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

Features

  • 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

Description

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.

Packaging

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

DFN-10, MS-10

LTC3103 Package Drawing
LTC3103 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC3103EDD#PBF DFN 10 E $3.50 $2.45 View
LTC3103EDD#TRPBF DFN 10 E $2.51 View
LTC3103EMSE#PBF MSOP 10 E $3.50 $2.45 View
LTC3103EMSE#TRPBF MSOP 10 E $2.51 View
LTC3103IDD#PBF DFN 10 I $3.86 $2.70 View
LTC3103IDD#TRPBF DFN 10 I $2.76 View
LTC3103IMSE#PBF MSOP 10 I $3.86 $2.70 View
LTC3103IMSE#TRPBF MSOP 10 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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Click here to view our complete list of demo boards

Applications

  • Remote Sensor Networks
  • Distributed Power Systems
  • Multicell Battery or SuperCap Regulator
  • Energy Harvesters
  • Portable Instruments
  • Low Power Wireless Systems

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Design Tools

LTspiceIV

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice IV

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As". After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice IV:
LTC3103

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