LT3080 - Adjustable 1.1A Single Resistor Low Dropout Regulator
Features
- 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 data available for specific packages
Typical Application
Description
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 |
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT3080EDD#PBF | 3x3 DFN-8 | DD | E | 05-08-1698 | Yes |
| LT3080EDD#TRPBF | 3x3 DFN-8 | DD | E | 05-08-1698 | Yes |
| LT3080EMS8E#PBF | MS-8 | MS8 | E | 05-08-1660 | Yes |
| LT3080EMS8E#TRPBF | MS-8 | MS8 | E | 05-08-1660 | Yes |
| LT3080EQ#PBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT3080EQ#TRPBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT3080EST#PBF | SOT-223 | ST | E | 05-08-1630 | Yes |
| LT3080EST#TRPBF | SOT-223 | ST | E | 05-08-1630 | Yes |
| LT3080ET#31PBF | TO-220 | T | E | 05-08-1421 (Standard) | Yes |
| LT3080ET#PBF | TO-220 | T | E | 05-08-1421 (Standard) | Yes |
| LT3080IDD#PBF | 3x3 DFN-8 | DD | I | 05-08-1698 | Yes |
| LT3080IDD#TRPBF | 3x3 DFN-8 | DD | I | 05-08-1698 | Yes |
| LT3080IMS8E#PBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LT3080IMS8E#TRPBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LT3080IQ#PBF | DDPAK-5 | Q | I | 05-08-1461 | Yes |
| LT3080IQ#TRPBF | DDPAK-5 | Q | I | 05-08-1461 | Yes |
| LT3080IST#PBF | SOT-223 | ST | I | 05-08-1630 | Yes |
| LT3080IST#TRPBF | SOT-223 | ST | I | 05-08-1630 | Yes |
| LT3080IT#PBF | TO-220 | T | I | 05-08-1421 (Standard) | Yes |
| LT3080IT#TRPBF | TO-220 | T | I | 05-08-1421 (Standard) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT3080EDD#PBF | 3x3 DFN-8 | E | $2.69 | $1.88 | Yes | |
| LT3080EDD#TRPBF | 3x3 DFN-8 | E | $2.75 | $1.94 | Yes | |
| LT3080EMS8E#PBF | MS-8 | E | $2.77 | $1.94 | Yes | |
| LT3080EMS8E#TRPBF | MS-8 | E | $2.00 | Yes | ||
| LT3080EQ#PBF | DDPAK-5 | E | $3.14 | $2.20 | Yes | |
| LT3080EQ#TRPBF | DDPAK-5 | E | $2.32 | Yes | ||
| LT3080EST#PBF | SOT-223 | E | $2.59 | $1.81 | Yes | |
| LT3080EST#TRPBF | SOT-223 | E | $1.87 | Yes | ||
| LT3080ET#31PBF | TO-220 | E | $3.50 | $2.60 | Yes | |
| LT3080ET#PBF | TO-220 | E | $3.14 | $2.20 | Yes | |
| LT3080IDD#PBF | 3x3 DFN-8 | I | $3.09 | $2.16 | Yes | |
| LT3080IDD#TRPBF | 3x3 DFN-8 | I | $2.21 | Yes | ||
| LT3080IMS8E#PBF | MS-8 | I | $3.19 | $2.23 | Yes | |
| LT3080IMS8E#TRPBF | MS-8 | I | $2.29 | Yes | ||
| LT3080IQ#PBF | DDPAK-5 | I | $3.62 | $2.53 | Yes | |
| LT3080IQ#TRPBF | DDPAK-5 | I | $2.59 | Yes | ||
| LT3080IST#PBF | SOT-223 | I | $2.97 | $2.08 | Yes | |
| LT3080IST#TRPBF | SOT-223 | I | $2.14 | Yes | ||
| LT3080IT#PBF | TO-220 | I | $3.62 | $2.53 | Yes | |
| LT3080IT#TRPBF | TO-220 | I | $2.59 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1294A | LT3080EDD Demo Board | LT3080(x4), Paralleled, Single Resistor LDOs, 3.8V ≤ VIN ≤ 25V, Vout = 3.3V @ 4.4A | $150.00 | |
| DC995A | LT3080EDD Demo Board | Single Resistor Prog Linear Regulator, 2.3V ≤ VIN ≤ 25V, Vout = 0.6V/1.0V/1.2V/1.5V/1.8V/2.5V/3.3V/5V @ 1.1A | $75.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT3080IDD#PBF | 3x3 DFN-8 | I | $3.09 | $2.16 | Yes | |
| LT3080IDD#TRPBF | 3x3 DFN-8 | I | $2.21 | Yes | ||
| LT3080IMS8E#PBF | MS-8 | I | $3.19 | $2.23 | Yes | |
| LT3080IMS8E#TRPBF | MS-8 | I | $2.29 | Yes | ||
| LT3080IST#PBF | SOT-223 | I | $2.97 | $2.08 | Yes | |
| LT3080IST#TRPBF | SOT-223 | I | $2.14 | Yes | ||
| Buy Now • Request Samples | ||||||
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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Design Tools
LTspice
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Models for the following parts are available in LTspice:
LT3080
LT3080-1
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
