A Research And Design Of High-performance Low Dropout Linear Regulator

In recent years, along with the rapid development of the electronic industry, electronicproducts for the performance requirements higher than before, and electronic product functionmore complex, which objectively demands of electronic product battery performance is better.Because of your battery capacity is limited. Low dropout voltage linear regulators can prolongbattery's life, and it is very good at power supply ripple suppression ability. It also can beintegrated into the chip to supply power to key module. This paper designs a LDO supply powerto PLL module in SOC applications.This paper introduces the development status, then introduce the basic knowledge of linearregulators and the main performance indexes. Next, on the main LDO linear regulators twoparameters: stability and PSRR. Provide theoretical guidance for circuit design. Every moduleLDO principle analysis and gives practical circuit implementation. Including the band-gapvoltage references, the error amplifier, and limited flow, and protect circuit simulation results.Finally, show the whole LDO's simulation results.This LDO is designed on the basis of SMIC 65nM standard CMOS process, the frontsimulation verified by Spectre. The maximum output current is 30 mA. It's liner regulation is0.014%/mA and load regulation is 0.014%/mA are achieved. It's PSRR is -104.9dB in DC. It hasgood performance in PSRR.