The LM10010 is a precision, digitally programmed device used to control the output voltage of a DC/DC converter. The LM10010 outputs a DC current inversely proportional to a 6-bit input word. This current DAC output connects to the feedback pin of a regulator in order to adjust its output voltage to a desired range and resolution set by the user. As the 6-bit word counts up, the output voltage is adjusted higher based on the setting of the feedback resistors in the converter.
This calculator helps show some of the sources of error in constructing this point of load source. The user enters the expected error from the LM10010, the regulator feedback, and resistors used to set the voltage. The spreadsheet shows the expected error from the system depending on the code and the output voltage.