This paper presents a N-type flipped voltage follower (FVF) based low-dropout (LDO) regulator to provide a clean supply for analog-mixed signal blocks. The FVF LDO has a high-speed inner loop to improve the power supply rejection at mid frequency. In order to achieve low noise, the sample-and-hold noise filter and chopper stability amplifier are designed to reduce the thermal noise and flicker noise. This work is designed and simulated in 0.18um CMOS process with 5V VIN and 2.5V VOUT. The integrated output noise of the LDO in the 10Hz to 100kHz is 6.77uVRMS and the power supply rejection is 85.05dB at 1MHz.