ADVANCE INFORMATION for pre-production products; subject to change without notice.
When the MODE/SYNC pin is low, power save mode is allowed. The device operates in PWM mode as long as the output current is higher than half of the inductor´s ripple current. To maintain high efficiency at light loads, the device enters power save mode at the boundary to discontinuous conduction mode (DCM). This happens if the output current becomes smaller than half of the inductor´s ripple current.
In power save mode the switching frequency decreases linearly with the load current maintaining high efficiency.