ADP122

Data Sheet 5.5 V Input, 300 mA, Low Quiescent Current, CMOS Linear Regulator ADP122/ADP123 FEATURES Input voltage supply range: 2.3 V to 5.5 V 300 mA maximum output current Fixed and adjustable output voltage versions Very low dropout voltage: 85 mV at 300 mA load Low quiescent current: 45 µA at no load Low shutdown current: <1 µA Initial accuracy: ±1% accuracy Up to 31 fixed-output voltage options available from 1.75 V to 3.3 V Adjustable-output voltage range 0.8 V to 5.0 V (ADP123) Excellent PSRR performance: 60 dB at 100 kHz Excellent load/line transient response Optimized for small 1.0 μF ceramic capacitors Current limit and thermal overload protection Logic controlled enable Compact packages: 5-lead TSOT and 6-lead 2 mm × 2 mm LFCSP APPLICATIONS Digital camera and audio devices Portable and battery-powered equipment Automatic meter reading (AMR) meters GPS and location management units Medical instrumentation Point-of-sale equipment GENERAL DESCRIPTION The ADP122/ADP123 are low quiescent current, low dropout linear regulators. They are designed to operate from an input voltage between 2.3 V and 5.5 V and to provide up to 300 mA of output current. The low 85 mV dropout voltage at a 300 mA load improves efficiency and allows operation over a wide input voltage range. The low 170 μA of quiescent current at full load makes the ADP122 ideal for battery-operated portable equipment. The ADP122 is capable of 31 fixed output voltages from 1.75 V to 3.3 V. The ADP123 is the adju...