LTC3779 - 150V VIN and VOUT Synchronous 4-Switch Buck-Boost Controller
Datasheet Documentation
Reliability Data
Product Selector Card
Demo Board Manual
Press Release


Typical Application

LTC3779 Typical Application
LTC3779 Typical Application


The LTC®3779 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The constant frequency current mode architecture allows a phaselockable frequency of up to 600kHz, while an input/output constant current loop provides support for battery charging. 

With a wide 4.5V to 150V input and output range and seamless transfers between operating regions, the LTC3779 is ideal for automotive, telecom and batterypowered systems. 

The LTC3779 features a precision 1.2V reference and power good output indicator. The MODE pin can select between pulse-skipping mode or forced continuous mode of operation. Pulse-skipping mode offers high efficiency at light load while forced continuous mode operates at a constant frequency for noise sensitive applications. The PLLIN pin allows the IC to be synchronized to an external clock. The SS pin ramps the output voltage during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions.



LTC3779 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
LTC3779HFE#PBF TSSOP 38 H $9.93 $6.95
LTC3779HFE#TRPBF TSSOP 38 H $9.99 $7.01
LTC3779EFE#PBF TSSOP 38 E $8.50 $5.95
LTC3779IFE#TRPBF TSSOP 38 I $9.49 $6.66
LTC3779IFE#PBF TSSOP 38 I $9.43 $6.60
LTC3779EFE#TRPBF TSSOP 38 E $8.56 $6.01
* 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
DC2456A LTC3779EFE Demo Board | 16V ≤ VIN ≤ 120V, VOUT = 48V @ 10A at up to 99% Efficiency $275.00