LT3081
LT3081
RECOMMENDED FOR NEW DESIGNS1.5A Single Resistor Rugged Linear Regulator with Monitors
- Part Models
- 21
- 1ku List Price
- Starting From $3.98
Viewing:
Overview
- Extended Safe Operating Area
- Maximum Output Current: 1.5A
- Stable with or without Input/Output Capacitors
- Wide Input Voltage Range: 1.2V to 36V
- Single Resistor Sets Output Voltage
- Output Current Monitor: IMON = IOUT/5000
- Junction Temperature Monitor: 1μA/°C
- Output Adjustable to 0V
- 50μA SET Pin Current: 1% Initial Accuracy
- Output Voltage Noise: 27μVRMS
- Parallel Multiple Devices for Higher Current or Heat Spreading
- Programmable Current Limit
- Reverse-Battery and Reverse-Current Protection
- <1mV Load Regulation Typical Independent of VOUT
- <0.001%/V Line Regulation Typical
- Available in Thermally-Enhanced 12-Lead 4mm × 4mm DFN and 16-Lead TSSOP, 7-Lead DD-Pak and 7-Lead TO-220
The LT3081 is a 1.5A low dropout linear regulator designed for rugged industrial applications. Key features of the IC are the extended safe operating area (SOA), output current monitor, temperature monitor and programmable current limit. The LT3081 can be paralleled for higher output current or heat spreading. The device withstands reverse input and reverse output-to-input voltages without reverse current flow.
The LT3081’s precision 50μA reference current source allows a single resistor to program output voltage to any level between zero and 34.5V. The current reference architecture makes load regulation independent of output voltage. The LT3081 is stable with or without input and output capacitors.
The output current monitor (IOUT/5000) and die junction temperature output (1μA/°C) provide system monitoring and debug capability. In addition, a single resistor programs current limit.
Internal protection circuitry includes reverse-battery and reverse-current protection, current limiting and thermal limiting. The LT3081 is offered in the 16-lead TSSOP (with exposed pad for improved thermal performance), 7-lead TO-220, 7-lead DD-Pak, and an 12-lead 4mm × 4mm DFN.
Applications
- All Surface Mount Power Supply
- Rugged Industrial Power Supply
- Post Regulator for Switching Supplies
- Low Output Voltage Supply
- Intrinsic Safety Applications
Documentation
Data Sheet 1
User Guide 2
Technical Articles 6
Video 3
Brochure 2
Product Selector Card 2
Analog Dialogue 1
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 |
|---|---|---|---|
| LT3081EDF#PBF | 12-Lead DFN (4mm x 4mm w/ EP) | ||
| LT3081EDF#TRPBF | 12-Lead DFN (4mm x 4mm w/ EP) | ||
| LT3081EFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3081EFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT3081ER#PBF | 7-Lead DD Pak | ||
| LT3081ER#TRPBF | 7-Lead DD Pak | ||
| LT3081ET7#06PBF | 7-Lead TO-220 (Flow 06) | ||
| LT3081ET7#PBF | 7-Lead TO-220 | ||
| LT3081HFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3081HFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT3081HT7#PBF | 7-Lead TO-220 | ||
| LT3081IDF#PBF | 12-Lead DFN (4mm x 4mm w/ EP) | ||
| LT3081IDF#TRPBF | 12-Lead DFN (4mm x 4mm w/ EP) | ||
| LT3081IFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3081IFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT3081IR#PBF | 7-Lead DD Pak | ||
| LT3081IR#TRPBF | 7-Lead DD Pak | ||
| LT3081IT7#PBF | 7-Lead TO-220 | ||
| LT3081MPFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3081MPFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT3081MPT7#PBF | 7-Lead TO-220 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LT3081EFE#PBF | PRODUCTION | |
| LT3081EFE#TRPBF | PRODUCTION | |
| LT3081HFE#PBF | PRODUCTION | |
| LT3081HFE#TRPBF | PRODUCTION | |
| LT3081IFE#PBF | PRODUCTION | |
| LT3081IFE#TRPBF | PRODUCTION | |
| LT3081MPFE#PBF | PRODUCTION | |
| LT3081MPFE#TRPBF | PRODUCTION | |
|
Aug 10, 2022 - 22_0175 Laser Top Mark Conversion for DDPAK & TO220 Packages Assembled in ADPG. Country of Origin Code [MY] To Be Incorporated On Top Mark |
||
| LT3081ER#PBF | PRODUCTION | |
| LT3081ER#TRPBF | PRODUCTION | |
| LT3081ET7#06PBF | PRODUCTION | |
| LT3081ET7#PBF | PRODUCTION | |
| LT3081HT7#PBF | PRODUCTION | |
| LT3081IR#PBF | PRODUCTION | |
| LT3081IR#TRPBF | PRODUCTION | |
| LT3081IT7#PBF | PRODUCTION | |
| LT3081MPT7#PBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
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| Hot Swap Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
| Ideal Diodes and PowerPath Controllers 1 | ||
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| Parts | Product Life Cycle | Description |
|---|---|---|
| LT3080 | RECOMMENDED FOR NEW DESIGNS | Adjustable 1.1A Single Resistor Low Dropout Regulator |
Tools & Simulations
LTspice 3
- LT3081 Demo Circuit - Wide Safe Operating Area Supply (2.7-40V to 1.5V @ 1.5A)
- LT3081/LT8612/LTC3632/LT3092 Demo Circuit - Constant Voltage, Constant Current Bench Supply (10-40V to 0-25V @ 0-3.1A)
- LT3081 Demo Circuit - Wide Safe Operating Area Supply Using Paralleling Regulators (2.7-40V to 1.5V @ 3A)
Models for the following parts are available in LTspice:
- LT3081
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.
Evaluation Kits
Reference Designs
75 Watt, Single-Output Benchtop Power Supply