LT3080
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LT3080

Adjustable 1.1A Single Resistor Low Dropout Regulator

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Documentation View All Documentation
LTspice LT3080 - LDO Linear Regulators Download 0.99 KB LTspice LT6110 - Power Monitor, Control, and Protection, LT3080 - LDO Linear Regulators Download 2.52 KB LTspice LT3080 Demo Circuit - Parallel 1.1A Single Resistor Low Dropout Regulator (12V to 3V @ 3A) Download 2.00KB LTspice LT3080 Demo Circuit - 1.1A Single Resistor Low Dropout Regulator (12V to 3V @ 1.1A) Download 1.00KB LTspice LT3080 Demo Circuit - 1.1A Single Resistor LDO Regulator (12V to 1.8V @ 1A) Download 1.00KB
Part Models 23
1ku List Price Starting From $2.20
Features
  • 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
Additional Details
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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
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file View Data Sheet (Rev.D)
Documentation View All Documentation
LTspice LT3080 - LDO Linear Regulators Download 0.99 KB LTspice LT6110 - Power Monitor, Control, and Protection, LT3080 - LDO Linear Regulators Download 2.52 KB LTspice LT3080 Demo Circuit - Parallel 1.1A Single Resistor Low Dropout Regulator (12V to 3V @ 3A) Download 2.00KB LTspice LT3080 Demo Circuit - 1.1A Single Resistor Low Dropout Regulator (12V to 3V @ 1.1A) Download 1.00KB LTspice LT3080 Demo Circuit - 1.1A Single Resistor LDO Regulator (12V to 1.8V @ 1A) Download 1.00KB
Part Models 23
1ku List Price Starting From $2.20
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LT3080

Documentation

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Data Sheet

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UPDATED 09/06/2011
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LT3080: Adjustable 1.1A Single Resistor Low Dropout Regulator Data Sheet (Rev.D)

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UPDATED 10/17/2011
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LT3080: 抵抗1本で調整可能な1.1A、低損失レギュレータ データシート

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Technical Articles

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UPDATED 02/19/2015
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Three-Terminal Linear Regulator Evolution Continues Unabated redirect icon

1.00M

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UPDATED 05/28/2009
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New Applications for a New Architecture Linear Regulator redirect icon

435.00K

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UPDATED 01/21/2016
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Shutdown with the LT3080x Current Source Reference Linear Regulators redirect icon

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UPDATED 10/01/2007
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Low Dropout Regulator Can Be Directly Paralleled to Spread The Heat redirect icon

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UPDATED 05/01/2016
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1.5A, Negative Regulator Expands Family of Current-Reference Linear Regulators redirect icon

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UPDATED 08/14/2013
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New Linear Regulators Solve Old Problems redirect icon

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UPDATED 10/01/2011
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3A Linear Regulator Can Be Easily Paralleled to Spread Power and Heat redirect icon

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UPDATED 05/21/2015
Japanese
リニア電圧レギュレータを簡単に並列接続する方法 redirect icon

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UPDATED 05/21/2015
English
Paralleling Linear Regulators Made Easy redirect icon

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UPDATED 01/26/2015
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Loop Gain and its Effect on Analog Control Systems redirect icon

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UPDATED 01/26/2015
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ループ・ゲインとそのアナログ制御システムに及ぼす影響 redirect icon

User Guide

2

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UPDATED 09/24/2009
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DC995A - Demo Manual redirect icon

292.00K

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UPDATED 09/24/2009
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DC1294A - Demo Manual redirect icon

297.00K

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Application Note

7

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UPDATED 12/04/2012
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AN126 - 2-Wire Virtual Remote Sensing for Voltage Regulators - Clairvoyance Marries Remote Sensing redirect icon

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UPDATED 09/01/2019
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AN-140: Basic Concepts of Linear Regulator and Switching Mode Power Supplies redirect icon

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UPDATED 09/01/2019
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AN-140：线性调节器和开关模式电源的基本概念 redirect icon

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UPDATED 07/19/2021
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AN-2016: Using the ADuM4136 Isolated Gate Driver and LT3999 DC-to-DC Converter to Drive a 1200 V SiC Power Module redirect icon

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UPDATED 07/19/2021
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AN-2016：使用ADuM4136隔离式栅极驱动器和LT3999 DC/DC转换器 驱动1200 V SiC电源模块 redirect icon

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UPDATED 07/19/2021
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AN-2016: ADuM4136 絶縁型ゲート・ドライバと LT3999 DC/DC コンバータを使用して1200V SiC パワー・モジュールを駆動 redirect icon

