LT3083 - Adjustable 3A Single Resistor Low Dropout Regulator

Features

  • 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
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LT3083 Typical Application
LT3083 Typical Application

Description

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.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LT3083EDF#PBF 4x4 DFN-12 DF E 05-08-1733 Yes
LT3083EDF#TRPBF 4x4 DFN-12 DF E 05-08-1733 Yes
LT3083EFE#PBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT3083EFE#TRPBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT3083EQ#PBF DDPAK-5 Q E 05-08-1461 Yes
LT3083EQ#TRPBF DDPAK-5 Q E 05-08-1461 Yes
LT3083ET#PBF TO-220 T E 05-08-1421 (Standard) Yes
LT3083IDF#PBF 4x4 DFN-12 DF I 05-08-1733 Yes
LT3083IDF#TRPBF 4x4 DFN-12 DF I 05-08-1733 Yes
LT3083IFE#PBF TSSOP-16 FE I 05-08-1663 (BB) Yes
LT3083IFE#TRPBF TSSOP-16 FE I 05-08-1663 (BB) Yes
LT3083IQ#PBF DDPAK-5 Q I 05-08-1461 Yes
LT3083IQ#TRPBF DDPAK-5 Q I 05-08-1461 Yes
LT3083IT#40PBF TO-220 T I 05-08-1421 (Standard) Yes
LT3083IT#PBF TO-220 T I 05-08-1421 (Standard) Yes
LT3083IT#TRPBF TO-220 T I 05-08-1421 (Standard) Yes
LT3083MPDF#PBF 4x4 DFN-12 DF MP 05-08-1733 Yes
LT3083MPDF#TRPBF 4x4 DFN-12 DF MP 05-08-1733 Yes
LT3083MPFE TSSOP-16 FE MP 05-08-1663 (BB) No
LT3083MPFE#PBF TSSOP-16 FE MP 05-08-1663 (BB) Yes
LT3083MPFE#TRPBF TSSOP-16 FE MP 05-08-1663 (BB) Yes
LT3083MPQ DDPAK-5 Q MP 05-08-1461 No
LT3083MPQ#PBF DDPAK-5 Q MP 05-08-1461 Yes
LT3083MPQ#TR DDPAK-5 Q MP 05-08-1461 No
LT3083MPQ#TRPBF DDPAK-5 Q MP 05-08-1461 Yes
LT3083MPT#PBF TO-220 T MP 05-08-1421 (Standard) Yes
LT3083MPT#TRPBF TO-220 T MP 05-08-1421 (Standard) Yes


LT3083 Package Drawing
LT3083 Package Drawing
LT3083 Package Drawing
LT3083 Package Drawing

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
LT3083EDF#PBF 4x4 DFN-12 E $5.43 $3.80 Yes
LT3083EDF#TRPBF 4x4 DFN-12 E $3.86 Yes
LT3083EFE#PBF TSSOP-16 E $5.62 $3.93 Yes
LT3083EFE#TRPBF TSSOP-16 E $3.99 Yes
LT3083EQ#PBF DDPAK-5 E $5.90 $4.13 Yes
LT3083EQ#TRPBF DDPAK-5 E $4.19 Yes
LT3083ET#PBF TO-220 E $5.90 $4.13 Yes
LT3083IDF#PBF 4x4 DFN-12 I $6.29 $4.40 Yes
LT3083IDF#TRPBF 4x4 DFN-12 I $4.46 Yes
LT3083IFE#PBF TSSOP-16 I $6.47 $4.53 Yes
LT3083IFE#TRPBF TSSOP-16 I $4.59 Yes
LT3083IQ#PBF DDPAK-5 I $6.76 $4.73 Yes
LT3083IQ#TRPBF DDPAK-5 I $4.79 Yes
LT3083IT#40PBF TO-220 I $7.21 $5.18 Yes
LT3083IT#PBF TO-220 I $6.76 $4.73 Yes
LT3083IT#TRPBF TO-220 I $4.79 Yes
LT3083MPDF#PBF 4x4 DFN-12 MP $14.66 $10.26 Yes
LT3083MPDF#TRPBF 4x4 DFN-12 MP $10.32 Yes
LT3083MPFE TSSOP-16 MP $15.17 $10.62 No
LT3083MPFE#PBF TSSOP-16 MP $15.17 $10.62 Yes
LT3083MPFE#TRPBF TSSOP-16 MP $10.68 Yes
LT3083MPQ DDPAK-5 MP $15.94 $11.16 No
LT3083MPQ#PBF DDPAK-5 MP $15.94 $11.16 Yes
LT3083MPQ#TR DDPAK-5 MP $16.00 $11.22 No
LT3083MPQ#TRPBF DDPAK-5 MP $16.00 $11.22 Yes
LT3083MPT#PBF TO-220 MP $15.94 $11.16 Yes
LT3083MPT#TRPBF TO-220 MP $11.22 Yes
Buy NowRequest Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

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
DC1585A 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 $175.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Appications

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
LT3083IDF#PBF 4x4 DFN-12 I $6.29 $4.40 Yes
LT3083IDF#TRPBF 4x4 DFN-12 I $4.46 Yes
LT3083IFE#PBF TSSOP-16 I $6.47 $4.53 Yes
LT3083IFE#TRPBF TSSOP-16 I $4.59 Yes
LT3083MPDF#PBF 4x4 DFN-12 MP $14.66 $10.26 Yes
LT3083MPDF#TRPBF 4x4 DFN-12 MP $10.32 Yes
LT3083MPFE#PBF TSSOP-16 MP $15.17 $10.62 Yes
LT3083MPFE#TRPBF TSSOP-16 MP $10.68 Yes
Buy NowRequest Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

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

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LT3083

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