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The LTC7891 is a high performance, step-down, dc-to-dc switching regulator controller that drives all N-channel synchronous gallium nitride (GaN) field...
LTC7891 on Analog.com
Is there any possibility to control the output current? E.g. to limit the output current to low value than maximum possible output current.
This will be dependent on the load. When setting the maximum possible output current, the converter will be able to supply steadily from no load to full load.