DC2358A - LTM8068 Demo Board | 2kV AC Isolated μModule Flyback with LDO, 4.5V ≤ VIN ≤ 40V, Vout1 = 5.6V @ up to 460mA, Vout2 = 5V Post-Reg LDO

The Demo Circuit 2358A is a 2kV AC isolated flyback μModule® DC/DC converter with LDO post regulator featuring the LTM8068. The demo circuit is designed for a 5.6V flyback output and a 5V post regulator output from a 4.5V to 40V input. The current capability of the 5.6V flyback output (V_OUT1) varies with input voltage from about 200mA at 4.5V_IN to about 460mA at 40V_IN. The current capability of the 5V LDO output (V_OUT2) is limited by either the V_OUT1 loading or the 300mA current limit on the LDO post regulator itself. Figure 1 in the demo manual shows the maximum output current on V_OUT1 when V_OUT2 is not loaded, and V_OUT2 when V_OUT1 is unloaded.

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
- LTM8068 Demo Circuit - 2kVAC Isolated Low Noise µModule Regulator with Post LDO Regulator (4.5-40V to 5.6V @ 460mA, 5V @ 300mA)
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

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