An Output Capacitor-less Low-dropout Regulator using a Wide-range Single-stage Gain-boosted Error Amplifier and a Frequency-dependent Buffer with a Total Compensation Capacitance of 2.5 pF in 0.5 µm CMOS. - Hyeon-Ji Choi; Joo-Mi Cho; Hyo-Jin Park 002; Sung-Wan Hong (A-SSCC, 2021)

A 100-MHz 81.2% All-Paths Inductor-Connected Buck-Converter with Balanced Conduction-Losses and Continuous Path-Currents. - Joo-Mi Cho; Hyo-Jin Park 002; Hyunji Choi; Esun Baik; Jeeyoung Shin; Sung-Wan Hong (ESSCIRC, 2021)

A 18 µA Rail-to-Rail Class-AB Operational Amplifier with a High-Slew Miller Compensation (HSMC) Technique with 240% Settling Time Reduction in 0.18 µm. - Hyo-Jin Park 002; Joo-Mi Cho; Hyunji Choi; Esun Baik; Jeeyoung Shin; Sung-Wan Hong (ESSCIRC, 2021)

A 0.93-μW Single-Stage Rail-to-Rail Class AB Buffer Amplifier Improving DC gain and Slew-Rate with Different-Ratio Current-Mirrors and Positive-Feedback Loops. - Joo-Mi Cho; Hyo-Jin Park 002; Sung-Wan Hong (VLSI Circuits, 2021)

A High Slew-rate Wide-range Capacitive Load Driving Buffer Amplifier with Correlated Dual Positive Feedback Loops. - Young-Ju Oh; Hyo-Jin Park 002; Joo-Mi Cho; Hyeon-Ji Choi; Su-Min Park; Chan-Ho Lee; Esun Baik; Chan-Kyu Lee; Ho-Chan Ahn; Sung-Wan Hong (ISOCC, 2022)

A Capacitor-less LDO for Mobile Devices with Fast Transient Using High Gain Positive Feedback Loop. - Esun Baik; Hyo-Jin Park 002; Sung-Wan Hong (ISOCC, 2023)

A 1V 20.7μW Four-Stage Amplifier Capable of Driving a 4-to-12nF Capacitive Load with >1.07MHz GBW with an Improved Active Zero. - Chan-Ho Lee; Hyo-Jin Park 002; Joo-Mi Cho; Hyeon-Ji Choi; Young-Jun Jeon; Sung-Wan Hong (VLSI Technology and Circuits, 2023)

96.48% Peak-Efficiency Continuous-Current Step-Up Battery Charger (CC-SUBC) with Dual Energy-Harvesting Sources for Automotive Application. - Hyo-Jin Park 002; Joo-Mi Cho; Hyeon-Ji Choi; Chan-Ho Lee; Sung-Wan Hong (VLSI Technology and Circuits, 2023)

An Ultra-Low Power Soft-Switching Self-Oscillating SIMO Converter for Implantable Stimulation Systems. - Hyeon-Ji Choi; Chisung Bae; Yeunhee Huh; Sang Joon Kim; Seungchul Jung; Kye-Seok Yoon; Joo-Mi Cho; Hyo-Jin Park 002; Chan-Ho Lee; Su-Min Park; Esun Baik; Young-Ju Oh; et al. (IEEE Trans. Ind. Electron., 2023)

8.8 A 97.18% Peak-Efficiency Asymmetrically Implemented Dual-phase (AID) Converter with a full Voltage-Conversion Ratio (VCR) between 0-and-1. - Hyo-Jin Park 002; Joo-Mi Cho; Chan-Ho Lee; Young-Ju Oh; Hyunwoo Jeong; Jun-Hyeok Yang; Jaeseung Lee; Sung-Wan Hong (ISSCC, 2024)

A Simultaneous Energy Transferring SIBO Converter Achieving Low Ripple and High Efficiency for AMOLED Applications. - Hyo-Jin Park 002; Joo-Mi Cho; Hyeon-Ji Choi; Chan-Ho Lee; Young-Jun Jeon; Jeeyoung Shin; Woong Choi; Junwon Jeong; Sung-Wan Hong (IEEE J. Solid State Circuits, 2024)