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  2. Power Management
  3. Switching Regulators
  4. Step-Up (Boost) Regulators
  5. Internal Power Switch Boost Regulators
  6. LT1072

Data Sheet

Overview

Features and Benefits

  • Available in MiniDIP, TO-220, and TO-3 Packages
  • Wide Input Voltage Range: 3V to 60V
  • Low Quiescent Current: 6mA
  • Internal 1.25A Switch
  • Very Few External Parts Required
  • Self-Protected Against Overloads
  • Operates in Nearly All Switching Topologies
  • Shutdown Mode Draws Only 50µA Supply Current
  • Flyback-Regulated Mode has Fully Floating Outputs
  • Can be Externally Synchronized

Product Details

The LT®1072 is a monolithic high power switching regulator. It can be operated in all standard switching configurations including buck, boost, flyback, forward, inverting and “Cuk”. A high current, high efficiency switch is included on the die along with all oscillator, control, and protection circuitry. Integration of all functions allows the LT1072 to be built in a standard 5-pin TO-3 or TO-220 power package as well as the 8-pin miniDlP. This makes it extremely easy to use and provides "bustproof" operation similar to that obtained with 3-pin linear regulators.

The LT1072 operates with supply voltages from 3V to 60V, and draws only 6mA quiescent current. It can deliver load power up to 20 watts with no external power devices. By utilizing current-mode switching techniques, it provides excellent AC and DC load and line regulation.

The LT1072 has many unique features not found even on the vastly more difficult to use low power control chips presently available. It uses an adaptive anti-sat switch drive to allow very wide ranging load currents with no loss in efficiency. An externally activated shutdown mode reduces total supply current to 50µA typical for standby operation. Totally isolated and regulated outputs can be generated by using the optional “flyback regulation mode” built into the LT1072, without the need for optocouplers or extra transformer windings.

Applications

  • Logic Supply 5V at 2.5A
  • 5V Logic to ±15V Op Amp Supply
  • Offline Converter up to 50W
  • Battery Upconverter
  • Power Inverter (+ to -) or (- to +)
  • Fully Floating Multiple Outputs
  • Driver for High Current Supplies

Product Categories

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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.

Documentation & Resources

  • View All (13)
  • Data Sheets (1)
  • Reliability Data (1)
  • Application Notes (7)
  • Design Notes (4)
    • Document Type

    Tools & Simulations

    LTspice

    LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

    To launch ready-to-run LTspice demonstration circuits for this part:

    Step 1: Download and install LTspice on your computer.

    Step 2: Click on the link in the section below to download a demonstration circuit.

    Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

    LTspice

    LTspice Simulations

    LT1072HV Demo Circuit - 1.25A High Efficiency Switching Regulator (5V to 12V @ 350mA)

    Models for the following parts are available in LTspice:

    LT1072
    LT1072HV

    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.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    LT1072CN8#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
    LT1072CS8#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LT1072CS8#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
    LT1072CSW#PBF Material Declaration Reliability Data 16-Lead SOIC (Wide 0.3 Inch)
    LT1072CSW#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Wide 0.3 Inch)
    LT1072CT#06PBF Material Declaration Reliability Data 5-Lead TO-220 (Flow 06)
    LT1072CT#PBF Material Declaration Reliability Data 5-Lead TO-220
    LT1072HVCT#PBF Material Declaration Reliability Data 5-Lead TO-220
    LT1072HVIT#PBF Material Declaration Reliability Data 5-Lead TO-220
    LT1072IN8#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
    LT1072IT#PBF Material Declaration Reliability Data 5-Lead TO-220
    Wafer Fabrication Data R012 Reliability Data

    PCN-PDN Information

    Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.

    Select Model for PCN Information
    • LT1072CN8#PBF Production
    • LT1072CS8#PBF Production
    • LT1072CS8#TRPBF Production
    • LT1072CSW#PBF Production
    • LT1072CSW#TRPBF Production
    • LT1072CT#06PBF Production
    • LT1072CT#PBF Production
    • LT1072HVCT#PBF Production
    • LT1072HVIT#PBF Production
    • LT1072IN8#PBF Production
    • LT1072IT#PBF Production

    Support & Discussions

    LT1072 Discussions

    LT1070 and/or LT1074 Synchronization to External Clock
    All LT1072 Discussions
    LT1072 Contact ADI Technical Support »
    LT1072 Ask your question »
    LT1072 Contact ADI Technical Support » LT1072 Ask your question »

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