REG1118

® REG 1118 REG1118 800mA Low Dropout Positive Regulator with Current Source and Sink Capability FEATURES q SOURCES 800mA, SINKS 400mA q 2.85V OUTPUT FOR SCSI ACTIVE NEGATION TERMINATION q 1.3V max DROPOUT VOLTAGE AT IO = 800mA q INTERNAL CURRENT LIMIT q THERMAL OVERLOAD PROTECTION q SOT-223 SURFACE MOUNT PACKAGE DESCRIPTION The REG1118-2.85 is a three-terminal voltage regulators capable of sourcing up to 800mA and sinking up to 400mA. The sinking capability is important in SCSI applications where active negation line drivers are used. The REG1118-2.85 is useful for making a 27-line Boulay terminator capable of interfacing with active negation drivers required in FAST-20 SCSI applications. The regulator has active current limits for both sink and source currents as well as internal thermal limiting. Laser trimming assures excellent output voltage accuracy. An NPN output stage allows output stage drive current to contribute to the source load current for maximum efficiency. REG1118 is packaged in a SOT-223 surface-mount package, suitable for reflow soldering techniques. APPLICATIONS q SCSI-2 AND SCSI-3 DEVICES q FAST-20 SCSI q ACTIVE NEGATION SCSI TERMINATORS q SUPPLY SPLITTER GROUND GENERATION 110Ω Signal Line 1 110Ω Signal Line 2 TERMPWR REG1118 VIN 10µF GND VOUT 4.7µF 110Ω Signal Line N 110Ω Signal Line 3 Up To 27 Lines User Supplied Resistor Network REG1118-2.85 Used to Make Active Negation SCSI Terminator InternationalAirportIndustrialPark MailingAddress:POBox1140...