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 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 2 A Maximum Load Current Capable 0-to-1 μF Off-chip Capacitor N-type LDO using Dual Dynamic Negative Feedback Loop and an Improved Error Amplifier. - Ho-Chan Ahn; Joo-Mi Cho; Hyeon-Ji Choi; Chan-Ho Lee; Chan-Kyu Lee; Sung-Wan Hong (ESSCIRC, 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)

8.7 A 92.7% Peak Efficiency 12V-to-60V Input to 1.2V Output Hybrid DC-DC Converter Based on a Series-Parallel-Connected Switched Capacitor. - Hyeon-Ji Choi; Chan-Ho Lee; Young-Jun Jeon; Hyeonho Park; Jeong-Hun Kim; Young-Jin Woo; Ju-Pyo Hong; Haifeng Jin; 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)