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Wire Loss Compensation Using a Current Referenced LDO

Wire Loss Compensation Using a Current Referenced LDO

This circuit shows a cable drop compensation circuit using a current referenced regulator, the LT3080. A precision 10μA set current, ISET, is sourced through two series connected resistors to program the output voltage for the remote load. To compensate for the load connecting cable drop requires sourcing an additional current into this resistor pair to increase the output voltage. The LT6110 provides a sourced current at the IMON pin which is also directly proportional to the current flowing to the load. This current is three times the normal IOUT current.

 


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.