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DC1848A - LT3976 Demo Board I Buck with 3.3µA Iq, 4.3V ≤ VIN ≤ 40V, Vout = 3.3V @ 5A

Demonstration circuit 1848A is a monolithic step-down DC/DC switching regulator featuring the LT3976. The LT3976 is a compact, high efficiency, high speed monolithic stepdown switching regulator that consumes only 3.3μA of quiescent current. The demo circuit is designed for 3.3V, 5A output from a 4.3V to 40V input. The switching frequency can be programmed either via oscillator resistor or external clock up to 2MHz. To synchronize to an external clock, move JP2 to SYNC and apply the external clock to the SYNC turret.

DC1848A - Schematic




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.