External component connection check
Original Publication Date: 2002-Sep-01
Included in the Prior Art Database: 2003-Jul-23
In testing circuits with an external current generator and external feedback resistors of a typical regulator may appear problems when the high side power is turned on. In switching regulators at the start-up of the system the output voltage reaches the maximum value power VCC if the controller doesn’t have feedback of the output voltage. This is dangerous for the connected device because it couldn’t sustain this voltage. Until now, there is no voltage regulator system that checks whether the feedback resistors are connected properly. That’s why the circuit arrangement in figure 1 is suggested.