LT3759 - Wide Input Voltage Range Boost/SEPIC/Inverting Controller


  • Wide VIN Range: 1.6V to 42V
  • Positive or Negative Output Voltage Programming with a Single Feedback Pin
  • PGOOD Output Voltage Status Report
  • Accurate 50mV SENSE Threshold Voltage
  • Programmable Soft-Start
  • Programmable Operating Frequency (100kHz to 1MHz) with One External Resistor
  • Synchronizable to an External Clock
  • Low Shutdown Current < 1μA
  • INTVCC Regulator Supplied from VIN or DRIVE
  • Programmable Input Undervoltage Lockout with Hysteresis

Typical Application

LT3759 Typical Application
LT3759 Typical Application


The LT®3759 is a wide input range, current mode, DC/DC controller which is capable of regulating either positive or negative output voltages from a single feedback pin. It can be configured as a boost, SEPIC or inverting converter.

The LT3759 drives a low side external N-channel power MOSFET. An internal LDO regulator draws power from VIN or DRIVE to provide up to a 4.75V supply for the gate driver. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. The operating frequency of LT3759 can be set over a 100kHz to 1MHz range with an external resistor, or can be synchronized to an external clock using the SYNC pin.

The LT3759 features soft-start and frequency foldback functions to limit inductor current during start-up and output short-circuit. A window comparator on the FBX pin reports via the PGOOD pin, providing output voltage status indication. The device is available in a 12-Lead exposed pad MSOP package.


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

Part Number Package Code Temp Package
LT3759EMSE#PBF MS-12E MSE E 05-08-1666 RoHS
LT3759EMSE#TRPBF MS-12E MSE E 05-08-1666 RoHS
LT3759HMSE#PBF MS-12E MSE H 05-08-1666 RoHS
LT3759HMSE#TRPBF MS-12E MSE H 05-08-1666 RoHS
LT3759IMSE#PBF MS-12E MSE I 05-08-1666 RoHS
LT3759IMSE#TRPBF MS-12E MSE I 05-08-1666 RoHS

LT3759 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
LT3759EMSE#PBF MS-12E E $3.36 $2.35 Yes
LT3759EMSE#TRPBF MS-12E E $2.41 Yes
LT3759HMSE#PBF MS-12E H $4.11 $2.88 Yes
LT3759HMSE#TRPBF MS-12E H $2.94 Yes
LT3759IMSE#PBF MS-12E I $3.62 $2.53 Yes
LT3759IMSE#TRPBF MS-12E I $2.59 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
DC1725A LT3759EMSE Boost Demo Board | VIN = 1.8V to 4.5V, V OUT = 5V @ 2A $150.00
DC1787A LT3759EMSE SEPIC Demo Board | VIN = 2.8V to 36V, VOUT = 12V @ 1A $150.00
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Click here to view our complete list of demo boards


  • Datacom and Industrial Boost, SEPIC and Inverting Converters
  • Distributed Power Supplies
  • Portable Electronic Equipment
  • Automotive

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