Datasheet Linear Technology LT1074

ManufacturerLinear Technology
SeriesLT1074

Step-Down Switching Regulator

Datasheets

Datasheet LT1074, LT1076
PDF, 189 Kb, Language: en, File uploaded: Sep 3, 2017, Pages: 16
Step-Down Switching Regulator
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Prices

Packaging

LT1074CT#06PBFLT1074CT#30PBFLT1074CT#PBFLT1074CT7#06PBFLT1074CT7#PBFLT1074IT#06PBFLT1074IT#PBFLT1074IT7#PBF
N12345678
PackageTO-220
Package Outline Drawing
TO-220
Package Outline Drawing
TO-220
Package Outline Drawing
TO-220
Package Outline Drawing
TO-220
Package Outline Drawing
TO-220
Package Outline Drawing
TO-220
Package Outline Drawing
TO-220
Package Outline Drawing
Package CodeTTTT7T7TTT7
Package Index05-08-1421 (Flow 06)05-08-1421 (Std)05-08-1421 (Std)05-08-1422 (Std)05-08-1422 (Std)05-08-1421 (Flow 06)05-08-1421 (Std)05-08-1422 (Std)
Pin Count55577557

Parametrics

Parameters / ModelsLT1074CT#06PBFLT1074CT#30PBFLT1074CT#PBFLT1074CT7#06PBFLT1074CT7#PBFLT1074IT#06PBFLT1074IT#PBFLT1074IT7#PBF
ArchitectureConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current Mode
Design ToolsLTspice FileLTspice FileLTspice FileLTspice FileLTspice FileLTspice FileLTspice FileLTspice File
Export Controlnononononononono
Frequency, kHz100100100100100100100100
Integrated Inductornononononononono
Ishutdown, µA140140140140140140140140
Isupply, mA8.58.58.58.58.58.58.58.5
Max Phases11111111
Monolithicyesyesyesyesyesyesyesyes
Number of Outputs11111111
Operating Temperature Range, °C0 to 700 to 700 to 700 to 700 to 70-40 to 85-40 to 85-40 to 85
Output Current, A4.44.44.44.44.44.44.44.4
Polyphasenononononononono
Switch Current, A6.56.56.56.56.56.56.56.5
Synchronousnononononononono
TopologyBuck, InvertingBuck, InvertingBuck, InvertingBuck, InvertingBuck, InvertingBuck, InvertingBuck, InvertingBuck, Inverting
Vin Max, V4545454545454545
Vin Min, V7.37.37.37.37.37.37.37.3
Vout Max, V3535353535353535
Vout Maximum.85Vin.85Vin.85Vin.85Vin.85Vin.85Vin.85Vin.85Vin
Vout Min, V2.212.212.212.212.212.212.212.21
Vswitch Max, V6565656565656565

Eco Plan

LT1074CT#06PBFLT1074CT#30PBFLT1074CT#PBFLT1074CT7#06PBFLT1074CT7#PBFLT1074IT#06PBFLT1074IT#PBFLT1074IT7#PBF
RoHSCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliant

Other Options

LT1074HV LT1076 LT1076 LT1076HV

Application Notes

  • Step Down Switching Regulators &mdash AN35
    PDF, 6.2 Mb, File published: Aug 1, 1989
    Discusses the LT1074, an easily applied step-down regulator IC. Basic concepts and circuits are described along with more sophisticated applications. Six appended sections cover LT1074 circuitry detail, inductor and discrete component selection, current measuring techniques, efficiency considerations and other topics.
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  • LT1074/LT1076 Design Manual &mdash AN44
    PDF, 477 Kb, File published: Sep 1, 1991
    This note discusses the use of the LT1074 and LT1076 high efficiency switching regulators. These regulators are specifically designed for ease of use. This application note is intended to eliminate the most common errors that customers make when using switching regulators as well as offering insight into the inner workings of switching designs. There is an entirely new treatment of inductor design based upon simple mathematical formulas that yield direct results. There are extensive tutorial sections devoted to the care and feeding of the Positive Step- Down (Buck) Converter, the Tapped Inductor Buck Converter, the Positive-to-Negative Converter and the Negative Boost Converter. Additionally, many troubleshooting hints are included as well as oscilloscope techniques, soft-start architectures, and micropower shutdown and EMI suppression methods.
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  • Efficiency and Power Characteristics of Switching Regulator Circuits &mdash AN46
    PDF, 2.6 Mb, File published: Nov 1, 1991
    Efficiency varies for different DC/DC converters. This application note compares the efficiency characteristics of some of the more popular types. Step-up, step-down, flyback, negative-to-positive, and positive-to-negative are shown. Appended sections discuss how to select the proper aluminum electrolytic capacitor and explain power switch and output diode loss calculations.
  • Signal Sources, Conditioners and Power Circuitry Circuits of the Fall, 2004 &mdash AN98
    PDF, 886 Kb, File published: Nov 19, 2004
    Eighteen circuits are presented in this compilation. Signal sources include a voltage controlled current source, an amplitude/frequency stabilized sine wave oscillator, a versatile, 0V to 50V wideband level shift and four sub-nanosecond pulse generators with risetimes as low as 20ps. Five signal conditioners appear; a unique, single positive rail powered amplifier with output to (and below) zero volts, a milliohmmeter, a 0.02% accurate instrumentation amplifier with 120dB CMRR at 125VCM, a 100MHz switch with 5mV control channel feedthrough and a 5V powered, 15ppm linearity quartz stabilized V→F, converter. The power circuits section features a Xenon flashlamp supply, two 5V powered, 0V to 300V DC/DC converters, a fixed 200V output circuit for APD bias, a 100W 0V to 500V, 28V powered converter and a high current paralleling scheme for linear regulators. Two appended sections consider measurement technique and connection practice in sub-nanosecond circuits.
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Design Notes

  • No Design Switching Regulator 5V, 5A Buck (Step Down) Regulator &mdash DN48
    PDF, 70 Kb, File published: Aug 1, 1991
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  • No Design Switiching Regulator 5V Buck-Boost (Positive to Negative) Regulator &mdash DN49
    PDF, 71 Kb, File published: Sep 1, 1991
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Model Line

Manufacturer's Classification

  • Power Management > Switching Regulator > Step-Down (Buck) Regulators > High Input Voltage Buck | Internal Power Switch Buck
  • Power Management > Switching Regulator > Inverting Regulators
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