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LM2598S-12 |LM2598S12NSN/a190avaiSIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2598S-3.3 |LM2598S33NSN/a746avaiSIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2598S-5.0 |LM2598S50NSN/a1786avaiSIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2598S-ADJ |LM2598SADJNSN/a6000avaiSIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2598SX-12 |LM2598SX12NSN/a190avaiSIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2598SX-3.3 |LM2598SX33NSN/a1000avaiSIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2598SX-5.0 |LM2598SX50NSN/a1751avaiSIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2598SX-ADJ |LM2598SXADJNSCN/a6000avaiSIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2598T-3.3 |LM2598T33NSN/a132avaiSIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2598T-5.0 |LM2598T50NSN/a30avaiSIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2598T-ADJ |LM2598TADJNSN/a7avaiSIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features


LM2598S-ADJ ,SIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Featuresfeaturesn Guaranteed 1A output currentadded.n Available in 7-pin TO-220 and TO-263 (surface mount)R ..
LM2598SX-12 ,SIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with FeaturesFeaturesable in fixed output voltages of 3.3V, 5V, 12V, and an adjust-n 3.3V, 5V, 12V, and adjustab ..
LM2598SX-3.3 ,SIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with FeaturesElectrical CharacteristicsSpecifications with standard type face are for T = 25˚C, and those with b ..
LM2598SX-5.0 ,SIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with FeaturesLM2598 SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator, with
LM2598SX-ADJ ,SIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with FeaturesElectrical CharacteristicsSpecifications with standard type face are for T = 25˚C, and those with b ..
LM2598T-3.3 ,SIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with FeaturesApplicationsface mount types) are available from several different manu-facturers optimized for use ..
LM4889ITL ,1 Watt Audio Power Amplifierfeatures a low-power consumption shutdownturn-on and turn-off transitionsmode, which is achieved by ..
LM4889ITL ,1 Watt Audio Power AmplifierFeaturesprovide high quality output power with a minimal amount ofexternal components. The LM4889 d ..
LM4889ITLX ,1 Watt Audio Power AmplifierGeneral Description Key SpecificationsThe LM4889 is an audio power amplifier primarily designedj Im ..
LM4889LD ,1 Watt Audio Power AmplifierApplicationsexternal gain-setting resistors.n Mobile Phonesn PDAsn Portable electronic devicesTypic ..
LM4889LD ,1 Watt Audio Power AmplifierLM4889 1 Watt Audio Power AmplifierJune 2003LM48891 Watt Audio Power Amplifier
LM4889LDX ,1 Watt Audio Power AmplifierElectrical Characteristics V =5V (Notes 1, 2)DDThe following specifications apply for V = 5V, A = 2 ..


LM2598S-12-LM2598S-3.3-LM2598S-5.0-LM2598S-ADJ-LM2598SX-12-LM2598SX-3.3-LM2598SX-5.0-LM2598SX-ADJ-LM2598T-3.3-LM2598T-5.0-LM2598T-ADJ
SIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator, with Features
LM2598
SIMPLE SWITCHER® Power Converter 150 kHz Step-Down V oltage Regulator, with Features
General Description

The LM2598 seriesof regulators are monolithic integrated
circuits that provideallthe active functionsfora step-down
(buck) switching regulator, capableof drivinga1A load with
excellent line and load regulation. These devices are avail-
ablein fixed output voltagesof 3.3V,5V, 12V, andan adjust-
able output version.
This seriesof switching regulatorsis similartothe LM2595
series, with additional supervisory and performance features
added.
Requiringa minimum numberof external components, these
regulators are simpleto use and include internal frequency
compensation†, improved line and load specifications,
fixed-frequency oscillator, Shutdown /Soft-start, error flag
delay and error flag output.
The LM2598 series operatesata switching frequencyof 150
kHz thus allowing smaller sized filter components than what
wouldbe needed with lower frequency switching regulators.
Availableina standard 7-lead TO-220 package with several
different lead bend options, anda 7-lead TO-263 surface
mount package. Typically,for output voltages less than 12V,
and ambient temperatures less than 50˚C,no heat sinkis
required. standard seriesof inductors (both through hole and sur-
face mount types) are available from several different manu-
facturers optimizedfor use with the LM2598 series. This
feature greatly simplifies the designof switch-mode power
supplies.
Other features includea guaranteed ±4% toleranceon out-
put voltage underall conditionsof input voltage and output
load conditions, and ±15%on the oscillator frequency. Ex-
ternal shutdownis included, featuring typically 85μA
standby current. Self protection features includea two stage
current limitfor the output switch andan over temperature
shutdownfor complete protection under fault conditions.
Features
3.3V, 5V, 12V, and adjustable output versions Adjustable version output voltage range, 1.2Vto 37V
±4% max over line and load conditions Guaranteed1A output current Availablein 7-pin TO-220 and TO-263 (surface mount)
package Input voltage rangeupto 40V Excellent line and load regulation specifications 150 kHz fixed frequency internal oscillator Shutdown /Soft-start Outof regulation error flag Error output delay Low power standby mode,IQ typically85μA High Efficiency Uses readily available standard inductors Thermal shutdown and current limit protection
Applications
Simple high-efficiency step-down (buck) regulator Efficient pre-regulatorfor linear regulators On-card switching regulators Positiveto Negative converter
Typical Application
(Fixed Output Voltage Versions)
DS012593-1
January 2001
LM2598
SIMPLE
SWITCHER
Power
Converter
kHz
Step-Down
oltage
Regulator
with
Features
ic,good price


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