP Switching Matrix


  • 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

Typical Application

LTC1472 Typical Application
LTC1472 Typical Application


The LTC®1472 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.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC1472CS#PBF SO-16 S C 05-08-1610 (S16) Yes
LTC1472CS#TRPBF SO-16 S C 05-08-1610 (S16) Yes

LTC1472 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC1472CS#PBF SO-16 C $4.15 $3.40 Yes
LTC1472CS#TRPBF SO-16 C $3.46 Yes
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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 Linear Technology sales office or authorized distributor.

Demo Boards

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
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  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

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