LT3080-1 - Parallelable 1.1A Adjustable Single Resistor Low Dropout Regulator

Features

  • Internal Ballast Resistor Permits Direct Connection to Power Plane 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: 300mV
  • <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 and 3mm x 3mm DFN
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LT3080-1 Typical Application
LT3080-1 Typical Application

Description

The LT3080-1 is a 1.1A low dropout linear regulator that incorporates an internal ballast resistor to allow direct paralleling of devices without the need for PC board trace resistors. The internal ballast resistor allows multiple devices to be paralleled directly on a surface mount board for higher output current and power dissipation while keeping board layout simple and easy. The device brings out the collector of the pass transistor to allow low dropout operation—down to 350mV—when used with multiple input supplies.

The LT3080-1 is capable of supplying a wide output voltage range. A reference current through a single resistor programs the output voltage to any level between zero and 36V. The LT3080-1 is stable with 2.2μF of ceramic capacitance on the output, not requiring additional ESR as is common with other regulators.

 Internal protection includes current limiting and thermal limiting. The LT3080-1 regulator is offered in the 8- lead MSOP (with an Exposed Pad for better thermal characteristics) and 3mm × 3mm DFN packages.

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

Packaging

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
Drawing
RoHS
LT3080EDD-1#PBF 3x3 DFN-8 DD E 05-08-1698 Yes
LT3080EDD-1#TRPBF 3x3 DFN-8 DD E 05-08-1698 Yes
LT3080EMS8E-1#PBF MS-8 MS8 E 05-08-1660 Yes
LT3080EMS8E-1#TRPBF MS-8 MS8 E 05-08-1660 Yes
LT3080IDD-1#PBF 3x3 DFN-8 DD I 05-08-1698 Yes
LT3080IDD-1#TRPBF 3x3 DFN-8 DD I 05-08-1698 Yes
LT3080IMS8E-1#PBF MS-8 MS8 I 05-08-1660 Yes
LT3080IMS8E-1#TRPBF MS-8 MS8 I 05-08-1660 Yes


LT3080-1 Package Drawing
LT3080-1 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
(1-99)
Price
(1k)*
RoHS
LT3080EDD-1#PBF 3x3 DFN-8 E $2.69 $1.88 Yes
LT3080EDD-1#TRPBF 3x3 DFN-8 E $2.75 $1.94 Yes
LT3080EMS8E-1#PBF MS-8 E $2.77 $1.94 Yes
LT3080EMS8E-1#TRPBF MS-8 E $2.00 Yes
LT3080IDD-1#PBF 3x3 DFN-8 I $3.09 $2.16 Yes
LT3080IDD-1#TRPBF 3x3 DFN-8 I $2.21 Yes
LT3080IMS8E-1#PBF MS-8 I $3.19 $2.23 Yes
LT3080IMS8E-1#TRPBF MS-8 I $2.29 Yes
Buy NowRequest Samples
* 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

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.

Part Number Description Price Documentation
DC1368A LT3080EDD-1 Demo Board | LT3080-1(x4), Paralleled, Single Resistor Prog Low Noise LDOs, 1.7V ≤ VIN ≤ 25V, Vout = 1.2V @ 4.4A $150.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3080IDD-1#PBF 3x3 DFN-8 I $3.09 $2.16 Yes
LT3080IDD-1#TRPBF 3x3 DFN-8 I $2.21 Yes
LT3080IMS8E-1#PBF MS-8 I $3.19 $2.23 Yes
LT3080IMS8E-1#TRPBF MS-8 I $2.29 Yes
Buy NowRequest Samples
* 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.

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

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Design Tools

LTspice

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Models for the following parts are available in LTspice:
LT3080
LT3080-1

Technical Support