Datasheet Linear Technology LT1172HVIQ#TRPBF

ManufacturerLinear Technology
SeriesLT1172HV
Part NumberLT1172HVIQ#TRPBF

100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators

Datasheets

LT1170/LT1171/LT1172 - 100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators
PDF, 339 Kb, Revision: I, File uploaded: Sep 3, 2017
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Prices

Packaging

PackageDDPAK-5
Package CodeQ
Package Index05-08-1461

Parametrics

ArchitectureConstant Frequency Current Mode
Design ToolsLTspice File
Export Controlno
FeaturesExternal Synchronization
Frequency100 kHz
Frequency Sync Range120kHz - 160kHz
Integrated Inductorno
Ishutdown50 µA
Isupply6 mA
Monolithicyes
Number of Outputs1
Operating Temperature Range-40 to 85 °C
Polyphaseno
Switch Current1.25 A
Synchronousno
TopologyBoost, Flyback, Sepic
Vin Max60 V
Vin Min3 V
Vin Min Startup3 V
Vout Max60 V
Vout Min1.244 V
Vswitch Max75 V

Eco Plan

RoHSCompliant

Other Options

LT1170 LT1170HV LT1171 LT1171HV LT1172

Application Notes

  • Power Conversion, Measurement and Pulse Circuits &mdash AN113
    PDF, 692 Kb, File published: Aug 7, 2007
    This ink marks LTC’s eighth circuit collection publication.1 We are continually surprised, to the point of near mystification, by these circuit amalgams seemingly limitless appeal. Reader requests ascend rapidly upon publication, remaining high for years, even decades. All LTC circuit collections, despite diverse content, share this popularity, although just why remains an open question. Why is it? Perhaps the form; compact, complete, succinct and insular. Perhaps the freedom of selection without commitment, akin to window shopping. Or, perhaps, simply the pleasure of new recruits for the circuit aficionados intellectual palate. Locally based electrosociolgists, spinning elegantly contrived theories, offer explanation, but no convincing evidence is at hand. What is certain is that readers are attracted to these compendiums and that calls us to attention. As such, in accordance with our mission to serve customer preferences, this latest collection is presented. Enjoy.
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  • High Voltage, Low Noise, DC/DC Converters &mdash AN118
    PDF, 2.6 Mb, File published: Mar 28, 2008
    Photomultipliers (PMT), avalanche photodiodes (APD), ultrasonic transducers, capacitance microphones, radiation detectors and similar devices require high voltage, low current bias. Additionally, the high voltage must be pristinely free of noise; well under a millivolt is a common requirement with a few hundred microvolts sometimes necessary. Normally, switching regulator configurations cannot achieve this performance level without employing special techniques. One aid to achieving low noise is that load currents rarely exceed 5mA. This freedom permits output filtering methods that are usually impractical.
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  • Illumination Circuitry for Liquid Crystal Displays &mdash AN49
    PDF, 5.3 Mb, File published: Aug 23, 1992
    Current generation portable computers and instruments utilize backlit liquid crystal displays. The back light requires a highly efficient, high voltage AC source as well as other supply circuitry. AN49 details these circuits and also includes sections on efficiency measurements and instrumentation considerations. A separate section discusses physical and layout considerations for the display.
  • Power Conditioning for Notebook and Palmtop Systems &mdash AN51
    PDF, 260 Kb, File published: Aug 3, 1992
    Notebook and palmtop systems need a number of voltages developed from a battery. Competitive solutions require small size, high efficiency and light weight. This publication includes circuits for high efficiency 5V and 3.3V switching and linear regulators, back light display drivers and battery chargers. All the circuits are specifically tailored for the requirements outlined above.
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  • Techniques for 92% Efficient LCD Illumination &mdash AN55
    PDF, 688 Kb, File published: Aug 1, 1993
    This publication details several LCD backlight circuits which feature 92% efficiency. Other benefits include low voltage operation, synchronizing capability, higher output power for color displays, and extended dimming range. Extensive coverage of practical issues includes layout problems, multi-lamp displays, safety and reliability concerns and efficiency and photometric measurements. Also included is a review of circuits which did not work along with appropriate commentary.
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  • Practical Circuitry for Measurement and Control Problems &mdash AN61
    PDF, 1.1 Mb, File published: Aug 1, 1994
    This collection of circuits was worked out between June 1991 and July of 1994. Most were designed at customer request or are derivatives of such efforts. Types of circuits include power converters, transducer signal conditioners, amplifiers and signal generators. Specific circuits include low noise amplifiers, high power single cell DC/DC converters, portable high accuracy barometers, a 10mHz 1% accuracy RMS/DC converter, and random noise generators. Appended sections cover noise theory and present a historical perspective of wideband amplifiers.
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  • A Fourth Generation of LCD Backlight Technology &mdash AN65
    PDF, 5.9 Mb, File published: Nov 1, 1995
    This publication, LTC's fourth effort devoted to LCD backlighting in as many years, treats the subject comprehensively. The text considers lamps, display and layout induced losses, circuitry, efficiency related issues, optimization and measurement techniques. Twelve appended sections cover lamp types, mechanical design, electrical and photometric measurement, layout, circuitry and related topics.
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  • 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

  • Switching Regulator Allows Alkalines to Replace NiCads &mdash DN41
    PDF, 70 Kb, File published: Nov 1, 1990
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  • Switching Regulator Generates Both Positive and Negative Supply with a Single Inductor - Design Note 47 &mdash DN47
    PDF, 91 Kb, File published: May 1, 1991
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Articles

  • High Isolation Converter Uses Off-the-Shelf Magnetics &mdash LT Journal
    PDF, 233 Kb, File published: May 1, 1998
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  • Positive-to-Negative Converter Powers В–48V Telecom Circuits &mdash LT Journal
    PDF, 230 Kb, File published: May 1, 1998
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Model Line

Manufacturer's Classification

  • Power Management > Switching Regulator > Step-Up (Boost) Regulators > Internal Power Switch Boost
  • Space & Harsh Environment > Military Hermetic (M)

Other Names:

LT1172HVIQTRPBF, LT1172HVIQ TRPBF

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