ADIADP125低靜態(tài)電流線性電源解決方案

1、ADI ADP125低靜態(tài)電流線性電源解決方案關(guān)鍵詞：電源管理,DC/DC轉(zhuǎn)換器,線性電源,LDOADI公司的ADP125是5.5V輸入500mA輸出電流的低靜態(tài)電流CMOS線性電源穩(wěn)壓器,輸入電壓從2.3V到5.5V,500A電流時(shí)的壓降為130mV,有固定輸出和可調(diào)輸出兩種型號(hào),可調(diào)輸出從0.8 V 到 5.0 V,100kHz的PSRR為60dB，主要用在數(shù)碼相機(jī)和音頻設(shè)備，手持設(shè)備，自動(dòng)讀表(AMR),GPS和本地管理單元，醫(yī)療設(shè)備和POL本文介紹了ADP125主要特性，ADP124/ADP125方框圖，應(yīng)用電路以及ADP124/ADP125評(píng)估板電路圖和材料清單5.5 V Input

2、, 500 mA, Low Quiescent Current, CMOS Linear RegulatorsThe 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

3、 improves efficiency and allows operation over a wide input voltage range.The low 210 A 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 v

4、ersion 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 ADP124/ADP125 are specifically designed for stable operation with tiny 1 F ceramic input and output capacitors to meet the requirements of high performance, space constrained appli

5、cations.The ADP124/ADP125 have an internal soft start that gives a constant start-up time of 350 s. Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions. The ADP124/ADP125 are available in 8-lead exposed paddle MSOP and LFCSP packages. When compared

6、with the standard MSOP and LFCSP packages, the exposed paddle MSOP and LFCSP packages have lower thermal resistance (JA). The lower thermal resistance package allows the ADP124/ ADP125 to meet the needs of a variety of portable applications while minimizing the rise in junction temperature.ADP125主要特

7、性:Input voltage supply range: 2.3 V to 5.5 V500 mA maximum output currentFixed and adjustable output voltage versions1% initial accuracyUp to 31 fixed-output voltage options available from 1.75 V to 3.3 VAdjustable-output voltage range from 0.8 V to 5.0 VVery low dropout voltage: 130 mVLow quiescent

8、 current: 45 ALow shutdown current: 1 AExcellent PSRR performance: 60 dB at 100 kHzExcellent load/line transient responseOptimized for small 1.0 F ceramic capacitorsCurrent limit and thermal overload protectionLogic controlled enableCompact 8-lead exposed paddle MSOP and LFCSP packagesADP125應(yīng)用:Digit

9、al camera and audio devicesPortable and battery-powered equipmentAutomatic meter reading (AMR) metersGPS and location management unitsMedical instrumentationPoint of load power圖1.ADP124內(nèi)部方框圖(固定輸出)圖2.ADP125內(nèi)部方框圖(可調(diào)輸出)ADP124/ADP125評(píng)估板評(píng)估板主要特性:Input voltage range: 2.3 V to 5.5 VOutput current range: 0 mA to 500 mAOutput voltage accuracy: 1%AO-Electronics 傲壹電子 官網(wǎng)： 中文網(wǎng)：Operat