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Overview

Features and Benefits

  • Outputs May Be Paralleled for Higher Current and Heat Spreading
  • Output Current: 1.1A
  • Single Resistor Programs Output Voltage
  • 1% Initial Accuracy of SET Pin Current
  • Output Adjustable to 0V
  • Low Output Noise: 40μVRMS (10Hz to 100kHz)
  • Wide Input Voltage Range: 1.2V to 36V
  • Low Dropout Voltage: 350mV (Except SOT-223 Package)
  • <1mV Load Regulation
  • <0.001%/V Line Regulation
  • Minimum Load Current: 0.5mA
  • Stable with 2.2μF Minimum Ceramic Output Capacitor
  • Current Limit with Foldback and Overtemperature Protected
  • Available in 8-Lead MSOP, 3mm × 3mm DFN
  • 5-Lead DD-Pak, TO-220 and 3-Lead SOT-223
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LT3080 is a 1.1A low dropout linear regulator that can be paralleled to increase output current or spread heat in surface mounted boards. Architected as a precision current source and voltage follower allows this new regulator to be used in many applications requiring high current, adjustability to zero, and no heat sink. Also the device brings out the collector of the pass transistor to allow low dropout operation —down to 350 millivolts— when used with multiple supplies.

A key feature of the LT3080 is the capability to supply a wide output voltage range. By using a reference current through a single resistor, the output voltage is programmed to any level between zero and 36V. The LT3080 is stable with 2.2μF of capacitance on the output, and the IC uses small ceramic capacitors that do not require additional ESR as is common with other regulators.

Internal protection circuitry includes current limiting and thermal limiting. The LT3080 regulator is offered in the 8-lead MSOP (with an exposed pad for better thermal characteristics), a 3mm × 3mm DFN, 5-lead DD-Pak, TO-220 and a simple-to-use 3-lead SOT-223 version.


Features
LT3080 -
LT3080-1 Can parallel without additional external resistance

Applications

  • High Current All Surface Mount Supply
  • High Efficiency Linear Regulator
  • Post Regulator for Switching Supplies
  • Low Parts Count Variable Voltage Supply
  • Low Output Voltage Power Supplies

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (2)

Documentation & Resources

  • View All (25)
  • Data Sheet (1)
  • Reliability Data (1)
  • Application Note (3)
  • User Guide (2)
  • Product Selector Card (1)
  • Product Selection Guide (1)
  • Solutions Bulletin & Brochure (1)
  • Technical Article (9)
  • Video (5)
  • Design Note (1)
  • Technical Article

    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

    Models for the following parts are available in LTspice:

    LT3080
    LT3080-1

    Reference Designs (10)

    Product Recommendations

    LT3080 Companion Parts

    Recommended Related Parts

    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
    LT3080EDD#PBF Material Declaration Reliability Data 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)
    LT3080EDD#TRPBF Material Declaration Reliability Data 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)
    LT3080EMS8E#PBF Material Declaration Reliability Data 8-Lead MSOP w/ EP
    LT3080EMS8E#TRPBF Material Declaration Reliability Data 8-Lead MSOP w/ EP
    LT3080EQ#PBF Material Declaration Reliability Data 5-Lead DD Pak
    LT3080EQ#TRPBF Material Declaration Reliability Data 5-Lead DD Pak
    LT3080EST#PBF Material Declaration Reliability Data 3-Lead SOT-223
    LT3080EST#TRPBF Material Declaration Reliability Data 3-Lead SOT-223
    LT3080EST#WPBF Material Declaration Reliability Data 3-Lead SOT-223
    LT3080EST#WTRPBF Material Declaration Reliability Data 3-Lead SOT-223
    LT3080ET#31PBF Material Declaration Reliability Data 5-Lead TO-220 (Flow 31)
    LT3080ET#PBF Material Declaration Reliability Data 5-Lead TO-220
    LT3080IDD#PBF Material Declaration Reliability Data 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)
    LT3080IDD#TRPBF Material Declaration Reliability Data 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)
    LT3080IMS8E#PBF Material Declaration Reliability Data 8-Lead MSOP w/ EP
    LT3080IMS8E#TRPBF Material Declaration Reliability Data 8-Lead MSOP w/ EP
    LT3080IQ#PBF Material Declaration Reliability Data 5-Lead DD Pak
    LT3080IQ#TRPBF Material Declaration Reliability Data 5-Lead DD Pak
    LT3080IST#PBF Material Declaration Reliability Data 3-Lead SOT-223
    LT3080IST#TRPBF Material Declaration Reliability Data 3-Lead SOT-223
    LT3080IST#WPBF Material Declaration Reliability Data 3-Lead SOT-223
    LT3080IST#WTRPBF Material Declaration Reliability Data 3-Lead SOT-223
    LT3080IT#PBF Material Declaration Reliability Data 5-Lead TO-220
    Wafer Fabrication Data R531 Reliability Data

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