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LT3080
Adjustable 1.1A Single Resistor Low Dropout Regulator
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
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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
Reliability Data (1)
Application Notes (3)
User Guides (2)
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.
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Reference Designs (9)
Reference Materials
Product Selector Card (1)
Product Selection Guide (1)
Solutions Bulletins & Brochures (1)
Technical Articles (9)
LT Journal
LTspice: SOAtherm Tutorial
Synchronous Step-down Regulator with Programmable Reference
Low Voltage Power Supplies
Directly Parallel This High Power Density Linear Regulator - LT3080
LT3080 Video Product Brief
Press Releases (1)
Design Resources
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LT3080 Discussions
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