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Solutions DC Regulator Solutions DC-DC Voltage Regulation Step Down DC-DC Solutions (Vin > Vout)
Solutions Power Management Switching Regulator Step-Down (Buck) Regulators Internal Power Switch Buck
Solutions Power Management Switching Regulator Step-Down (Buck) Regulators High Input Voltage Buck
Solutions Space & Harsh Environment Extended Temperature Plastic (H & MP) Extended Temperature (H & MP) Switching Regulators

DC1820A-A - LTC3646 Demo Board (MSOP) | 4V ≤ VIN ≤ 40V, Vout = 3.3V or 5V @ 1A

Demonstration circuit 1820A-A is a DC/DC converter demo board using the LTC3646 monolithic synchronous buck regulator in the exposed pad MSOP package. The input voltage range is from 4V to 40V. The output voltage range of LTC3646 is 2V to 30V. It can deliver up to 1A of output current. At light load conditions, DC1820A can operate in Burst Mode® operation to improve the efficiency. The user can choose to use internal or external compensation. The switching frequency of LTC3646 is programmable from 200kHz to 3MHz. It can be synchronized to an external clock through the MODE/SYNC pin.

DC1820A-A - Schematic

 


Software

LTspice

LTspice® software 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

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
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice 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.

LTpowerCAD

The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD

To open the project file for this circuit:

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

View More Step Down DC-DC Solutions (Vin > Vout) Solutions

LTC3646-1 Demo Board (DFN) | 4V ≤ VIN ≤ 40V, Vout = 3.3V or 5V @ 1A
LTC3774EUHE Demo Board | Sync Buck Controller, 4-Phase (LTC3774 x2), 10V ≤ VIN ≤ 14V, Vout = 1.2V @ 120A

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