Datasheet Texas Instruments LM2678

ManufacturerTexas Instruments
SeriesLM2678
Datasheet Texas Instruments LM2678

SIMPLE SWITCHER 8V to 40V, 5A High Efficiency Step-Down DC/DC Switching Regulator

Datasheets

LM2678 SIMPLE SWITCHER High Efficiency 5-A Step-Down Voltage Regulator datasheet
PDF, 2.3 Mb, Revision: K, File published: Jan 13, 2017
Extract from the document

Prices

Status

LM2678S-12LM2678S-12/NOPBLM2678S-3.3LM2678S-3.3/NOPBLM2678S-5.0LM2678S-5.0/NOPBLM2678S-ADJLM2678S-ADJ/NOPBLM2678SD-12LM2678SD-12/NOPBLM2678SD-3.3/NOPBLM2678SD-5.0/NOPBLM2678SD-ADJLM2678SD-ADJ/NOPBLM2678SDX-3.3/NOPBLM2678SDX-5.0/NOPBLM2678SDX-ADJ/NOPBLM2678SX-12/NOPBLM2678SX-3.3/NOPBLM2678SX-5.0LM2678SX-5.0/NOPBLM2678SX-ADJLM2678SX-ADJ/NOPBLM2678T-12/NOPBLM2678T-3.3/NOPBLM2678T-5.0LM2678T-5.0/NOPBLM2678T-ADJLM2678T-ADJ/NOPB
Lifecycle StatusNRND (Not recommended for new designs)Active (Recommended for new designs)NRND (Not recommended for new designs)Active (Recommended for new designs)NRND (Not recommended for new designs)Active (Recommended for new designs)NRND (Not recommended for new designs)Active (Recommended for new designs)NRND (Not recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)NRND (Not recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)NRND (Not recommended for new designs)Active (Recommended for new designs)NRND (Not recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)Active (Recommended for new designs)NRND (Not recommended for new designs)Active (Recommended for new designs)NRND (Not recommended for new designs)Active (Recommended for new designs)
Manufacture's Sample AvailabilityNoNoNoYesYesYesNoNoNoNoYesNoYesYesNoNoYesYesYesYesNoNoYesNoYesYesNoNoYes

