LT1312 - Single PCMCIA VPP Driver/Regulator
Features
- Obsolete - Datasheet For Information Purposes Only. Contact Linear Technology for Potential Replacement
- Digital Selection of 0V, VCC, 12V or Hi-Z
- 120mA Output Current Capability
- Internal Current Limiting and Thermal Shutdown
- Automatic Switching from 3.3V to 5V
- Powered from Unregulated 13V to 20V Supply
- Logic Compatible with Standard PCMCIA Controllers
- 1µF Output Capacitor
- 30µA Quiescent Current in Hi-Z or 0V Mode
- VPP Valid Status Feedback Signal
- No VPP Overshoot
- 8-Pin SO Packaging
Typical Application
Description
Obsolete - Datasheet For Information Purposes Only. Contact Linear Technology for Potential Replacement
The LT1312 is a member of Linear Technology Corporation’s family of PCMCIA drivers/regulators. The LT1312 provides 0V, 3.3V, 5V, 12V and Hi-Z regulated power to the VPP pin of a PCMCIA card slot from a single unregulated 13V to 20V supply. When used in conjunction with a PC card interface controller, the LT1312 forms a complete minimum component-count interface for palm-top, pen-based and notebook computers. The VPP output voltage is selected by two logic compatible digital inputs which interface directly with industry standard PC card interface controllers.
Automatic 3.3V to 5V switching is provided by an internal comparator which continuously monitors the PC card VCC supply and automatically adjusts the regulated VPP output to match VCC when the VPP = VCC mode is selected.
An open-collector VPP VALID output is driven low when VPP is in regulation at 12V.
The LT1312 is available in an 8-pin SO package.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
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
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.Click here to view our complete list of demo boards
Applications
- Notebook Computers
- Palmtop Computers
- Pen-Based Computers
- Handi-Terminals
- Bar-Code Readers
- Flash Memory Programming
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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
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.