7.4.1 Light Load Operation for VDDQ Buck and VPP Buck

When the load is light on the VDDQ or VPP output, the buck enters pulse skip mode after the inductor current crosses zero. This is the Eco-mode™ which improves the efficiency at light load with a lower switching frequency. Each switching cycle is followed by a period of energy saving sleep time. The sleep time ends when the VDDQSNS or VPPSNS voltage falls below the Eco-mode™ threshold voltage. As the output current decreases, the period time between switching pulses increases.