LT8312 - Boost Controller with Power Factor Correction


  • PFC Boost with Minimum Number of External Components
  • VIN and VOUT Limited Only by External Components
  • Active Power Factor Correction
  • Low Harmonic Distortion
  • Overvoltage Protection
  • Energy Star Compliant (<0.5W No-Load Operation)
  • 16-Lead MSOP Package

Typical Application

LT8312 Typical Application
LT8312 Typical Application


The LT®8312 is a power factor correction (PFC) boost controller. A LT8312-based design can achieve a power factor of greater than 0.99 by actively modulating the input current, allowing compliance with most Harmonic Current Emission requirements.

The LT8312 is well suited for a wide variety of off-line applications. The input range can be scaled up or down, depending mainly on the choice of external components. Efficiencies higher than 95% can be achieved with output power levels up to 250W.


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
LT8312EMS#PBF MS-16 MS E 05-08-1669 Yes
LT8312EMS#TRPBF MS-16 MS E 05-08-1669 Yes
LT8312HMS#PBF MS-16 MS H 05-08-1669 Yes
LT8312HMS#TRPBF MS-16 MS H 05-08-1669 Yes
LT8312IMS#PBF MS-16 MS I 05-08-1669 Yes
LT8312IMS#TRPBF MS-16 MS I 05-08-1669 Yes
LT8312MPMS#PBF MS-16 MS MP 05-08-1669 Yes
LT8312MPMS#TRPBF MS-16 MS MP 05-08-1669 Yes

LT8312 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
LT8312EMS#PBF MS-16 E $3.22 $2.25 Yes
LT8312EMS#TRPBF MS-16 E $2.31 Yes
LT8312HMS#PBF MS-16 H $4.11 $2.88 Yes
LT8312HMS#TRPBF MS-16 H $2.94 Yes
LT8312IMS#PBF MS-16 I $3.70 $2.59 Yes
LT8312IMS#TRPBF MS-16 I $2.65 Yes
LT8312MPMS#PBF MS-16 MP $10.07 $7.05 Yes
LT8312MPMS#TRPBF MS-16 MP $7.11 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
DC2104A LT8312EMS Demo Board | Boost Controller with PFC, 90VAC ≤ VIN ≤ 265VAC; VOUT = 400Vdc @ 0.375A $200.00
Buy Now
Click here to view our complete list of demo boards


  • Industrial
  • Aviation

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® software 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

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
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice 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:

Technical Support