LTC3114-1 - 40V, 1A Synchronous Buck-Boost DC/DC Converter with Programmable Output Current


  • Regulates VOUT Above, Below or Equal to VIN
  • Single Inductor
  • Wide VIN Range: 2.2V to 40V
  • Wide VOUT Range: 2.7V to 40V
  • 1A Output Current in Buck Mode
  • 0.5A Output Current, VIN = 3.6V, VOUT = 5V
  • Programmable Average Output Current
  • Up to 96% Efficiency
  • Burst Mode® Operation, 30μA No-Load IQ
  • Current Mode Control
  • 1.2MHz Ultralow Noise PWM
  • Accurate RUN Pin Threshold
  • Thermally Enhanced, 16-lead 3mm × 5mm DFN and TSSOP Packages

Typical Application

LTC3114-1 Typical Application
LTC3114-1 Typical Application


The LTC®3114-1 is a versatile, wide operating voltage range synchronous monolithic buck-boost DC/DC converter with programmable average output current. The LTC3114-1’s proprietary buck-boost PWM control circuitry delivers low noise operation across the entire operating voltage range. Current mode control ensures exceptional line and load transient responses.

Synchronous, internal MOSFET switches and pin selectable Burst Mode operation maintain high efficiency across the entire range of load current. Average output current is programmed with a standard resistor and provides the basis for wide input range, high efficiency charging systems or constant current, high efficiency LED drive. Regulator turn-on is programmable through the accurate RUN pin. Quiescent current is just 3μA in shutdown. Overtemperature protection, short-circuit protection and soft-start are integrated. The LTC3114-1 is offered in 16-lead 3mm × 5mm × 0.75mm DFN and 16 lead TSSOP (FE) packages.


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

Part Number Package Code Temp Package
LTC3114EDHC-1#PBF 5x3 DFN-16 DHC E 05-08-1706 RoHS
LTC3114EDHC-1#TRPBF 5x3 DFN-16 DHC E 05-08-1706 RoHS
LTC3114EFE-1#PBF TSSOP-16 FE E 05-08-1663 (BB) RoHS
LTC3114EFE-1#TRPBF TSSOP-16 FE E 05-08-1663 (BB) RoHS
LTC3114HDHC-1#PBF 5x3 DFN-16 DHC H 05-08-1706 RoHS
LTC3114HDHC-1#TRPBF 5x3 DFN-16 DHC H 05-08-1706 RoHS
LTC3114HFE-1#PBF TSSOP-16 FE H 05-08-1663 (BB) RoHS
LTC3114HFE-1#TRPBF TSSOP-16 FE H 05-08-1663 (BB) RoHS
LTC3114IDHC-1#PBF 5x3 DFN-16 DHC I 05-08-1706 RoHS
LTC3114IDHC-1#TRPBF 5x3 DFN-16 DHC I 05-08-1706 RoHS
LTC3114IFE-1#PBF TSSOP-16 FE I 05-08-1663 (BB) RoHS
LTC3114IFE-1#TRPBF TSSOP-16 FE I 05-08-1663 (BB) RoHS
LTC3114MPDHC-1#PBF 5x3 DFN-16 DHC MP 05-08-1706 RoHS
LTC3114MPDHC-1#TRPBF 5x3 DFN-16 DHC MP 05-08-1706 RoHS
LTC3114MPFE-1#PBF TSSOP-16 FE MP 05-08-1663 (BB) RoHS
LTC3114MPFE-1#TRPBF TSSOP-16 FE MP 05-08-1663 (BB) RoHS

LTC3114-1 Package Drawing
LTC3114-1 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
LTC3114EDHC-1#PBF 5x3 DFN-16 E $5.64 $3.95 Yes
LTC3114EDHC-1#TRPBF 5x3 DFN-16 E $4.01 Yes
LTC3114EFE-1#PBF TSSOP-16 E $5.64 $3.95 Yes
LTC3114EFE-1#TRPBF TSSOP-16 E $4.01 Yes
LTC3114HDHC-1#PBF 5x3 DFN-16 H $6.57 $4.60 Yes
LTC3114HDHC-1#TRPBF 5x3 DFN-16 H $4.66 Yes
LTC3114HFE-1#PBF TSSOP-16 H $6.57 $4.60 Yes
LTC3114HFE-1#TRPBF TSSOP-16 H $4.66 Yes
LTC3114IDHC-1#PBF 5x3 DFN-16 I $6.22 $4.35 Yes
LTC3114IDHC-1#TRPBF 5x3 DFN-16 I $4.41 Yes
LTC3114IFE-1#PBF TSSOP-16 I $6.22 $4.35 Yes
LTC3114IFE-1#TRPBF TSSOP-16 I $4.41 Yes
LTC3114MPDHC-1#PBF 5x3 DFN-16 MP $16.76 $11.73 Yes
LTC3114MPDHC-1#TRPBF 5x3 DFN-16 MP $11.79 Yes
LTC3114MPFE-1#PBF TSSOP-16 MP $16.76 $11.73 Yes
LTC3114MPFE-1#TRPBF TSSOP-16 MP $11.79 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
DC1821A LTC3114EDHC-1 Demo Board | VIN=2.7V to 40V, VOUT = 5V @ Up to 1A $175.00
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