LT3790 - 60V Synchronous 4-Switch Buck-Boost Controller


  • 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
  • Synchronous Switching: Up to 98.5% Efficiency
  • Wide VIN Range: 4.7V to 60V
  • 2% Output Voltage Accuracy: 1.2V ≤ VOUT < 60V
  • 6% Output Current Accuracy: 0V ≤ VOUT < 60V
  • Input and Output Current Regulation with Current Monitor Outputs
  • No Top FET Refresh in Buck or Boost
  • VOUT Disconnected from VIN During Shutdown
  • C/10 Charge Termination and Output Shorted Flags
  • Capable of 100W or greater per IC
  • Easy Parallel Capability to Extend Output Power
  • 38-Lead TSSOP with Exposed Pad

Typical Application

LT3790 Typical Application
LT3790 Typical Application


The LT®3790 is a synchronous 4-switch buck-boost voltage/ current regulator controller. The LT3790 can regulate output voltage, output current, or input current with input voltages above, below, or equal to the output voltage. The constant-frequency, current mode architecture allows its frequency to be adjusted or synchronized from 200kHz to 700kHz. No top FET refresh switching cycle is needed in buck or boost operation. With 60V input, 60V output capability and seamless transitions between operating regions, the LT3790 is ideal for voltage regulator, battery/ super-capacitor charger applications in automotive, industrial, telecom, and even battery-powered systems.

The LT3790 provides input current monitor, output current monitor, and various status flags, such as C/10 charge termination and shorted output flag.


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

Part Number Package Code Temp Package
LT3790EFE#PBF TSSOP-38 FE E 05-08-1772 Yes
LT3790EFE#TRPBF TSSOP-38 FE E 05-08-1772 Yes
LT3790HFE#PBF TSSOP-38 FE H 05-08-1772 Yes
LT3790HFE#TRPBF TSSOP-38 FE H 05-08-1772 Yes
LT3790IFE#PBF TSSOP-38 FE I 05-08-1772 Yes
LT3790IFE#TRPBF TSSOP-38 FE I 05-08-1772 Yes
LT3790MPFE#PBF TSSOP-38 FE MP 05-08-1772 Yes
LT3790MPFE#TRPBF TSSOP-38 FE MP 05-08-1772 Yes

LT3790 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
LT3790EFE#PBF TSSOP-38 E $6.79 $4.75 Yes
LT3790EFE#TRPBF TSSOP-38 E $4.81 Yes
LT3790HFE#PBF TSSOP-38 H $7.86 $5.50 Yes
LT3790HFE#TRPBF TSSOP-38 H $5.56 Yes
LT3790IFE#PBF TSSOP-38 I $7.50 $5.25 Yes
LT3790IFE#TRPBF TSSOP-38 I $5.31 Yes
LT3790MPFE#PBF TSSOP-38 MP $21.07 $14.75 Yes
LT3790MPFE#TRPBF TSSOP-38 MP $14.81 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
DC2123A LT3790 Demo Board | Sync Buck-Boost, 12V ≤ VIN ≤ 57V, Vout = 24V @ Up to 5A $200.00
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Click here to view our complete list of demo boards


  • Automotive, Telecom, Industrial Systems
  • High Power Battery-Powered System

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Design Tools


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