标签: vldo

低输出电压、低压差线性稳压器在电流和未来计算机系统中成为开关电源的替代选择。对于系统总线电压低于2.5V的应用，LT1580线性稳压器用最少的元件实现了功率转换。LT1573驱动器允许使用一个大电流PNP三极管。LT1575线性稳压器则实现了低压差、大电流应用。advertisementVeryLowDropout(VLDO)LinearRegulatorsSupplyLowVoltageOutputs……

LTC3446封装了一个高效1A升压整流器和两个300mAVLDO整流器，输出电压范围VLDO最低可至0.4V，而升压整流器可低至0.8V。输入电压囊括了单节锂离子电池电压，最大可至5.5V，使其成为多电压、2V以下输出的理想解决方案。OneICGeneratesThreeSub-2VPowerRailsfromaLi-IonCellDesignNote419FrankLeeIntroductionplications,andforpoweringlowvoltagelogicfrom5VShrinkinggeometriesinICtechnologyhavepushedtheor3.3Vrails.Theoutputvoltagerangeextendsdownoperatingvoltagesoftoday’selectronicswellbelow2V,to0.4VfortheVLDOregulatorsand0.8Vforthebuckpresentinganumberofdesignchallenges.Onecommonconverter.problemistheneedformultiplesupplyvoltages:forEachoutputisindependentlyenabledorshutdownviaexample,onevoltageforaCPUcore,anotherforI/Oand……