SNVS872D August 2012 – August 2018 LMZ21700
Using long input wires to connect the supply to the input of any converter adds impedance in series with the input supply. This impedance can cause a voltage drop at the VIN pin of the converter when the output of the converter is loaded. If the input voltage is near the minimum operating voltage, this added voltage drop can cause the converter to drop out or reset. If long wires are used during testing, TI recommends adding some bulk (for example, electrolytic) capacitance at the input of the converter.