LT3080
Adjustable 1.1A Single Resistor Low Dropout Regulator
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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 Categories
Markets and Technologies
Product Lifecycle
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
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R531 Reliability Data3/26/2018
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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 Module7/19/2021
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AN-140: Basic Concepts of Linear Regulator and Switching Mode Power Supplies9/1/2019
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AN126 - 2-Wire Virtual Remote Sensing for Voltage Regulators - Clairvoyance Marries Remote Sensing12/4/2012
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DC995A - Demo Manual9/24/2009
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DC1294A - Demo Manual9/24/2009
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Not Your Dad's LDO7/12/2011
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1.5A, Negative Regulator Expands Family of Current-Reference Linear Regulators5/1/2016 LT Journal
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Shutdown with the LT3080x Current Source Reference Linear Regulators1/21/2016
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Paralleling Linear Regulators Made Easy5/21/2015
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Three-Terminal Linear Regulator Evolution Continues Unabated2/19/2015
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Loop Gain and its Effect on Analog Control Systems1/26/2015
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New Linear Regulators Solve Old Problems8/14/2013 LT Journal
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3A Linear Regulator Can Be Easily Paralleled to Spread Power and Heat10/1/2011 LT Journal
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New Applications for a New Architecture Linear Regulator5/28/2009
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Low Dropout Regulator Can Be Directly Paralleled to Spread The Heat10/1/2007 LT Journal
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LTspice: SOAtherm Tutorial12/1/2021 -
Synchronous Step-down Regulator with Programmable Reference10/15/2018 -
Low Voltage Power Supplies10/15/2018 -
Directly Parallel This High Power Density Linear Regulator - LT308010/15/2018 -
LT3080 Video Product Brief10/15/2018
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.
Models for the following parts are available in LTspice:
LT3080
LT3080-1
Reference Designs (10)
Product Recommendations
LT3080 Companion 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.
PCN-PDN Information
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Support & Discussions
LT3080 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku 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 Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.