A current comparison based capacitor-less LDO without voltage reference is proposed. The output voltage was converted to current and compared with reference current, so the voltage reference was thus omitted. In addition, an additional gain stage was adopted to enhance the gains and the resolution was improved. An error amplifier with a source feedback compensation network was inserted into the loop to increase the loop gain and thus improve accuracy, and to maintain loop stability over a wide load range while reducing on-chip compensation capacitance. The proposed LDO was simulated in a SMIC 65 nm CMOS process. The stimulation results show that when the load capacitor is 100 pF, the quiescent current is 9.4 μA, the compensation capacitor is only 0.25 pF, the recovery time is less than 1 μs when the load current is switched between 100 μA and 50 mA, and the overshot and undershot voltage of the LDO with (without) active feedback circuit is 131 mV (94 mV) and 99 mV (21 mV), which is reduced by 28% and 79% respectively..