ADI ADP125低静态电流线性电源解决方案

ADI公司的ADP125是5.5V输入500mA输出电流的低静态电流CMOS线性电源稳压器,输入电压从2.3V到5.5V,500A电流时的压降为130mV,有固定输出和可调输出两种型号,可调输出从0.8 V 到 5.0 V,100kHz的PSRR为60dB，主要用在数码相机和音频设备，手持设备，自动读表(AMR),GPS和本地管理单元，医疗设备和POL．本文介绍了ADP125主要特性，ADP124/ADP125方框图，应用电路以及ADP124/ADP125评估板电路图和材料清单．

5.5 V Input, 500 mA, Low Quiescent Current, CMOS Linear Regulators

The ADP124/ADP125 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 500 mA of output current. The low 130 mV dropout voltage at a 500 mA load improves efficiency and allows operation over a wide input voltage range.

The low 210 μA of quiescent current with a 500 mA load makes the ADP124/ADP125 ideal for battery-operated portable equipment.

The ADP124 is capable of 31 fixed-output voltages from 1.75 V to 3.3 V. The ADP125 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.
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