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              1. "
                L4805-L4885-L4892
                L4808-L4810-L4812
                March1992
                VERYLOWDROPVOLTAGEREGULATORS
                .
                INPUT/OUTPUTDROPTYP.0.4V
                .
                400mAOUTPUTCURRENT
                .
                LOWQUIESCENTCURRENT
                .
                REVERSEPOLARITYPROTECTION
                .
                OVERVOLTAGEPROTECTION(
                ±
                60V)
                .
                FOLDBACKCURRENTLIMITING
                .
                THERMALSHUTDOWN
                TO-220
                DESCRIPTION
                L4800seriesdevicesarevoltageregulatorswitha
                verylowvoltagedrop(typically0.4Vatfullratedcur-
                rent),outputcurrentupto400mA,lowquiescent
                currentandcomprehensiveon-chipprotection.The-
                sedevicesareprotectedagainstloaddumpand
                fielddecaytransientsof
                ±
                60V,polarityreversaland
                overheating.Afoldbackcurrentlimiterprotects
                againstloadshortcircuits.Availablein5V,8.5V,
                9.2V,10Vand12Vversions(all
                ±
                4%,T
                I
                =25
                °
                C)the-
                seregulatorsaredesignedforautomotive,industrial
                andconsumerapplicationswherelowconsumption
                isparticularlyimportant.
                BLOCKDIAGRAM
                InautomotiveapplicationstheL4805isidealfor5V
                logicsuppliesbecauseitcanoperateevenwhenthe
                batteryvoltagefallsbelow6V.Inbatterybackupand
                standbyapplicationsthelowconsumptionofthese
                devicesextendsbatterylife.
                SOT-82
                1/7
                9uu