Datasheet Texas Instruments LM3478

ManufacturerTexas Instruments
SeriesLM3478
Datasheet Texas Instruments LM3478

40V Wide Vin Low-Side N-Channel Controller for Switching Regulator

Datasheets

LM3478 High-Efficiency Low-Side N-Channel Controller for Switching Regulator datasheet
PDF, 1.5 Mb, Revision: X, File published: Feb 28, 2017
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Prices

Status

LM3478MA/NOPBLM3478MAX/NOPBLM3478MMLM3478MM/NOPBLM3478MMX/NOPB
Lifecycle StatusActive (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)
Manufacture's Sample AvailabilityYesNoNoYesYes

Packaging

LM3478MA/NOPBLM3478MAX/NOPBLM3478MMLM3478MM/NOPBLM3478MMX/NOPB
N12345
Pin88888
Package TypeDDDGKDGKDGK
Industry STD TermSOICSOICVSSOPVSSOPVSSOP
JEDEC CodeR-PDSO-GR-PDSO-GR-PDSO-GR-PDSO-GR-PDSO-G
Package QTY952500100010003500
CarrierTUBELARGE T&RSMALL T&RSMALL T&RLARGE T&R
Device MarkingL3478MAS14BS14BS14B
Width (mm)3.913.91333
Length (mm)4.94.9333
Thickness (mm)1.581.58.97.97.97
Pitch (mm)1.271.27.65.65.65
Max Height (mm)1.751.751.071.071.07
Mechanical DataDownloadDownloadDownloadDownloadDownload

Parametrics

Parameters / ModelsLM3478MA/NOPB
LM3478MA/NOPB
LM3478MAX/NOPB
LM3478MAX/NOPB
LM3478MM
LM3478MM
LM3478MM/NOPB
LM3478MM/NOPB
LM3478MMX/NOPB
LM3478MMX/NOPB
Duty Cycle(Max), %100100100100100
Iout(Max), A1010101010
Iq(Typ), mA2.72.72.72.72.7
Operating Temperature Range, C-40 to 125-40 to 125-40 to 125-40 to 125-40 to 125
Package GroupSOICSOICVSSOPVSSOPVSSOP
RatingCatalogCatalogCatalogCatalogCatalog
Regulated Outputs11111
Special FeaturesAdjustable Current Limit,Enable,Frequency Synchronization,Light Load Efficiency,Pre-Bias Start-UpAdjustable Current Limit,Enable,Frequency Synchronization,Light Load Efficiency,Pre-Bias Start-UpAdjustable Current Limit,Enable,Frequency Synchronization,Light Load Efficiency,Pre-Bias Start-UpAdjustable Current Limit,Enable,Frequency Synchronization,Light Load Efficiency,Pre-Bias Start-UpAdjustable Current Limit,Enable,Frequency Synchronization,Light Load Efficiency,Pre-Bias Start-Up
Switch Current Limit(Typ), A1010101010
Switching Frequency(Max), kHz10001000100010001000
Switching Frequency(Min), kHz100100100100100
TypeControllerControllerControllerControllerController
Vin(Max), V4040404040
Vin(Min), V2.972.972.972.972.97
Vout(Max), V500500500500500
Vout(Min), V1.261.261.261.261.26

Eco Plan

LM3478MA/NOPBLM3478MAX/NOPBLM3478MMLM3478MM/NOPBLM3478MMX/NOPB
RoHSCompliantCompliantSee ti.comCompliantCompliant

Application Notes

  • Softstart Using Constant Current Constant Voltage Approach
    PDF, 337 Kb, File published: Jul 24, 2015
    In many systems backup power is provided either by batteries or simply by a large value capacitor. Inthese applications the capacitor would only provide the current when the primary power source fails.Further, these applications are usually for light load currents. During normal operation the backupcapacitors are kept charged up by a DC/DC converter. The challenge involved in an application
  • Demystifying Type II and Type III Compensators Using Op-Amp and OTA for DC/DC Co
    PDF, 782 Kb, File published: Jul 11, 2014
  • AN-1286 Compensation For The LM3478 Boost Controller (Rev. C)
    PDF, 356 Kb, Revision: C, File published: Apr 23, 2013
    The LM3478 is a low side N-Channel controller for switching regulators. Like many switching controllers,the added flexibility in component selection can cause problems for users when determining thecompensation scheme. It is the goal of this application report to present a decent groundwork to allow thereader to select with confidence the correct compensation components. To achieve this we l
  • AN-1484 Designing A SEPIC Converter (Rev. E)
    PDF, 220 Kb, Revision: E, File published: Apr 23, 2013
    In a single ended primary inductance converter (SEPIC) design, the output voltage can be higher or lowerthan the input voltage. The SEPIC converter shown in Figure 1 uses two inductors: L1 and L2. The twoinductors can be wound on the same core since the same voltages are applied to them throughout theswitching cycle.
  • Modeling & Design of Current Mode Control Boost Converters (Rev. B)
    PDF, 316 Kb, Revision: B, File published: Apr 23, 2013
    This application note presents a detail modeling and design of current mode control boost convertersoperating in the continuous conduction mode (CCM). Based on the derived small signal models, thedesign of a lag compensator for current mode control boost converters will be detailed. The LM3478 boostcontroller will be used in the example. Simulation and hardware measurement of frequency respo
  • AN-1990 Compensation for Current Mode Control SEPIC Converters (Rev. A)
    PDF, 247 Kb, Revision: A, File published: Apr 23, 2013
    This application note discusses the use of SEPIC converters in various applications.
  • LM34xx How to Design Flyback Converter with LM3481 Boost Controller
    PDF, 1.7 Mb, File published: Sep 21, 2016
    The TexasInstrumentsLM3481boostcontrolleris a versatilelow-sideN-FEThigh-performancecontrollerfor switchingregulators.Thedevicehaswiderangeof applicationssuchas automotivestart-stopapplication,one-cellor two-cellLi-ionbattery-poweredportableBluetoothaudiosystem,industrialsystemisolatedsupplies,and so forth,and supportstopologi

Model Line

Manufacturer's Classification

  • Semiconductors> Power Management> Non-isolated DC/DC Switching Regulator> Step-Up (Boost)> Boost Controller (External Switch)
EMS supplier