LT3065 Series - 45V VIN, 500mA Low Noise, Linear Regulator with Programmable Current Limit and Power Good


  • Input Voltage Range: 1.8V to 45V
  • Output Current: 500mA
  • Dropout Voltage: 300mV
  • Programmable Precision Current Limit: ±10%
  • Power Good Flag
  • Low Noise: 25μVRMS (10Hz to 100kHz)
  • Adjustable Output (VREF = VOUT(MIN) = 600mV)
  • Output Tolerance: ±2% Over Line, Load and Temperature
  • Stable with Low ESR, Ceramic Output Capacitors (3.3μF Minimum)
  • Single Capacitor Soft-Starts Reference and Lowers Output Noise
  • Current Limit Foldback Protection
  • Shutdown Current: <1μA
  • Reverse Battery and Thermal Limit Protection
  • 10-Lead 3mm × 3mm DFN and 12-lead MSOP Packages

Typical Application

LT3065 Typical Application
LT3065 Typical Application


The LT®3065 Series are micropower, low noise, low dropout voltage (LDO) linear regulators that operate over a 1.8V to 45V input voltage range. The devices supply 500mA of output current with a typical dropout voltage of 300mV. A single external capacitor provides programmable low noise reference performance and output soft-start functionality.

A single external resistor programs the LT3065’s current limit, accurate to ±10% over a wide input voltage and temperature range. A PWRGD flag indicates output regulation.

The LT3065 optimizes stability and transient response with low ESR ceramic capacitors, requiring a minimum of 3.3μF. Internal protection circuitry includes current limiting with foldback, thermal limiting, reverse battery protection, reverse current protection and reverse output protection.

The LT3065 is available in fixed output voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5V, and as an adjustable device with an output voltage range from 0.6V to 40V. The LT3065 is available in the thermally-enhanced 10-lead 3mm × 3mm DFN and 12-lead MSOP packages.


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

DFN-10, MS-12

LT3065 Package Drawing
LT3065 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3065EDD#PBF DFN 10 E $2.64 $1.85 View
LT3065EDD#TRPBF DFN 10 E $1.91 View
LT3065EMSE#PBF MSOP 12 E $2.64 $1.85 View
LT3065EMSE#TRPBF MSOP 12 E $1.91 View
LT3065HDD#PBF DFN 10 H $3.43 $2.40 View
LT3065HDD#TRPBF DFN 10 H $2.46 View
LT3065HMSE#PBF MSOP 12 H $3.43 $2.40 View
LT3065HMSE#TRPBF MSOP 12 H $2.46 View
LT3065IDD#PBF DFN 10 I $3.00 $2.10 View
LT3065IDD#TRPBF DFN 10 I $2.17 View
LT3065IMSE#PBF MSOP 12 I $3.00 $2.10 View
LT3065IMSE#TRPBF MSOP 12 I $2.16 View
LT3065MPDD#PBF DFN 10 MP $7.22 $5.05 View
LT3065MPDD#TRPBF DFN 10 MP $5.11 View
LT3065MPMSE#PBF MSOP 12 MP $7.22 $5.05 View
LT3065MPMSE#TRPBF MSOP 12 MP $5.11 View
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
DC2072A LT3065 Demo Board | Low Noise Linear Regulator, Prog Current Limit, 5.35V ≤ VIN ≤ 45V, Vout = 1.2V to 5V @ 500mA . Contact Factory
Buy Now
Click here to view our complete list of demo boards


  • Battery-Powered Systems
  • Automotive Power Supplies
  • Industrial Power Supplies
  • Avionic Power Supplies
  • Portable Instruments

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email with questions and comments.

Design Tools


LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice IV

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As". After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice IV:

Technical Support