DC-DC switching converter with positive and negative outputs for active-matrix LCD bias. - Hyunseok Nam; Inseok Kim; Youngkook Ahn; Jeongjin Roh (IET Circuits Devices Syst., 2010)

A Multiphase Buck Converter With a Rotating Phase-Shedding Scheme For Efficient Light-Load Control. - Youngkook Ahn; Inho Jeon; Jeongjin Roh (IEEE J. Solid State Circuits, 2014)

8.9 A 96.5% Peak Efficiency Duty-Independent DC-DC Step-Up Converter with Low Input-Level Voltage Stress and Mode-Adaptive Inductor Current Reduction. - Minsu Kim; Woojoong Jung; Hyunjun Park; Junho Song; Youngkook Ahn; Taekyu Nam; Yoonsoo Shin; Young-Jin Woo; Hyung-Min Lee (ISSCC, 2024)