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LM2586S-12 |LM2586S12NSN/a2105avaiSIMPLE SWITCHER 3-Amp Flyback Regulator
LM2586S-3.3 |LM2586S33NSN/a80avaiSIMPLE SWITCHER 3-Amp Flyback Regulator
LM2586S-5.0 |LM2586S50NSN/a4avaiSIMPLE SWITCHER 3-Amp Flyback Regulator
LM2586S-ADJ |LM2586SADJNSN/a256avaiSIMPLE SWITCHER 3-Amp Flyback Regulator
LM2586SX-12 |LM2586SX12NSN/a2352avaiSIMPLE SWITCHER 3-Amp Flyback Regulator
LM2586SX-ADJ |LM2586SXADJNSN/a390avaiSIMPLE SWITCHER 3-Amp Flyback Regulator
LM2586T-ADJ |LM2586TADJNSN/a2000avaiSIMPLE SWITCHER 3-Amp Flyback Regulator


LM2586SX-12 ,SIMPLE SWITCHER 3-Amp Flyback RegulatorApplicationsOther
LM2586SX-ADJ ,SIMPLE SWITCHER 3-Amp Flyback Regulatorapplications. The device is available in 4n NPN output switches 3.0A, can stand off 65Vdifferent ou ..
LM2586T-ADJ ,SIMPLE SWITCHER 3-Amp Flyback Regulatorfeatures include soft start mode to reduce in-rush cur-rent during start up, and current mode contr ..
LM2587S-12 ,SIMPLE SWITCHER® 5A Flyback RegulatorElectrical CharacteristicsSpecifications with standard type face are for T = 25˚C, and those in bol ..
LM2587S-5.0 ,SIMPLE SWITCHER® 5A Flyback RegulatorFeaturesn Requires few external componentsThe LM2587 series of regulators are monolithic integrated ..
LM2587S-ADJ ,SIMPLE SWITCHER® 5A Flyback RegulatorLM2587 SIMPLE SWITCHER 5A Flyback RegulatorFebruary 2004LM2587®SIMPLE SWITCHER 5A Flyback Regulator
LM4835MTEX ,Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable GainFeaturesand a selectable gain or bass boost, making it optimallyn PC98 Compliantsuitedformultimedia ..
LM4835MTX ,Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable GainGeneral Description Key Specificationsn P at 1% THD+NThe LM4835 is a monolithic integrated circuit ..
LM4836LQ ,Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input MuxApplicationsn Portable and Desktop Computersn Multimedia Monitorsn Portable Radios, PDAs, and Porta ..
LM4836LQ ,Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input MuxElectrical Characteristics for Entire IC(Notes 8, 12) The following specifications apply for V = 5V ..
LM4836LQX ,Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input MuxElectrical Characteristics for Single-Ended Mode Operation (Continued)(Notes 8, 12) The following s ..
LM4836MT ,Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input MuxFeaturesselectable gain or bass boost, and an input mux making itn PC98 and PC99 Compliantoptimally ..


LM2586S-12-LM2586S-3.3-LM2586S-5.0-LM2586S-ADJ-LM2586SX-12-LM2586SX-ADJ-LM2586T-ADJ
SIMPLE SWITCHER 3-Amp Flyback Regulator
LM2586
SIMPLE SWITCHER® 3A Flyback Regulator with
Shutdown
General Description

The LM2586 seriesof regulatorsare monolithic integrated
circuits specificallydesignedfor flyback,step-up (boost),and
forward converter applications.The deviceis availablein4
different outputvoltageversions: 3.3V,5.0V,12V,and adjust-
able.
Requiringa minimum numberof externalcomponents, these
regulatorsare cost effective,and simpleto use. Includedin
the datasheetare typical circuitsof boostand flybackregula-
tors.Also listed areselector guidesfor diodes andcapacitors
anda familyof standard inductorsand flyback transformers
designedto work with these switching regulators.
The power switchisa 3.0A NPN devicethatcan stand-off
65V. Protectingthe power switchare current and thermal
limiting circuits,andan undervoltage lockout circuit. ThisIC
containsan adjustable frequency oscillatorthatcanbe pro-
grammed upto200 kHz.The oscillatorcan alsobe synchro-
nized with other devices,sothat multiple devicescan oper-
ateatthe same switching frequency.
Other features includesoft start modeto reduce in-rushcur-
rent during startup,and current mode controlfor improved
rejectionof input voltage and output load transients and
cycle-by-cycle current limiting.The device alsohasa shut-
downpin,sothatitcanbe turnedoff externally.An output
voltage toleranceof ±4%,within specified input voltagesand
output load conditions,is guaranteedforthe power supply
system.
Features
Requiresfew external components Familyof standard inductorsand transformers NPN output switches 3.0A,can standoff 65V Wide input voltage range:4Vto 40V Adjustable switching frequency:100 kHzto200kHz External shutdown capability Draws less than60μA when shut down Frequency synchronization Current-mode operationfor improved transient
response,line regulation,and currentlimit Internal soft-start function reduces in-rush current during
start-up Output transistor protectedby current limit, under
voltage lockout,and thermal shutdown System output voltage toleranceof ±4% max overline
and load conditions
Typical Applications
Flyback regulator Forward converter Multiple-output regulator Simple boost regulator
Flyback Regulator

SIMPLESWITCHER®andSwitchersMade Simple®areregistered trademarksof National SemiconductorCorporation.
DS012516-1
May 1996
LM2586
SIMPLE
SWITCHER
Flyback
Regulator
with
Shutdown
1999 National Semiconductor Corporation DS012516
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