LT3081 - 1.5A Single Resistor Rugged Linear Regulator with Monitors

Features

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


Typical Application

LT3081 Typical Application
LT3081 Typical Application

Description

The LT®3081 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.

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
LT3081EDF#PBF 4x4 DFN-12 DF E 05-08-1733 Yes
LT3081EDF#TRPBF 4x4 DFN-12 DF E 05-08-1733 Yes
LT3081EFE#PBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT3081EFE#TRPBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT3081ER#PBF DDPAK-7 R E 05-08-1462 Yes
LT3081ER#TRPBF DDPAK-7 R E 05-08-1462 Yes
LT3081ET7#06PBF TO-220 T7 E 05-08-1422 (Flow 06) Yes
LT3081ET7#PBF TO-220 T7 E 05-08-1422 (Standard) Yes
LT3081HFE#PBF TSSOP-16 FE H 05-08-1663 (BB) Yes
LT3081HFE#TRPBF TSSOP-16 FE H 05-08-1663 (BB) Yes
LT3081IDF#PBF 4x4 DFN-12 DF I 05-08-1733 Yes
LT3081IDF#TRPBF 4x4 DFN-12 DF I 05-08-1733 Yes
LT3081IFE#PBF TSSOP-16 FE I 05-08-1663 (BB) Yes
LT3081IFE#TRPBF TSSOP-16 FE I 05-08-1663 (BB) Yes
LT3081IR#PBF DDPAK-7 R I 05-08-1462 Yes
LT3081IR#TRPBF DDPAK-7 R I 05-08-1462 Yes
LT3081IT7#PBF TO-220 T7 I 05-08-1422 (Standard) Yes
LT3081MPFE#PBF TSSOP-16 FE MP 05-08-1663 (BB) Yes
LT3081MPFE#TRPBF TSSOP-16 FE MP 05-08-1663 (BB) Yes
LT3081MPT7#PBF TO-220 T7 MP 05-08-1422 (Standard) Yes


LT3081 Package Drawing
LT3081 Package Drawing
LT3081 Package Drawing
LT3081 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
LT3081EDF#PBF 4x4 DFN-12 E $3.71 $2.60 Yes
LT3081EDF#TRPBF 4x4 DFN-12 E $2.66 Yes
LT3081EFE#PBF TSSOP-16 E $3.82 $2.67 Yes
LT3081EFE#TRPBF TSSOP-16 E $2.73 Yes
LT3081ER#PBF DDPAK-7 E $4.10 $2.87 Yes
LT3081ER#TRPBF DDPAK-7 E $2.93 Yes
LT3081ET7#06PBF TO-220 E $4.10 $2.87 Yes
LT3081ET7#PBF TO-220 E $4.10 $2.87 Yes
LT3081HFE#PBF TSSOP-16 H $4.86 $3.40 Yes
LT3081HFE#TRPBF TSSOP-16 H $3.46 Yes
LT3081IDF#PBF 4x4 DFN-12 I $4.27 $2.99 Yes
LT3081IDF#TRPBF 4x4 DFN-12 I $3.05 Yes
LT3081IFE#PBF TSSOP-16 I $4.39 $3.07 Yes
LT3081IFE#TRPBF TSSOP-16 I $3.13 Yes
LT3081IR#PBF DDPAK-7 I $4.71 $3.30 Yes
LT3081IR#TRPBF DDPAK-7 I $3.36 Yes
LT3081IT7#PBF TO-220 I $4.71 $3.30 Yes
LT3081MPFE#PBF TSSOP-16 MP $10.29 $7.20 Yes
LT3081MPFE#TRPBF TSSOP-16 MP $7.26 Yes
LT3081MPT7#PBF TO-220 MP $11.06 $7.74 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
DC1870A LT3081EFE Demo Board | Single Resistor Rugged Linear Regulator with Monitors, 2.8V ≤ VIN ≤ 36V, Vout = 1.2V/1.5V/1.8V/2.5V/3.3V/5V/12V @ 1.5A $150.00
DC2132A 24V 3A Constant Voltage, Constant Current Bench Supply Featuring LT3081, LT8612, LT3092 $200.00
Buy Now
Click here to view our complete list of demo boards

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
LT3081HFE#PBF TSSOP-16 H $4.86 $3.40 Yes
LT3081HFE#TRPBF TSSOP-16 H $3.46 Yes
LT3081IFE#PBF TSSOP-16 I $4.39 $3.07 Yes
LT3081IFE#TRPBF TSSOP-16 I $3.13 Yes
LT3081MPFE#PBF TSSOP-16 MP $10.29 $7.20 Yes
LT3081MPFE#TRPBF TSSOP-16 MP $7.26 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

  • All Surface Mount Power Supply
  • Rugged Industrial Power Supply
  • Post Regulator for Switching Supplies
  • Low Output Voltage Supply
  • Intrinsic Safety Applications

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