Datasheet Linear Technology LTC1735

ManufacturerLinear Technology
SeriesLTC1735

High Efficiency Synchronous Step-Down Switching Regulator

Datasheets

Datasheet LTC1735
PDF, 415 Kb, Language: en, File uploaded: Sep 20, 2017, Pages: 32
High Efficiency Synchronous Step-Down Switching Regulator
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Prices

Packaging

LTC1735CF#PBFLTC1735CF#TRPBFLTC1735CGN#PBFLTC1735CGN#TRPBFLTC1735CS#PBFLTC1735CS#TRPBFLTC1735EGN#PBFLTC1735EGN#TRPBFLTC1735IF#PBFLTC1735IF#TRPBFLTC1735IGN#PBFLTC1735IGN#TRPBFLTC1735IS#PBFLTC1735IS#TRPBF
PackageTSSOP-20
Package Outline Drawing
TSSOP-20
Package Outline Drawing
SSOP-16
Package Outline Drawing
SSOP-16
Package Outline Drawing
SO-16
Package Outline Drawing
SO-16
Package Outline Drawing
SSOP-16
Package Outline Drawing
SSOP-16
Package Outline Drawing
TSSOP-20
Package Outline Drawing
TSSOP-20
Package Outline Drawing
SSOP-16
Package Outline Drawing
SSOP-16
Package Outline Drawing
SO-16
Package Outline Drawing
SO-16
Package Outline Drawing
Package CodeFFGNGNSSGNGNFFGNGNSS
Package Index05-08-1650 (F20)05-08-1650 (F20)05-08-1641 (GN16)05-08-1641 (GN16)05-08-1610 (S16)05-08-1610 (S16)05-08-1641 (GN16)05-08-1641 (GN16)05-08-1650 (F20)05-08-1650 (F20)05-08-1641 (GN16)05-08-1641 (GN16)05-08-1610 (S16)05-08-1610 (S16)
Pin Count2020161616161616202016161616

Parametrics

Parameters / ModelsLTC1735CF#PBFLTC1735CF#TRPBFLTC1735CGN#PBFLTC1735CGN#TRPBFLTC1735CS#PBFLTC1735CS#TRPBFLTC1735EGN#PBFLTC1735EGN#TRPBFLTC1735IF#PBFLTC1735IF#TRPBFLTC1735IGN#PBFLTC1735IGN#TRPBFLTC1735IS#PBFLTC1735IS#TRPBF
ArchitectureConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current Mode
Demo BoardsDC222A,DC247ADC222A,DC247ADC222A,DC247ADC222A,DC247ADC222A,DC247ADC222A,DC247ADC222A,DC247ADC222A,DC247ADC222A,DC247ADC222A,DC247ADC222A,DC247ADC222A,DC247ADC222A,DC247ADC222A,DC247A
Design ToolsLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice ModelLTspice Model
Export Controlnononononononononononononono
FeaturesExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft StartExternal Synchronization, Resistor Set Frequency, Active Voltage Positioning, Power Good, Soft Start
Frequency, kHz300300300300300300300300300300300300300300
Frequency Adjust RangeUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHz
Frequency Sync RangeUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHzUp to 500kHz
Integrated Inductornononononononononononononono
Ishutdown, µA1515151515151515151515151515
Isupply, mA0.450.450.450.450.450.450.450.450.450.450.450.450.450.45
Max Phases11111111111111
Monolithicnononononononononononononono
Number of Outputs11111111111111
Operating Temperature Range, °C0 to 700 to 700 to 700 to 700 to 700 to 700 to 850 to 85-40 to 85-40 to 85-40 to 85-40 to 85-40 to 85-40 to 85
Output Current, A2020202020202020202020202020
Polyphasenononononononononononononono
Sense ResistorRsenseRsenseRsenseRsenseRsenseRsenseRsenseRsenseRsenseRsenseRsenseRsenseRsenseRsense
Switch Current, A2020202020202020202020202020
Synchronousyesyesyesyesyesyesyesyesyesyesyesyesyesyes
TopologyBuckBuckBuckBuckBuckBuckBuckBuckBuckBuckBuckBuckBuckBuck
Vin Max, V3636363636363636363636363636
Vin Min, V3.53.53.53.53.53.53.53.53.53.53.53.53.53.5
Vout Max, V77777777777777
Vout Maximum7V7V7V7V7V7V7V7V7V7V7V7V7V7V
Vout Min, V0.80.80.80.80.80.80.80.80.80.80.80.80.80.8
Vref Accuracy Over Temp, %11111111111111

Eco Plan

LTC1735CF#PBFLTC1735CF#TRPBFLTC1735CGN#PBFLTC1735CGN#TRPBFLTC1735CS#PBFLTC1735CS#TRPBFLTC1735EGN#PBFLTC1735EGN#TRPBFLTC1735IF#PBFLTC1735IF#TRPBFLTC1735IGN#PBFLTC1735IGN#TRPBFLTC1735IS#PBFLTC1735IS#TRPBF
RoHSCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliant

Application Notes

  • OPTI-LOOP Architecture Reduces Output Capacitance and Improves Transient Response &mdash AN76
    PDF, 271 Kb, File published: May 1, 1999
    Loop compensation is an uncomfortable subject for many engineers. Experienced power supply designers know that optimum loop compensation is necessary to get the best performance from their power supplies. This application note discusses power supply loop compensation utilizing the features provided by the OPTILOOPTM architecture. Loop compensation basics are presented and simple equations are given for frequency response approximations. Typical transient response requirements for the system supply and CPU supply, used in notebook computers, are discussed. Output voltage transient response waveforms and Bode plots are shown for both optimized and nonoptimized control loops as well as for circuits with optimized loops using different output capacitors. Although this publication focuses on circuits using the LTC1628, LTC1735 and LTC1736, the information applies to all regulators equipped with OPTI-LOOP architecture.
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Design Notes

  • Active Voltage Positioning Reduces Output Capacitors &mdash Design Solutions 10
    PDF, 130 Kb, File published: Nov 1, 1999
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  • LTC1735 Provides Low Cost, Efficient Mobile CPU Power &mdash DN199
    PDF, 78 Kb, File published: Mar 1, 1999
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  • 2-Step Voltage Regulation Improves Performance and Decreases CPU Temperature in Portable Computers &mdash DN209
    PDF, 79 Kb, File published: Aug 1, 1999
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  • Microprocessor Core Supply Voltage Set by I2C Bus Without VID Lines &mdash DN279
    PDF, 75 Kb, File published: Mar 1, 2002
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Articles

  • Third-Generation DC/DC Controllers Reduce Size and Cost &mdash LT Journal
    PDF, 140 Kb, File published: Feb 1, 1999
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  • Active Voltage Positioning Saves Output Capacitors in Portable Computer Applications &mdash LT Journal
    PDF, 169 Kb, File published: Feb 1, 2000
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  • LTC1645/LTC1735 Circuit Solves PCI Power Problem &mdash LT Journal
    PDF, 232 Kb, File published: Feb 1, 2000
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  • A Third Generation Dual, Opposing-Phase Switching Regulator Controller &mdash LT Journal
    PDF, 172 Kb, File published: Jun 1, 1999
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  • SMBus Controls CPU Voltage Regulators without VID Pins &mdash LT Journal
    PDF, 148 Kb, File published: Sep 1, 2001
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Model Line

Manufacturer's Classification

  • Power Management > Switching Regulator > Step-Down (Buck) Regulators > External Power Switch Buck Controllers
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