Robust Full On-Chip CMOS Low Dropout Voltage Regulator with Active Compensation

This paper present a full on-chip and area efficient low dropout voltage regulator(LDO), exploiting the nested miller compensation with active capacitor (NMCAC) to eliminate the external capacitor and active feedback resistors to reduce the chip area. The external capacitor is removed allowing for greater power system integration for system on-chip applications. The idea has applied to stabilize a 1.6 V, 50 mA Low dropout regulator. Using the proposed techniques the regulator LDO works with a supply voltage as low as 1.8 V and provides a load current 50 mA with a dropout voltage of 200 mV and output variation 4 mV when a full load step 0-50 mA is applied. It designed in 0.18 m CMOS technology.