In a time-sharing current sense circuit for a multi-phase converter, a common
transconductive amplifier is selectively connected to the channels of the converter
power stage by a plurality of first switches under the control of a set of control
clocks to detect the channel current of a selected channel among the channels so
as to generate a sense current, and a sense current generated by the common transconductive
amplifier from the sensed channel current is switched by a plurality of second
switches under the control of the same control clocks to connect to one of a plurality
of sampling-and-holding circuits each corresponding to one of the channels to generate
a current sense signal to modulate the channel current of the selected channel.