LT3791两个同步信号应该怎样理解

最好晒一下相关图

手册解释：This is the external clock synchronization input. Ground this pin for low ripple Burst Mode operation at low output loads. Tie to a clock source for synchronization, which will include pulse-skipping at low output loads. When in pulse-skipping mode, quiescent current increases to 1.5mA.
推荐处理：接地。