LT3080-1
Parallelable 1.1A Adjustable Single Resistor Low Dropout Regulator
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Overview
Features and Benefits
- 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 × 3mm DFN
Product Details
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 |
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 (1)
Documentation & Resources
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R531 Reliability Data3/26/2018
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DC1368A - Demo Manual9/24/2009
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 (9)
Product Recommendations
LT3080-1 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-1#PBF | Material Declaration | Reliability Data | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | |
| LT3080EDD-1#TRPBF | Material Declaration | Reliability Data | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | |
| LT3080EMS8E-1#PBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| LT3080EMS8E-1#TRPBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| LT3080IDD-1#PBF | Material Declaration | Reliability Data | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | |
| LT3080IDD-1#TRPBF | Material Declaration | Reliability Data | 8-Lead DFN (3mm x 3mm x 0.75mm w/ EP) | |
| LT3080IMS8E-1#PBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| LT3080IMS8E-1#TRPBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| Wafer Fabrication Data | R531 Reliability Data |
PCN-PDN Information
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Support & Discussions
LT3080-1 Discussions
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Buy Now Pricing
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List Pricing
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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.