LM2678T-ADJ/NOPB ,SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator 7-TO-220 -40 to 125Block Diagram... 104 Revision HistoryNOTE: Page numbers for previous revisions may differ from page ..
LM2679 ,SIMPLE SWITCHER ?5A Step-Down Voltage Regulator with Adjustable Current LimitFeaturesn Efficiency up to 92%The LM2679 series of regulators are monolithic integratedcircuits whi ..
LM2679S-12 ,SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limitfeatures include the ability to reduce the input surgecurrentatpower-ONbyaddingasoftstarttimingcapa ..
LM2679S-12 ,SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limitfeatures include the ability to reduce the input surgecurrentatpower-ONbyaddingasoftstarttimingcapa ..
LM2679S-3.3 ,SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current LimitFeaturesn Efficiency up to 92%The LM2679 series of regulators are monolithic integratedcircuits whi ..
LM2679S-5.0 ,SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current LimitLM2679 SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current LimitOctober 2003LM26 ..
LM555H/883 ,TimerFEATURES DESCRIPTIONThe LM555 is a highly stable device for generating2• Direct Replacement for SE5 ..
LM555J ,TimerFeaturesn Direct replacement for SE555/NE555The LM555 is a highly stable device for generating accu ..
LM555J/883 ,TimerMICROCIRCUIT DATA SHEETOriginal Creation Date: 08/02/95MJLM555-X REV 1A0Last Update Date: 03/16/01L ..
LM555J/883 ,TimerApplicationsn Precision timingn Pulse generationn Sequential timingn Time delay generationn Pulse w ..
LM556CM ,Dual TimerMICROCIRCUIT DATA SHEETOriginal Creation Date: 08/02/95MNLM556-X REV 0BLLast Update Date: 11/12/98L ..
LM556CMX ,Dual TimerLM556 Dual TimerMarch 2000LM556Dual Timer
LM2678S-5.0/NOPB-LM2678SX-5.0/NOPB-LM2678T-ADJ/NOPB
SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator 7-DDPAK/TO-263 -40 to 125
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LM2678SNVS029K –MARCH 2000–REVISED FEBRUARY 2017
LM2678 SIMPLE SWITCHER® High Efficiency 5-A Step-Down Voltage Regulator Features Efficiency Upto 92% Simple and Easyto Design Using Off-the-Shelf
External Components 120-mΩ DMOS Output Switch 3.3-V, 5-V, and 12-V Fixed Output and Adjustable
(1.2Vto37V) Versions 50-μA Standby Current When Switched OFF ±2% Maximum Output Tolerance Over Full Line
and Load Conditions Wide Input Voltage Range:8Vto40V 260-kHz Fixed Frequency Internal Oscillator −40to 125°C Operating Junction Temperature
Range Createa Custom Design Using the LM2678 With
the WEBENCH® Power Designer
Applications Simple-to-Design, High Efficiency (>90%) Step-
Down Switching Regulators Efficient System Preregulator for Linear Voltage
Regulators Battery Chargers
DescriptionThe LM2678 series of regulators are monolithic
integrated circuits which provide all of the active
functions fora step-down (buck) switching regulator
capableof driving upto 5-A loads with excellent line
and load regulation characteristics. High efficiency
(>90%)is obtained through the useofa low ON-
resistance DMOS power switch. The series consists fixed output voltagesof 3.3V,5V, and 12V and adjustable output version.
The SIMPLE SWITCHER® concept provides fora
complete design usinga minimum numberof external
components. A high fixed frequency oscillator
(260 kHz) allows the useof physically smaller sized
components.A familyof standard inductors for use
with the LM2678 are available from several
manufacturersto greatly simplify the design process.
The LM2678 series also has built-in thermal
shutdown, current limiting, and an ON/OFF control
input that can power down the regulatortoa low 50- quiescent current standby condition. The output
voltageis ensuredtoa ±2% tolerance. The clock
frequencyis controlledto withina ±11% tolerance.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application
