This regulator circuit presented in this schematic is a simple low power regulator based on the ADP120 regulator chip manufactured by Analog Devices . The ADP120 linear regulator chip is ideal for low power applications like : mobile phones , digital camera , portable audio devices , portable and battery-powered equipment .
The schematic of these ADP120 linear regulator is very simple an require few external components .
Input voltage range of the ADP120 is between 2.3 V to 5.5 V and the maximum Output voltage range is between 1.2 V to 3.3 V . The ADP120 is available in output voltages of 1.2 V , 1,5 V , 1,8 V , 2,5 V , 2,8 V , 3 V and 3.3 V.
The maximum output current delivered by ADP120 is around 100mA .
Other features of the ADP120 low power linear regulator are : low quiescent current IGND = 11 μA with zero load IGND = 22 μA with 100 mA load , low shutdown current: <1 μA , low dropout voltage 60 mV @ 100 mA load , High PSRR 73 dB @ 1 kHz at VOUT = 1.2 V 70 dB @ 10 kHz at VOUT = 1.2 V , low noise: 40 μV rms at VOUT = 1.2 V , no noise bypass capacitor required , initial accuracy: ±1% , Stable with small 1 μF ceramic output capacitor , current-limit and thermal overload protection .