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

DC857A - LT3481EMSE/EDD Demo Board | 2 Circuits, Integrated Boost Diode, 4.5V ≤ VIN ≤ 34V, Vout1 = 5V @ 2A; and 8.5V ≤ VIN ≤ 22V, Vout2 = 3.3V @ 2A

Demonstration circuit 857 features the LT3481EMSE and LT3481EDD in two stepdown converter circuits, one configured for high efficiency and the other for small size. The high  efficiency circuit switching at 800kHz is designed for 3.3V / 2A output from a 4.5V to 34V input. The small size circuit switching at 2MHz demonstrates the LT3481’s ability to operate with a small inductor and output capacitor. It is designed for 5V output from an 8.5V to 22V input. The wide input range of the LT3481 allows a variety of input sources. The typical sources are automotive batteries, wall adaptors and industrial supplies. The current mode control scheme creates fast transient response and good loop stability. In addition, the LT3481’s integrated boost diode reduces the parts count. The low ripple Burst Mode® Operation of LT3481 not only allows the circuit to have high efficiency over a broad current range but also provides the low output ripple at light load conditions.

DC857A - 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.

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