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LM2674LD-12 |LM2674LD12NSN/a45avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674LD-3.3 |LM2674LD33NSN/a1150avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674LD-5.0 |LM2674LD50NSN/a4690avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674LD-ADJ |LM2674LDADJNSN/a2721avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674LDX-3.3 |LM2674LDX33NSN/a2847avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674LDX-5.0 |LM2674LDX50NSN/a2548avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674LDX-ADJ |LM2674LDXADJNSN/a2349avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674M-1.2 |LM2674M12NSN/a10avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674M-12 |LM2674M12NSN/a1113avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674-M3.3 |LM2674M33NSN/a9avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674M-3.3 |LM2674M33NSCN/a120avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674M-5.0 |LM2674M50NSN/a2800avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674MADJNSN/a37avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674M-ADJ |LM2674MADJNS Pb-freeN/a25avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674M-ADJ |LM2674MADJNSN/a920avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674M-ADJ |LM2674MADJNS ?N/a8avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674M-ADJ |LM2674MADJNSCN/a28avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674M-ADJ |LM2674MADJNATIONALN/a50avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674MX-12 |LM2674MX12NSCN/a2691avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674MX-12 |LM2674MX12NSN/a649avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674MX-3.3 |LM2674MX33NSN/a2502avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674MX-5.0 |LM2674MX50NSN/a3383avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674MX-ADJ |LM2674MXADJNSN/a5000avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674N-12 |LM2674N12NSN/a2avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674N-3.3 |LM2674N33NSN/a1280avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674N-5.0 |LM2674N50NSN/a255avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674N-ADJ |LM2674NADJNSN/a145avaiSIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator


LM2674MX-ADJ ,SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage RegulatorFeaturesswitchingregulator,capableofdrivinga500mAloadcurrentn Efficiency up to 96%with excellent li ..
LM2674N-12 ,SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage RegulatorFeaturesswitchingregulator,capableofdrivinga500mAloadcurrentn Efficiency up to 96%with excellent li ..
LM2674N-3.3 ,SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage RegulatorGeneral Descriptionthere exists computer design software, LM267X MadeThe LM2674 series of regulator ..
LM2674N-5.0 ,SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage RegulatorGeneral Descriptionthere exists computer design software, LM267X MadeThe LM2674 series of regulator ..
LM2674N-ADJ ,SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage RegulatorLM2674 SIMPLE SWITCHER Power Converter High Efficiency 500 mA Step-Down VoltageRegulatorFebruary 20 ..
LM2675LD-12 ,SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage RegulatorApplicationsOther
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LM5070SD-80 ,Integrated Power Over Ethernet PD Interface and PWM ControllerApplicationscurrent mode pulse width modulator dc-dc converter. Allpower sequencing requirements be ..
LM5071MT-50 , Power Over Ethernet PD Controller with Auxiliary Power Power Over Ethernet PD Controller with Auxiliary Power


LM2674LD-12-LM2674LD-3.3-LM2674LD-5.0-LM2674LD-ADJ-LM2674LDX-3.3-LM2674LDX-5.0-LM2674LDX-ADJ-LM2674M-1.2-LM2674M-12-LM2674-M3.3-LM2674M-3.3-LM2674M-5.0-LM2674MADJ-LM2674M-ADJ-LM2674MX-12-LM2674MX-3.3-LM2674MX-5.0-LM2674MX-ADJ-LM2674N-12-LM2674N-3.3-LM2674N-5.0-LM
SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator
LM2674
SIMPLE SWITCHER® Power Converter High Efficiency
500 mA Step-Down V oltage Regulator
General Description

The LM2674 seriesof regulators are monolithic integrated
circuits built witha LMDMOS process. These regulators
provideall the active functions fora step-down (buck)
switching regulator, capableof drivinga 500 mA load current
with excellent line and load regulation. These devices are
availablein fixed output voltagesof 3.3V, 5.0V, 12V, andan
adjustable output version.
Requiringa minimum numberof external components, these
regulators are simpleto use and include patented internal
frequency compensation (Patent Nos. 5,382,918 and
5,514,947) anda fixed frequency oscillator.
The LM2674 series operatesata switching frequencyof
260 kHz, thus allowing smaller sized filter components than
what wouldbe needed with lower frequency switching regu-
lators. Becauseofits very high efficiency (>90%),the cop-
per traceson the printed circuit board are the only heat
sinking needed. familyof standard inductorsfor use withthe LM2674 are
available from several different manufacturers. This feature
greatly simplifies the designof switch-mode power supplies
using these advanced ICs. Also includedin the datasheet
are selector guidesfor diodes and capacitors designedto
workin switch-mode power supplies.
Other features includea guaranteed ±1.5% toleranceon
output voltage within specified input voltages and output
load conditions, and ±10%on the oscillator frequency. Ex-
ternal shutdownis included, featuring typically 50 µA
stand-by current. The output switch includes current limiting, wellas thermal shutdownforfull protection under fault
conditions. simplify the LM2674 buck regulator design procedure,
there exists computer design software, LM267X Made
Simple
(version 6.0).
Features
Efficiencyupto 96% Availablein SO-8, 8-pin DIP and LLP packages Computer Design Software LM267X Made Simple
(version 6.0) Simple and easyto design with Requires only5 external components Uses readily available standard inductors 3.3V, 5.0V, 12V, and adjustable output versions Adjustable version output voltage range: 1.21Vto 37V ±1.5% max output voltage tolerance over line and load
conditions Guaranteed 500mA output load current 0.25Ω DMOS Output Switch Wide input voltage range:8Vto 40V 260 kHz fixed frequency internal oscillator TTL shutdown capability, low power standby mode Thermal shutdown and current limit protection
Typical Applications
Simple High Efficiency (>90%) Step-Down (Buck)
Regulator Efficient Pre-Regulatorfor Linear Regulators Positive-to-Negative Converter
Typical Application

February 2005
LM2674
SIMPLE
SWITCHER
Power
Converter
High
Efficiency
Step-Down
oltage
Regulator
ic,good price


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