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UPDATED 09/01/2019
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AN-140: リニア・レギュレータとスイッチング電源の基本概念 redirect icon

Reliability Data

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UPDATED 03/26/2018
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R531 Reliability Data redirect icon

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Design Note

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UPDATED 11/10/2022
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Design Note 431: Highly Integrated Quad 16-Bit, SoftSpan, Voltage Output DAC for Industrial and Control Applications redirect icon

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UPDATED 07/08/2014
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Design Note 529: Control the Voltage of a Remote Load Over Any Length of Copper Wire redirect icon

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UPDATED 07/08/2014
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设计要点 529: 通过任意长度的铜线控制远端负载的电压 redirect icon

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UPDATED 07/08/2014
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DN-529: 銅線の長さ制限なしで、離れた場所の負荷の電圧を制御 redirect icon

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Documentation

Technical Documents 18
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Data Sheet 1

LT3080: Adjustable 1.1A Single Resistor Low Dropout Regulator Data Sheet (Rev.D)

Reliability Data 1

R531 Reliability Data

User Guide 2

DC995A - Demo Manual
DC1294A - Demo Manual

Application Note 3

AN126 - 2-Wire Virtual Remote Sensing for Voltage Regulators - Clairvoyance Marries Remote Sensing
AN-140: Basic Concepts of Linear Regulator and Switching Mode Power Supplies
AN-2016: Using the ADuM4136 Isolated Gate Driver and LT3999 DC-to-DC Converter to Drive a 1200 V SiC Power Module

Design Note 2

Design Note 431: Highly Integrated Quad 16-Bit, SoftSpan, Voltage Output DAC for Industrial and Control Applications
Design Note 529: Control the Voltage of a Remote Load Over Any Length of Copper Wire

Technical Articles 9

Three-Terminal Linear Regulator Evolution Continues Unabated
New Applications for a New Architecture Linear Regulator
Shutdown with the LT3080x Current Source Reference Linear Regulators
Low Dropout Regulator Can Be Directly Paralleled to Spread The Heat
1.5A, Negative Regulator Expands Family of Current-Reference Linear Regulators
New Linear Regulators Solve Old Problems
3A Linear Regulator Can Be Easily Paralleled to Spread Power and Heat
Paralleling Linear Regulators Made Easy
Loop Gain and its Effect on Analog Control Systems

Solutions Bulletin & Brochure 1

Linear Low Dropout (LDO) Regulator Solutions

Product Selection Guide 1

Not Your Dad's LDO

Product Selector Card 1

New 3-Terminal Regulators Add Functionality

Video

5

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2017-09-14

Directly Parallel This High Power Density Linear Regulator - LT3080

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2017-09-18

LT3080 Video Product Brief

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2017-09-18

Synchronous Step-down Regulator with Programmable Reference

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2017-09-18

12:18

LTspice: SOAtherm Tutorial

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2017-09-18

Low Voltage Power Supplies

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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 Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3080EDD#PBF 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) external-link
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LT3080EDD#TRPBF 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) external-link
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LT3080EMS8E#PBF 8-Lead MSOP w/ EP external-link
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LT3080EMS8E#TRPBF 8-Lead MSOP w/ EP external-link
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LT3080EQ#PBF 5-Lead DD Pak external-link
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LT3080EQ#TRPBF 5-Lead DD Pak external-link
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LT3080EST#PBF 3-Lead SOT-223 external-link
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LT3080EST#TRPBF 3-Lead SOT-223 external-link
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LT3080EST#WPBF 3-Lead SOT-223 external-link
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LT3080EST#WTRPBF 3-Lead SOT-223 external-link
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LT3080ET#31PBF 5-Lead TO-220 (Flow 31) external-link
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LT3080ET#PBF 5-Lead TO-220 external-link
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LT3080IDD#PBF 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) external-link
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LT3080IDD#TRPBF 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) external-link
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LT3080IMS8E#PBF 8-Lead MSOP w/ EP external-link
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LT3080IMS8E#TRPBF 8-Lead MSOP w/ EP external-link
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LT3080IQ#PBF 5-Lead DD Pak external-link
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LT3080IQ#TRPBF 5-Lead DD Pak external-link
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LT3080IST#PBF 3-Lead SOT-223 external-link
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LT3080IST#TRPBF 3-Lead SOT-223 external-link
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LT3080IST#WPBF 3-Lead SOT-223 external-link
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LT3080IST#WTRPBF 3-Lead SOT-223 external-link
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LT3080IT#PBF 5-Lead TO-220 external-link
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Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LT3080EMS8E#PBF