Packaging

LM2678S-12LM2678S-12/NOPBLM2678S-3.3LM2678S-3.3/NOPBLM2678S-5.0LM2678S-5.0/NOPBLM2678S-ADJLM2678S-ADJ/NOPBLM2678SD-12LM2678SD-12/NOPBLM2678SD-3.3/NOPBLM2678SD-5.0/NOPBLM2678SD-ADJLM2678SD-ADJ/NOPBLM2678SDX-3.3/NOPBLM2678SDX-5.0/NOPBLM2678SDX-ADJ/NOPBLM2678SX-12/NOPBLM2678SX-3.3/NOPBLM2678SX-5.0LM2678SX-5.0/NOPBLM2678SX-ADJLM2678SX-ADJ/NOPBLM2678T-12/NOPBLM2678T-3.3/NOPBLM2678T-5.0LM2678T-5.0/NOPBLM2678T-ADJLM2678T-ADJ/NOPB
N1234567891011121314151617181920212223242526272829
Pin77777777141414141414141414777777777777
Package TypeKTWKTWKTWKTWKTWKTWKTWKTWNHMNHMNHMNHMNHMNHMNHMNHMNHMKTWKTWKTWKTWKTWKTWNDZNDZNDZNDZNDZNDZ
Industry STD TermTO-263TO-263TO-263TO-263TO-263TO-263TO-263TO-263VSONVSONVSONVSONVSONVSONVSONVSONVSONTO-263TO-263TO-263TO-263TO-263TO-263TO-220TO-220TO-220TO-220TO-220TO-220
JEDEC CodeR-PSFM-GR-PSFM-GR-PSFM-GR-PSFM-GR-PSFM-GR-PSFM-GR-PSFM-GR-PSFM-GR-PDSO-NR-PDSO-NR-PDSO-NR-PDSO-NR-PDSO-NR-PDSO-NR-PDSO-NR-PDSO-NR-PDSO-NR-PSFM-GR-PSFM-GR-PSFM-GR-PSFM-GR-PSFM-GR-PSFM-GR-MSFM-LR-MSFM-LR-MSFM-LR-MSFM-LR-MSFM-LR-MSFM-L
Package QTY4545454545454545250250250250250250250025002500500500500500500500454545454545
CarrierTUBETUBETUBETUBETUBETUBETUBETUBESMALL T&RSMALL T&RSMALL T&RSMALL T&RSMALL T&RSMALL T&RLARGE T&RLARGE T&RLARGE T&RLARGE T&RLARGE T&RLARGE T&RLARGE T&RLARGE T&RLARGE T&RTUBETUBETUBETUBETUBETUBE
Device MarkingS-12S-12LM2678S-3.3LM2678S-5.0S-ADJLM2678S0003BBS0003BBS0003CBS0003DBS0003EBS0003EBS0003CBS0003DBS0003EBLM2678S-3.3S-5.0LM2678S-ADJS-ADJT-12LM2678LM2678T-5.0LM2678T-ADJ
Width (mm)8.898.898.898.898.898.898.898.895555555558.898.898.898.898.898.8910.1610.1610.1610.1610.1610.16
Length (mm)10.110.110.110.110.110.110.110.166666666610.110.110.110.110.110.114.98614.98614.98614.98614.98614.986
Thickness (mm)4.444.444.444.444.444.444.444.441111111114.444.444.444.444.444.444.5724.5724.5724.5724.5724.572
Pitch (mm)1.271.271.271.271.271.271.271.27.8.8.8.8.8.8.8.8.81.271.271.271.271.271.271.271.271.271.271.271.27
Max Height (mm)4.654.654.654.654.654.654.654.651111111114.654.654.654.654.654.654.74.74.74.74.74.7
Mechanical DataDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownloadDownload

