ZHCSJQ1D November 2010 – April 2019 UCD90160
PRODUCTION DATA.
Margining is used in product validation testing to verify that the complete system works properly over all conditions, including minimum and maximum power-supply voltages, load range, ambient temperature range, and other relevant parameter variations. Margining can be controlled over PMBus using the OPERATION command or by configuring two GPIO pins as margin-EN and margin-UP/DOWN inputs. The MARGIN_CONFIG command in the UCD90xxx Sequencer and System Health Controller PMBus Command Reference describes different available margining options, including ignoring faults while margining and using closed-loop margining to trim the power-supply output voltage one time at power up.