Products
LT3083
RECOMMENDED FOR NEW DESIGNSAdjustable 3A Single Resistor Low Dropout Regulator
- Part Models
- 22
- 1ku List Price
- Starting From $5.23
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Overview
- Outputs May be Paralleled for Higher Current and Heat Spreading
- Output Current: 3A
- Single Resistor Programs Output Voltage
- 50µA Set Pin Current: 1% Initial Accuracy
- Output Adjustable to 0V
- Low Output Noise: 40µVRMS (10Hz to 100kHz)
- Wide Input Voltage Range: 1.2V to 23V (DD-Pak and TO-220 Packages)
- Low Dropout Voltage: 310mV
- <1mV Load Regulation
- <0.001%/V Line Regulation
- Minimum Load Current: 1mA
- Stable with Minimum 10µF Ceramic Capacitor
- Current Limit with Foldback and Overtemperature Protection
- Available in 16-Lead TSSOP, 12-Lead 4mm × 4mm DFN, 5-Lead TO-220 and 5-Lead Surface Mount DD-PAK Packages
The LT3083 is a 3A low dropout linear regulator that can be paralleled to increase output current or spread heat on surface mounted boards. Architected as a precision current source and voltage follower, this new regulator finds use in many applications requiring high current, adjustability to zero, and no heat sink. The device also brings out the collector of the pass transistor to allow low dropout operation—down to 310mV—when used with multiple supplies.
A key feature of the LT3083 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 23V (DD-PAK and TO-220 packages). The LT3083 is stable with 10μF of capacitance on the output, and the IC is stable with 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 LT3083 is offered in the 16-lead TSSOP (with an exposed pad for better thermal characteristics), 12-lead 4mm × 4mm DFN (also with an exposed pad), 5-lead TO-220, and 5-lead surface mount DD-PAK packages.
Applications
- High Efficiency Linear Regulator
- Post Regulator for Switching Supplies
- Low Parts Count Variable Voltage Supply
- Low Output Voltage Power Supplies
Documentation
Data Sheet 1
User Guide 1
Technical Articles 4
Video 1
Product Selection Guide 1
Product Selector Card 1
Solutions Bulletin & Brochure 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 |
|---|---|---|---|
| LT3083EDF#PBF | 12-Lead DFN (4mm x 4mm w/ EP) | ||
| LT3083EDF#TRPBF | 12-Lead DFN (4mm x 4mm w/ EP) | ||
| LT3083EFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3083EFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT3083EQ#PBF | 5-Lead DD Pak | ||
| LT3083EQ#TRPBF | 5-Lead DD Pak | ||
| LT3083ET#PBF | 5-Lead TO-220 | ||
| LT3083IDF#PBF | 12-Lead DFN (4mm x 4mm w/ EP) | ||
| LT3083IDF#TRPBF | 12-Lead DFN (4mm x 4mm w/ EP) | ||
| LT3083IFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3083IFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT3083IQ#PBF | 5-Lead DD Pak | ||
| LT3083IQ#TRPBF | 5-Lead DD Pak | ||
| LT3083IT#40PBF | 5-Lead TO-220 (Flow 40) | ||
| LT3083IT#PBF | 5-Lead TO-220 | ||
| LT3083MPDF#PBF | 12-Lead DFN (4mm x 4mm w/ EP) | ||
| LT3083MPDF#TRPBF | 12-Lead DFN (4mm x 4mm w/ EP) | ||
| LT3083MPFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3083MPFE#TRPBF | 16-Lead TSSOP w/ EP | ||
| LT3083MPQ#PBF | 5-Lead DD Pak | ||
| LT3083MPQ#TRPBF | 5-Lead DD Pak | ||
| LT3083MPT#PBF | 5-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 |
||
| LT3083EFE#PBF | PRODUCTION | |
| LT3083EFE#TRPBF | PRODUCTION | |
| LT3083IFE#PBF | PRODUCTION | |
| LT3083IFE#TRPBF | PRODUCTION | |
| LT3083MPFE#PBF | PRODUCTION | |
| LT3083MPFE#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 |
||
| LT3083EQ#PBF | PRODUCTION | |
| LT3083EQ#TRPBF | PRODUCTION | |
| LT3083ET#PBF | PRODUCTION | |
| LT3083IQ#PBF | PRODUCTION | |
| LT3083IQ#TRPBF | PRODUCTION | |
| LT3083IT#40PBF | PRODUCTION | |
| LT3083IT#PBF | PRODUCTION | |
| LT3083MPQ#PBF | PRODUCTION | |
| LT3083MPQ#TRPBF | PRODUCTION | |
| LT3083MPT#PBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2977 | RECOMMENDED FOR NEW DESIGNS | 8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement |
| Protection Switches & Controllers 2 | ||
| LTC4370 | RECOMMENDED FOR NEW DESIGNS | Two-Supply Diode-OR Current Balancing Controller |
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
| Parts | Product Life Cycle | Description |
|---|---|---|
| LT3081 | RECOMMENDED FOR NEW DESIGNS | 1.5A Single Resistor Rugged Linear Regulator with Monitors |
Tools & Simulations
LTspice 2
- LT8614/LT3083 Demo Circuit - Hybrid Wide Dimming Ratio Linear LED Current Controller (3.4-42V to 41V @ 3A Max)
- LT3083 Demo Circuit - Single Resistor Low Dropout Regulator (10V to 6.0V@3A)
Models for the following parts are available in LTspice:
- LT3083
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
LT3083EQ Demo Board | Single Resistor Prog Low Dropout Linear Regulator, 1.7V ≤ VIN ≤ 23V, VOUT = 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V @ 3A
Resources
Reference Designs
Part Used
Part Used
