LM2984T ,Microprocessor Power Supply Systemfeatures three inde-pendent and tracking outputs capable of delivering the n Output current in exce ..
LM2990S-12 ,Negative Low Dropout RegulatorApplications- Post switcher regulator - Local, on-card, regulation - Battery operated equipment 2MI ..
LM2990S-15 ,Negative Low Dropout RegulatorApplications- Post switcher regulator - Local, on-card, regulation - Battery operated equipment 2MI ..
LM2990S-15 ,Negative Low Dropout RegulatorFEATURES SECTIONoProcessing Subgrp Description Temp ( C)MIL-STD-883, Method 5004 1 Static tests ..
LM2990S-5.0 ,Negative Low Dropout RegulatorFeatures- 5% output accuracy over entire operating range - Output current in excess of 1A - Dropout ..
LM2990S-5.0/NOPB ,Negative Low Dropout Regulator 3-DDPAK/TO-263 -40 to 125Features 3 DescriptionThe LM2990 is a three-terminal, low-dropout, 1-A1• Input Voltage: –26 V to –6 ..
LM9022 ,Vacuum Fluorescent Display Filament DriverGeneral Description Key Specificationsn I during shutdown 0.6µA (typ)The LM9022 is a bridged power ..
LM9022M ,Vacuum Fluorescent Display Filament DriverGeneral Description Key Specificationsn I during shutdown 0.6µA (typ)The LM9022 is a bridged power ..
LM9036M-3.3 ,Ultra-Low Quiescent Current Voltage Regulatorfeaturesn Dropout voltage typically 200mV @ I = 50mAOUTthat are common to low dropout regulators in ..
LM9036M-5.0 ,Ultra-Low Quiescent Current Voltage Regulatorfeatures GND OUT= 0.1mA)low dropout voltage and low current in the standby mode.Withlessthan25µAGro ..
LM9036MM-3.3 ,Ultra-Low Quiescent Current Voltage RegulatorElectrical Characteristics - LM9036-5.0V = 14V, I = 10 mA, T = 25˚C, unless otherwise specified. Bo ..
LM9036MM-5.0 ,Ultra-Low Quiescent Current Voltage RegulatorElectrical Characteristics - LM9036-5.0V = 14V, I = 10 mA, T = 25˚C, unless otherwise specified. Bo ..
LM2984T
Microprocessor Power Supply System
LM2984
Microprocessor Power Supply System
General DescriptionThe LM2984 positive voltage regulator features three inde-
pendent and tracking outputs capableof deliveringthe
powerfor logic circuits, peripheral sensors and standby
memoryin atypical microprocessor system.The LM2984in-
cludescircuitry which monitorsboth itsown high-currentout-
put and alsoan externalμP.If any error conditionsare
sensedin either,a reset errorflagissetand maintained until
the malfunction terminates. Since these functionsarein-
cludedinthe same package withthe three regulators,a
great savingin board spacecanbe realized inthe typicalmi-
croprocessor system. The LM2984 also features verylow
dropout voltageson eachofits three regulator outputs (0.6Vthe rated output current). Furthermore,the quiescentcur-
rentcanbe reducedto1mAinthe standby mode.
Designed alsoforvehicular applications, theLM2984andall
regulated circuitryare protected from reverse battery instal-
lationsor 2-battery jumps. Familiar regulator features such short circuitand thermal overloadprotectionare alsopro-
vided. Fixedoutputsof5V areavailablein theplastic TO-220
power package.
Features Threelow dropout tracking regulators Output currentin excessof500mA Fully specifiedfor −40˚Cto +125˚C operation Low quiescent current standby regulator Microprocessor malfunction RESETflag Delayed RESETon power-up Accurate pretrimmed5V outputs Reverse battery protection Overvoltage protection Reverse transient protection Short circuit protection Internal thermal overload protection ON/OFF switchfor high current outputsP+ Product Enhancement tested
Typical Application CircuitDS011252-1
COUT mustbeatleast10μFto maintain stability.Maybe increased withoutboundto maintain regulationduring transients. Locateascloseas possibletothe regulator.This capacitor mustberatedoverthe same operating temperature rangeasthe regulator.The equivalent series resistance (ESR)ofthis
capacitoris critical;see curve.
Order Number LM2984T
SeeNS Package Number TA11BApril 1998
LM2984
Microprocessor
Power
Supply
System©1998NationalSemiconductor Corporation DS011252