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Laser Top Mark Conversion for DDPAK & TO220 Packages Assembled in ADPG. Country of Origin Code [MY] To Be Incorporated On Top Mark

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LT3080EMS8E#PBF

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PCN20_0128_Form

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Material_Report

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Aug 10, 2022

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Laser Top Mark Conversion for DDPAK & TO220 Packages Assembled in ADPG. Country of Origin Code [MY] To Be Incorporated On Top Mark

LT3080EQ#PBF

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LT3080EQ#TRPBF

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LT3080ET#31PBF

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Evaluation Kits 2

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DC995A

LT3080EDD Demo Board | Single Resistor Prog Linear Regulator, 2.3V ≤ VIN ≤ 25V, VOUT = 0.6V/1.0V/1.2V/1.5V/1.8V/2.5V/3.3V/5V @ 1.1A

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DC995A

LT3080EDD Demo Board | Single Resistor Prog Linear Regulator, 2.3V ≤ VIN ≤ 25V, VOUT = 0.6V/1.0V/1.2V/1.5V/1.8V/2.5V/3.3V/5V @ 1.1A

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DC995A
LT3080EDD Demo Board | Single Resistor Prog Linear Regulator, 2.3V ≤ VIN ≤ 25V, VOUT = 0.6V/1.0V/1.2V/1.5V/1.8V/2.5V/3.3V/5V @ 1.1A
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Product Detail

Demonstration circuit 995A is an adjustable 1.1A linear regulator featuring the LT3080. Architected as a precision current source and voltage follower, it allows this new regulator to be used in many applications requiring high current, adjustability to zero output, and no heat sink. The device brings out the collector of the pass transistor to allow low dropout operation when used with multiple supplies. The demo board's input supply voltage range is 2.3V to 25V. For proper regulation, the LT3080 has a control pin; the voltage on this pin must be 1.2V to 1.35V higher than the output voltage.The output voltage is jumper selectable and can be set to 1.8V, a value between 0V and 5V (using trimpot R2) or a user-defined value.


A key feature of the LT3080 is its wide output voltage range. By using a reference current through a single resistor, the output voltage can be programmed to any level between zero and 36V. The DC995A has a reduced input voltage 25V due to input capacitor voltage rating. The DC995A can be used as a high current linear regulator, a post regulator for switching supply,a  variable voltage supply or a low output voltage power supply.

Resources

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DC995A - Demo Manual Download

292.00K

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DC995A - Schematic Download

25.00K

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DC995A - Design File Download

522.00K

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DC1294A

LT3080EDD Demo Board | LT3080(x4), Paralleled, Single Resistor LDOs, 3.8V ≤ VIN ≤ 25V, VOUT = 3.3V @ 4.4A

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DC1294A

LT3080EDD Demo Board | LT3080(x4), Paralleled, Single Resistor LDOs, 3.8V ≤ VIN ≤ 25V, VOUT = 3.3V @ 4.4A

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DC1294A
LT3080EDD Demo Board | LT3080(x4), Paralleled, Single Resistor LDOs, 3.8V ≤ VIN ≤ 25V, VOUT = 3.3V @ 4.4A
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Product Detail

Demonstration circuit 1294A exercises four adjustable linear regulators in parallel using the LT3080. A small 20 mΩ ballast resistor is required for parallel operation. A short PCB trace can easily serve that purpose. The paralleled devices provide up to 4.4A of output current at 3.3V.


Architected as a precision current source and voltage follower, the LT3080 can be used in many applications requiring high current, adjustability to zero output, and no heat sink. The device brings out the collector of the pass transistor to allow low dropout operation when used with multiple supplies. The LT3080's output voltage can be programmed to any level between 0V and 36V; however the demo board has a reduced input voltage range from 3.8V to 25V due to the input capacitor voltage rating.


 


 


Resources

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DC1294A - Demo Manual Download

297.00K

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DC1294A - Design File Download

674.00K

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DC1294A - Schematic Download

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Evaluation Kits2

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DC995A

LT3080EDD Demo Board | Single Resistor Prog Linear Regulator, 2.3V ≤ VIN ≤ 25V, VOUT = 0.6V/1.0V/1.2V/1.5V/1.8V/2.5V/3.3V/5V @ 1.1A
evaluation kit item images

DC1294A

LT3080EDD Demo Board | LT3080(x4), Paralleled, Single Resistor LDOs, 3.8V ≤ VIN ≤ 25V, VOUT = 3.3V @ 4.4A

Tools & Simulations 1

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.