Parametrics

Parameters / ModelsLM2678S-12
LM2678S-12
LM2678S-12/NOPB
LM2678S-12/NOPB
LM2678S-3.3
LM2678S-3.3
LM2678S-3.3/NOPB
LM2678S-3.3/NOPB
LM2678S-5.0
LM2678S-5.0
LM2678S-5.0/NOPB
LM2678S-5.0/NOPB
LM2678S-ADJ
LM2678S-ADJ
LM2678S-ADJ/NOPB
LM2678S-ADJ/NOPB
LM2678SD-12
LM2678SD-12
LM2678SD-12/NOPB
LM2678SD-12/NOPB
LM2678SD-3.3/NOPB
LM2678SD-3.3/NOPB
LM2678SD-5.0/NOPB
LM2678SD-5.0/NOPB
LM2678SD-ADJ
LM2678SD-ADJ
LM2678SD-ADJ/NOPB
LM2678SD-ADJ/NOPB
LM2678SDX-3.3/NOPB
LM2678SDX-3.3/NOPB
LM2678SDX-5.0/NOPB
LM2678SDX-5.0/NOPB
LM2678SDX-ADJ/NOPB
LM2678SDX-ADJ/NOPB
LM2678SX-12/NOPB
LM2678SX-12/NOPB
LM2678SX-3.3/NOPB
LM2678SX-3.3/NOPB
LM2678SX-5.0
LM2678SX-5.0
LM2678SX-5.0/NOPB
LM2678SX-5.0/NOPB
LM2678SX-ADJ
LM2678SX-ADJ
LM2678SX-ADJ/NOPB
LM2678SX-ADJ/NOPB
LM2678T-12/NOPB
LM2678T-12/NOPB
LM2678T-3.3/NOPB
LM2678T-3.3/NOPB
LM2678T-5.0
LM2678T-5.0
LM2678T-5.0/NOPB
LM2678T-5.0/NOPB
LM2678T-ADJ
LM2678T-ADJ
LM2678T-ADJ/NOPB
LM2678T-ADJ/NOPB
Approx. Price (US$)2.20 | 1ku
Control ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage ModeVoltage Mode
Duty Cycle(Max), %91919191919191919191919191919191919191919191919191919191
Duty Cycle(Max)(%)91
Iout(Max), A5555555555555555555555555555
Iout(Max)(A)5
Iq(Typ), mA4.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.24.2
Iq(Typ)(mA)4.2
Operating Temperature Range, C-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125
Operating Temperature Range(C)-40 to 125
Package GroupDDPAK/TO-263DDPAK/TO-263DDPAK/TO-263DDPAK/TO-263DDPAK/TO-263DDPAK/TO-263DDPAK/TO-263DDPAK/TO-263VSONVSONVSONVSONVSONVSONVSONVSONVSONDDPAK/TO-263DDPAK/TO-263DDPAK/TO-263DDPAK/TO-263DDPAK/TO-263DDPAK/TO-263TO-220TO-220TO-220TO-220TO-220TO-220
RatingCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalogCatalog
Regulated Outputs1111111111111111111111111111
Regulated Outputs(#)1
Special FeaturesFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency SynchronizationFrequency Synchronization
Switching Frequency(Max), kHz260260260260260260260260260260260260260260260260260260260260260260260260260260260260
Switching Frequency(Max)(kHz)260
Switching Frequency(Min), kHz260260260260260260260260260260260260260260260260260260260260260260260260260260260260
Switching Frequency(Min)(kHz)260
TypeConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverterConverter
Vin(Max), V40404040404040404040404040404040404040404040404040404040
Vin(Max)(V)40
Vin(Min), V8888888888888888888888888888
Vin(Min)(V)8
Vout(Max), V37373737373737373737373737373737373737373737373737373737
Vout(Max)(V)37
Vout(Min), V1.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.231.23
Vout(Min)(V)1.23

Eco Plan

LM2678S-12LM2678S-12/NOPBLM2678S-3.3LM2678S-3.3/NOPBLM2678S-5.0LM2678S-5.0/NOPBLM2678S-ADJLM2678S-ADJ/NOPBLM2678SD-12LM2678SD-12/NOPBLM2678SD-3.3/NOPBLM2678SD-5.0/NOPBLM2678SD-ADJLM2678SD-ADJ/NOPBLM2678SDX-3.3/NOPBLM2678SDX-5.0/NOPBLM2678SDX-ADJ/NOPBLM2678SX-12/NOPBLM2678SX-3.3/NOPBLM2678SX-5.0LM2678SX-5.0/NOPBLM2678SX-ADJLM2678SX-ADJ/NOPBLM2678T-12/NOPBLM2678T-3.3/NOPBLM2678T-5.0LM2678T-5.0/NOPBLM2678T-ADJLM2678T-ADJ/NOPB
RoHSSee ti.comCompliantSee ti.comCompliantSee ti.comCompliantSee ti.comCompliantSee ti.comCompliantCompliantCompliantSee ti.comCompliantCompliantCompliantCompliantCompliantCompliantTBDCompliantSee ti.comCompliantCompliantCompliantSee ti.comCompliantSee ti.comCompliant
Pb FreeYesYesYesNoYesYesYesYesYes

