An External Capacitor-Less Low-Dropout Voltage Regulator Using a Transconductance Amplifier. - Hua Fan 001; Xiaopeng Diao; Yongkai Li; Kaifei Fang; Hao Wen; Dagang Li 002; Kelin Zhang; Yuanjun Cen; Dainan Zhang; Quanyuan Feng; Hadi Heidari (IEEE Trans. Circuits Syst. II Express Briefs, 2019)