LT3086 - 40V, 2.1A Low Dropout Adjustable Linear Regulator with Monitoring and Cable Drop Compensation


  • Wide Input Voltage Range: 1.4V to 40V
  • 1 Resistor Sets Output Voltage: 0.4V to 32V
  • Output Current: 2.1A
  • ±2% Tolerance Over Line, Load and Temperature
  • Output Current Monitor: IMON = IOUT/1000
  • Temperature Monitor with Programmable Thermal Limit
  • Programmable Cable Drop Compensation
  • Parallel Multiple Devices for Higher Current
  • Dropout Voltage: 330mV
  • 1 Capacitor Soft-Starts Output and Decreases Noise
  • Low Output Noise: 40μVRMS (10Hz to 100kHz)
  • Precision, Programmable External Current Limit
  • Power Good Flag with Programmable Threshold
  • Ceramic Output Capacitors: 10μF Minimum
  • Quiescent Current in Shutdown: <1μA
  • Reverse-Battery, -Current and -Output Protection
  • Available in 5mm × 4mm 16-Lead DFN, 16-Lead TSSOP, 7-Lead DD-Pak and 7-Lead TO-220.

Typical Application

LT3086 Typical Application
LT3086 Typical Application


The LT®3086 is a multi-feature, low dropout, low noise 2.1A linear regulator that operates over a 1.4V to 40V input supply range. Dropout voltage at 2.1A is typically 330mV. One resistor sets output voltage from 0.4V to 32V. Output voltage tolerance is guaranteed to ±2% over line, load and temperature. The LT3086 is stable with ceramic output capacitors, requiring a minimum of 10μF.

The LT3086’s programmable cable drop compensation cancels output voltage errors caused by resistive connections to the load. A master/slave configuration allows paralleling of multiple devices for higher load current and heat spreading without external ballast resistor requirements.

Output current and temperature monitoring along with a power good flag provide system diagnostic and debug capability. Internal fault circuitry includes thermal shutdown and current limit with foldback. Thermal limit and current limit are also externally programmable.

Packages include the thermally enhanced 16-lead (5mm × 4mm) DFN, 16-lead TSSOP, 7-lead DD-Pak and 7-lead TO-220.


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
LT3086EDHD#PBF 5x4 DFN-16 DHD E 05-08-1707 Yes
LT3086EDHD#TRPBF 5x4 DFN-16 DHD E 05-08-1707 Yes
LT3086EFE#PBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT3086EFE#TRPBF TSSOP-16 FE E 05-08-1663 (BB) Yes
LT3086ER#PBF DDPAK-7 R E 05-08-1462 Yes
LT3086ER#TRPBF DDPAK-7 R E 05-08-1462 Yes
LT3086ET7#PBF TO-220 T7 E 05-08-1422 (Std) Yes
LT3086HFE#PBF TSSOP-16 FE H 05-08-1663 (BB) Yes
LT3086HFE#TRPBF TSSOP-16 FE H 05-08-1663 (BB) Yes
LT3086IDHD#PBF 5x4 DFN-16 DHD I 05-08-1707 Yes
LT3086IDHD#TRPBF 5x4 DFN-16 DHD I 05-08-1707 Yes
LT3086IFE#PBF TSSOP-16 FE I 05-08-1663 (BB) Yes
LT3086IFE#TRPBF TSSOP-16 FE I 05-08-1663 (BB) Yes
LT3086IR#PBF DDPAK-7 R I 05-08-1462 Yes
LT3086IR#TRPBF DDPAK-7 R I 05-08-1462 Yes
LT3086IT7#PBF TO-220 T7 I 05-08-1422 (Std) Yes
LT3086MPFE#PBF TSSOP-16 FE MP 05-08-1663 (BB) Yes
LT3086MPFE#TRPBF TSSOP-16 FE MP 05-08-1663 (BB) Yes
LT3086MPR#PBF DDPAK-7 R MP 05-08-1462 Yes
LT3086MPR#TRPBF DDPAK-7 R MP 05-08-1462 Yes
LT3086MPT7#PBF TO-220 T7 MP 05-08-1422 (Std) Yes

LT3086 Package Drawing
LT3086 Package Drawing
LT3086 Package Drawing
LT3086 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
LT3086EDHD#PBF 5x4 DFN-16 E $4.29 $3.00 Yes
LT3086EDHD#TRPBF 5x4 DFN-16 E $3.06 Yes
LT3086EFE#PBF TSSOP-16 E $4.43 $3.10 Yes
LT3086EFE#TRPBF TSSOP-16 E $3.16 Yes
LT3086ER#PBF DDPAK-7 E $4.57 $3.20 Yes
LT3086ER#TRPBF DDPAK-7 E $3.26 Yes
LT3086ET7#PBF TO-220 E $4.57 $3.20 Yes
LT3086HFE#PBF TSSOP-16 H $5.29 $3.70 Yes
LT3086HFE#TRPBF TSSOP-16 H $5.35 $3.76 Yes
LT3086IDHD#PBF 5x4 DFN-16 I $4.71 $3.30 Yes
LT3086IDHD#TRPBF 5x4 DFN-16 I $4.77 $3.36 Yes
LT3086IFE#PBF TSSOP-16 I $4.79 $3.35 Yes
LT3086IFE#TRPBF TSSOP-16 I $3.41 Yes
LT3086IR#PBF DDPAK-7 I $4.86 $3.40 Yes
LT3086IR#TRPBF DDPAK-7 I $3.46 Yes
LT3086IT7#PBF TO-220 I $4.86 $3.40 Yes
LT3086MPFE#PBF TSSOP-16 MP $5.71 $4.00 Yes
LT3086MPFE#TRPBF TSSOP-16 MP $4.06 Yes
LT3086MPR#PBF DDPAK-7 MP $5.93 $4.15 Yes
LT3086MPR#TRPBF DDPAK-7 MP $4.21 Yes
LT3086MPT7#PBF TO-220 MP $5.93 $4.15 Yes
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* 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
DC1729A LT3086 Demo Board | Low Dropout Linear Regulator, Monitoring & Cable Drop Compensation, 1.55V ≤ VIN ≤ 40V, Vout = 1.0V/1.2V/1.5V/3.3V/5V/12V @ 2.1A $175.00
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