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

In portable mobile devices, the capacitor-less low-dropout regulator (LDO) is in great demand as a power management unit to achieve complete on-chip design [1] –[6]. In the capacitor-less LDO, it is important to achieve two things: good load/line regulations and a fast transient response.