Attention to Internet Explorer users: ROHM website does not recommend browsing in IE 11. Please use latest browser to ensure the best performance on ROHM website.
The efficiency improvement under light loading may be due to operation in which switching is skipped, or to discontinuous operation in which the current flowing in the inductor is discontinuous. Pulse-skipping operation begins when the load current falls to roughly 1/2 or less of the inductor ripple current IL.