Application Notes

  • AN-643 EMI/RFI Board Design (Rev. B)
    PDF, 742 Kb, Revision: B, File published: May 3, 2004
    Application Note 643 EMI/RFI Board Design
  • AN-1187 Leadless Leadframe Package (LLP) (Rev. R)
    PDF, 21.3 Mb, Revision: R, File published: May 7, 2013
    This application report discusses the Leadless Leadframe Package (LLP).
  • Input and Output Capacitor Selection
    PDF, 219 Kb, File published: Sep 19, 2005
  • AN-1197 Selecting Inductors for Buck Converters (Rev. B)
    PDF, 558 Kb, Revision: B, File published: Apr 23, 2013
    This application report provides design information to help select an off-the-shelf inductor for anycontinuous-mode buck converter application.
  • AN-1Positive-to-Negative Buck-Boost Converter Using LM267x SIMPLE SWITCHER (Rev. E)
    PDF, 291 Kb, Revision: E, File published: Apr 23, 2013
    The third generation Simple Switcher LM267X series of regulators are monolithic integrated circuits withan internal MOSFET switch. These regulators are simple to use and require only a few externalcomponents. In this article the design of a polarity inverting converter will be discussed.
  • AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)
    PDF, 3.6 Mb, Revision: A, File published: Apr 23, 2013
    This application note will explore how the layout of your DC/DC power supply can significantly affect theamount of EMI that it produces. It will discuss several variations of a layout analyze the results andprovide answers to some common EMI questions such whether or not to use a shielded inductor.
  • AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)
    PDF, 1.4 Mb, Revision: A, File published: Apr 23, 2013
    This application note provides thermal power analysis techniques for analyzing the power IC.
  • AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)
    PDF, 2.7 Mb, Revision: A, File published: Apr 23, 2013
    This application report shows how to measure the critical points of a bode plot with only an audiogenerator (or simple signal generator) and an oscilloscope. The method is explained in an easy to followstep-by-step manner so that a power supply designer can start performing these measurements in a shortamount of time.
  • Semiconductor and IC Package Thermal Metrics (Rev. C)
    PDF, 201 Kb, Revision: C, File published: Apr 19, 2016
  • Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)
    PDF, 512 Kb, Revision: A, File published: Sep 12, 2014
    Printed Circuit Board (PCB) layout for Switched Mode Power Supplies (SMPS) is critical to achieve proper converter operation good thermal performance and excellent radiated EMI performance. Optimized board layout for low radiated EMI is made very simple by the package and pin arrangement of the SIMPLE SWITCHER Synchronous Buck Converter family LM4360x and LM4600x
  • Simple Techniques Minimize Cross-Coupling in Distributed Power Systems
    PDF, 335 Kb, File published: Mar 21, 2007
  • AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)
    PDF, 82 Kb, Revision: C, File published: Apr 23, 2013
    When designing a high frequency switching regulated power supply layout is very important. Using agood layout can solve many problems associated with these types of supplies. The problems due to a badlayout are often seen at high current levels and are usually more obvious at large input to output voltagedifferentials. Some of the main problems are loss of regulation at high output current
  • AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)
    PDF, 374 Kb, Revision: C, File published: Apr 23, 2013
    This application report provides SIMPLE SWITCHER™ PCB layout guidelines.
  • AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)
    PDF, 2.5 Mb, Revision: C, File published: Apr 24, 2013
    Electromagnetic Interference (EMI) is an unwanted effect between two electrical systems as a result ofeither electromagnetic radiation or electromagnetic conduction. EMI is the major adverse effect caused bythe application of switch-mode power supplies (SMPS). In switching power supplies EMI noise isunavoidable due to the switching actions of the semiconductor devices and resulting disconti
  • AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)
    PDF, 427 Kb, Revision: C, File published: Apr 23, 2013
    This application note discusses stresses in wide input DC-DC converters.
  • AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)
    PDF, 9.2 Mb, Revision: B, File published: Apr 23, 2013
    This thermal application report provides guidelines for the optimal board layout to achieve the best thermalresistance for exposed packages. The thermal resistance between junction-to-ambient (ОёJA) is highlydependent on the PCB (Printed Circuit Board) design factors. This becomes more critical for packageshaving very low thermal resistance between junction-to-case such as exposed pad TSSOP

Model Line

Manufacturer's Classification

  • Semiconductors> Power Management> Non-isolated DC/DC Switching Regulator> Step-Down (Buck)> Buck Converter (Integrated Switch)
EMS supplier