Characterization and sample testing of the LHC4913 positive voltage regulator for the LHCb Silicon Tracker

In this note, we report on a characterization of the LHC4913 positive voltage regulator. We tested the behaviour on different cable types and their influence on the voltage regulation and possible oscillations. Furthermore, sample testing of the production batch for the LHCb Silicon Tracker subdetector has been performed for a cable representative to a Silicon Tracker installation with a load comparable to the front-end hybrid power consumption.