LT1106 - Micropower Step-Up DC/DC Converter for PCMCIA Card Flash Memory

Features

  • Obsolete - Datasheet  For Information Purposes Only.  Contact Linear Technology for Potential Replacement
  • 60mA Output Current at 12V from 3V Supply
  • Shutdown to 10µA
  • Programmable 12V or 5V Output
  • Up to 85% Efficiency
  • Quiescent Current: 750µA
  • Low VCESAT Switch: 300mV at 0.5A Typical
  • Uses Low Value, Thin, Surface Mount Inductors
  • Ultra-Thin 20-Lead TSSOP Package

Typical Application

LT1106 Typical Application
LT1106 Typical Application

Description

Obsolete - Datasheet  For Information Purposes Only.  Contact Linear Technology for Potential Replacement

The LT®1106 is the industry’s first DC/DC converter designed for use on Type I and Type II PCMCIA cards. The device senses the VPP1 and VPP2 lines at the PCMCIA socket and generates a regulated 12V, 60mA programming supply if the socket does not provide it. Internal logic simplifies the interface to PCMCIA card microcontrollers. One input selects a 12V or 5V regulated output, while another input controls micropower shutdown. Two logic outputs indicate when the selected programming voltage is valid and whether the input supply is 3.3V or 5V.

The regulator features BurstMode™ operation with a 0.5A, 300mV switch for efficiency up to 85%. High frequency 500kHz switching permits the use of small value, flat inductors that fit neatly on PCMCIA cards. The device requires just 1µF of output capacitance.

Quiescent current is 750µA which drops to 350µA when the card runs off the socket supply. The shutdown pin reduces supply current to only 10µA. The device includes a soft start feature which limits supply current transients when the card is inserted into a hot socket.

Packaging

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

LT1106 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

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

  • PCMCIA Card Flash Memory VPP Generator
  • Portable Computers
  • Portable Instruments
  • DC/DC Converter Module Replacements

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LT1106

Technical Support