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LT3080 - LDO Linear Regulators Download

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LT6110 - Power Monitor, Control, and Protection, LT3080 - LDO Linear Regulators Download

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LT3080 Demo Circuit - Parallel 1.1A Single Resistor Low Dropout Regulator (12V to 3V @ 3A) Download

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LT3080 Demo Circuit - 1.1A Single Resistor Low Dropout Regulator (12V to 3V @ 1.1A) Download

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LT3080 Demo Circuit - 1.1A Single Resistor LDO Regulator (12V to 1.8V @ 1A) Download

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Reference Designs 10

DK-DEV-5AGXB3NES Dev Kit

Altera Arria V GX FPGA Development Kit

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Altera Arria V GX FPGA Development Kit

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  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
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Part Used 9

LTM4628 reference design link

LTM4618 reference design link

LTM4601
LTM4601-1 reference design link

LTC3855 reference design link

LTC3026 reference design link

LTC3025-1
LTC3025-2
LTC3025-3
LTC3025-4 reference design link

LT3980 reference design link

LT3080 reference design link

LT3029 reference design link

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Terasic DE10-Nano Kit

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  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
View Detailed Reference Design external link

Part Used 18

LTC1668 reference design link

LTC2497 reference design link

LTC2485 reference design link

LTC4261 reference design link

LTC4260 reference design link

LTC4245 reference design link

LTC4222 reference design link

LTC4215
LTC4215-2 reference design link

LTC4151 reference design link

LTC2990 reference design link

LTC2945 reference design link

ADV7513 reference design link

ADXL345 reference design link

LTC2308 reference design link

LT3580 reference design link

LT3080 reference design link

LTC3612 reference design link

LTC3616 reference design link

Stratix V Advanced System Development Board

Stratix V Advanced System Development Board

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  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
View Detailed Reference Design external link

Part Used 11

LT3009 reference design link

LTC3115-1 reference design link

LT3083 reference design link

LTC3615 reference design link

LT3070 reference design link

LT3022 reference design link

LT3080 reference design link

LTM4628 reference design link

LTC3612 reference design link

LTC3855 reference design link

LTM4620 reference design link

SoCKit Dev Kit

Arrow/Terasic SoCKit Development Kit

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Arrow/Terasic SoCKit Development Kit

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Arrow/Terasic SoCKit Development Kit

Circuits from the lab

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Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
View Detailed Reference Design external link

Part Used 7

LT3080 reference design link

LTC3026 reference design link

LTC3025-1
LTC3025-2
LTC3025-3
LTC3025-4 reference design link

LT3085 reference design link

LTC3614 reference design link

LTC3608 reference design link

LTC3600 reference design link

DK-SI-4SGX230N Kit

Altera Transceiver Signal Integrity Kit, Stratix IV GX Edition

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Altera Transceiver Signal Integrity Kit, Stratix IV GX Edition

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Altera Transceiver Signal Integrity Kit, Stratix IV GX Edition

Circuits from the lab

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Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
View Detailed Reference Design external link

Part Used 6

LTC2418 reference design link

LT1761 reference design link

LTC3025 reference design link

LT3080 reference design link

LTM4616 reference design link

LTM4601
LTM4601-1 reference design link

Figure 1. CN0577 Simplified Block Diagram

CN0577

Analog Front End and Digital Interface for Serial LVDS SAR ADCs

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CN0577

Analog Front End and Digital Interface for Serial LVDS SAR ADCs

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CN0577

Circuits from the lab

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Analog Front End and Digital Interface for Serial LVDS SAR ADCs

Features and Benefits

  • 18-Bit Resolution, 15 MSPS Data Acquisition System
  • Arbitrary Voltage Inputs Supported
  • All Clocking and Power Requirements are Onboard
  • FMC Connector for FPGA Interfacing
View Detailed Reference Design external link

Part Used 8

LTC2387-18 reference design link

ADR4520 reference design link

LT3080 reference design link

ADA4945-1 reference design link

LT3094 reference design link

ADN4661 reference design link

LT1931 reference design link

ADG3241 reference design link

Design & Integration Tools

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ZIP

CN0577 Design Files link icon

6.81 M

DE0 Nano SoC Dev Platform - Top View

Terasic DE0-Nano-SoC Kit / Atlas-SoC Kit

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Terasic DE0-Nano-SoC Kit / Atlas-SoC Kit

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Terasic DE0-Nano-SoC Kit / Atlas-SoC Kit

Circuits from the lab

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Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
View Detailed Reference Design external link

Part Used 3

LT3580 reference design link

LT3080 reference design link

LTC3612 reference design link

DK-DEV-5SGSMD5N DSP Dev Kit

Altera DSP Development Kit, Stratix V Edition