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類型：開關三極管

型號:lm2596(lm2596s-3.3/5.0/12/adj, lm2596sx-3.3/5.0/12/adj 等多種尾數）

封裝：to-263/to-220

品牌：ns

數量：

lm2596描述：

simpleswitcher
powerconverter150khz
3astep-downvoltageregulator

generaldescription
thelm2596seriesofregulatorsaremonolithicintegrated
circuitsthatprovidealltheactivefunctionsforastep-down
(buck)switchingregulator,capableofdrivinga3aloadwith
excellentlineandloadregulation.thesedevicesareavail-
ableinfixedoutputvoltagesof3.3v,5v,12v,andanadjust-
ableoutputversion.
requiringaminimumnumberofexternalcomponents,these
regulatorsaresimpletouseandincludeinternalfrequency
?
compensation
,andafixed-frequencyoscillator.
thelm2596seriesoperatesataswitchingfrequencyof
150khzthusallowingsmallersizedfiltercomponentsthan
whatwouldbeneededwithlowerfrequencyswitchingregu-
lators.availableinastandard5-leadto-220packagewith
severaldifferentleadbendoptions,anda5-leadto-263
surfacemountpackage.
astandardseriesofinductorsareavailablefromseveral
differentmanufacturersoptimizedforusewiththelm2596
series.thisfeaturegreatlysimplifiesthedesignof
switch-modepowersupplies.
!
otherfeaturesincludeaguaranteed
4%toleranceonout-
putvoltageunderspecifiedinputvoltageandoutputload
!
conditions,and
15%ontheoscillatorfrequency.external
shutdownisincluded,featuringtypically80??astandbycur
rent.selfprotectionfeaturesincludeatwostagefrequency
reducingcurrentlimitfortheoutputswitchandanover
temperatureshutdownforcompleteprotectionunderfault
conditions.