ADP123 Datasheet | Analog Devices

Data Sheet 5.5 V Input, 300 m A, Low Quiescent Current, CMOS Linear Regulator ADP122/ADP123 Features Input voltage supply range: 2.3 V to 5.5 V 300 m A maximum output current Fixed and adjustable output voltage versions Very low dropout voltage: 85 m V at 300 m A 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 d B at 100 k Hz Excellent load/line transient response Optimized for small 1.0 μF ceramic capacitors Current limit and thermal overload protection Logic controlled enable pact 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 m A of output current. The low 85 m V dropout voltage at a 300 m A 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 adjustable version of the device and allows the output voltage to be set between 0.8 V and 5.0 V by an external voltage divider. The ADP122/ADP123 are specifically designed for stable operation with tiny 1 µF ceramic input and output capacitors to meet the requirements of high performance, space constrained applications. TYPICAL APPLICATION CIRCUITS VIN = 2.3V TO 5.5V CIN 1µF 1 VIN VOUT 5 ADP122 2 GND VOUT = 1.8V COUT 1µF 08399-001 ON OFF 3 EN NC 4 Figure 1. ADP122 with Fixed Output...