A 0-24mA, 1.2V/1.8V Dual Mode Low Dropout Regulator Design for Efficient Power Management in Battery-Powered Systems

Low drop-out (LDO) regulators are widely employed in today’s electronics industry due to their essential role as subsystems within power management units. The increasing need for mobile battery-operated products and portable devices such as laptops, mobile phones and tablets has led to a rise in the utilization of LDO regulators as integral power management modules within System on Chip (SoC) designs. LDOs are employed to safeguard sensitive analog blocks from unwanted power supply noise, leveraging their high Power Supply Rejection Ratio (PSRR) performance. The LDO is designed in tsmc180nm technology with a dual supply voltage of 1.2V/1.8V and a programmable output voltage of 1.1V/1.5V. The simulations show that the LDO exhibits a transient response with a full load current ranging from 0 to 24mA, coupled with a low dropout voltage of under 100mV/300mV, respectively. The quiescent current of the complete LDO is 225µA and the maximum load regulation of 0.34 µV/mA.