LTC3103 - 1.8μA Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter


  • Ultralow Quiescent Current: 1.8μA
  • Synchronous Rectification: Efficiency Up to 95%
  • Wide VIN Range: 2.5V to 15V
  • Wide VOUT Range: 0.6V to 13.8V
  • 300mA Output Current
  • User-Selectable Automatic Burst Mode® or Forced Continuous Operation
  • Accurate and Programmable RUN Pin Threshold
  • 1.2MHz Fixed Frequency PWM
  • Internal Compensation
  • Power Good Status Output for VOUT
  • Available in Thermally Enhanced 3mm × 3mm × 0.75mm, 10-Pin DFN and 10-Pin MSOP Packages

Typical Application

LTC3103 Typical Application
LTC3103 Typical Application


The LTC®3103 is a high efficiency, monolithic synchronous step-down converter using a current mode architecture capable of supplying 300mA of output current.

The LTC3103 offers two operational modes: automatic Burst Mode operation and forced continuous mode allowing the user the ability to optimize output voltage ripple, noise and light load efficiency. With Burst Mode operation enabled, the typical DC input supply current at no load drops to 1.8μA maximizing the efficiency for light loads. Selection of forced continuous mode provides very low noise constant frequency, 1.2MHz operation.

Additionally, the LTC3103 includes an accurate RUN comparator, thermal overload protection, a power good output and an integrated soft-start feature to guarantee that the power system start-up is well controlled.


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

Part Number Package Code Temp Package
LTC3103EDD#PBF 3x3 DFN-10 DD E 05-08-1699 RoHS
LTC3103EDD#TRPBF 3x3 DFN-10 DD E 05-08-1699 RoHS
LTC3103EMSE#PBF MS-10E MSE E 05-08-1664 RoHS
LTC3103EMSE#TRPBF MS-10E MSE E 05-08-1664 RoHS
LTC3103IDD#PBF 3x3 DFN-10 DD I 05-08-1699 RoHS
LTC3103IDD#TRPBF 3x3 DFN-10 DD I 05-08-1699 RoHS
LTC3103IMSE#PBF MS-10E MSE I 05-08-1664 RoHS
LTC3103IMSE#TRPBF MS-10E MSE I 05-08-1664 RoHS

LTC3103 Package Drawing
LTC3103 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Temp Price
LTC3103EDD#PBF 3x3 DFN-10 E $3.50 $2.45 View
LTC3103EDD#TRPBF 3x3 DFN-10 E $2.51 View
LTC3103EMSE#PBF MS-10E E $3.50 $2.45 View
LTC3103EMSE#TRPBF MS-10E E $2.51 View
LTC3103IDD#PBF 3x3 DFN-10 I $3.86 $2.70 View
LTC3103IDD#TRPBF 3x3 DFN-10 I $2.76 View
LTC3103IMSE#PBF MS-10E I $3.86 $2.70 View
LTC3103IMSE#TRPBF MS-10E I $2.76 View
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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
DC1883A LTC3103EDD Demo Board I 2.5 ≤ VIN ≤ 15V, VOUT = 1.8V @ 300mA $100.00
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  • Remote Sensor Networks
  • Distributed Power Systems
  • Multicell Battery or SuperCap Regulator
  • Energy Harvesters
  • Portable Instruments
  • Low Power Wireless Systems

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