Datasheet Linear Technology LTC3856

ManufacturerLinear Technology
SeriesLTC3856

2-Phase Synchronous Step-Down DC/DC Controller with Diffamp

Datasheets

Datasheet LTC3856
PDF, 840 Kb, Language: en, File uploaded: Sep 23, 2017, Pages: 40
2-Phase Synchronous Step-Down DC/DC Controller with Diffamp
Extract from the document

Prices

Packaging

LTC3856EFE#PBFLTC3856EFE#TRPBFLTC3856EUH#PBFLTC3856EUH#TRPBFLTC3856IFE#PBFLTC3856IFE#TRPBFLTC3856IUH#PBFLTC3856IUH#TRPBF
N12345678
PackageTSSOP-38
Package Outline Drawing
TSSOP-38
Package Outline Drawing
5x5 QFN-32
Package Outline Drawing
5x5 QFN-32
Package Outline Drawing
TSSOP-38
Package Outline Drawing
TSSOP-38
Package Outline Drawing
5x5 QFN-32
Package Outline Drawing
5x5 QFN-32
Package Outline Drawing
Package CodeFEFEUHUHFEFEUHUH
Package Index05-08-177205-08-177205-08-169305-08-169305-08-177205-08-177205-08-169305-08-1693
Pin Count3838323238383232

Parametrics

Parameters / ModelsLTC3856EFE#PBFLTC3856EFE#TRPBFLTC3856EUH#PBFLTC3856EUH#TRPBFLTC3856IFE#PBFLTC3856IFE#TRPBFLTC3856IUH#PBFLTC3856IUH#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 Mode
Demo BoardsDC1580ADC1580ADC1580ADC1580ADC1580ADC1580ADC1580ADC1580A
Design ToolsLTspice File,LTpowerCAD FileLTspice File,LTpowerCAD FileLTspice File,LTpowerCAD FileLTspice File,LTpowerCAD FileLTspice File,LTpowerCAD FileLTspice File,LTpowerCAD FileLTspice File,LTpowerCAD FileLTspice File,LTpowerCAD File
Export Controlnononononononono
FeaturesPolyPhase, Active Voltage Positioning, Differential Remote Sense, Burst Mode, DCR Current Sense, Phase Shedding, External Synchronization, PLL, Tracking, Power GoodPolyPhase, Active Voltage Positioning, Differential Remote Sense, Burst Mode, DCR Current Sense, Phase Shedding, External Synchronization, PLL, Tracking, Power GoodPolyPhase, Active Voltage Positioning, Differential Remote Sense, Burst Mode, DCR Current Sense, Phase Shedding, External Synchronization, PLL, Tracking, Power GoodPolyPhase, Active Voltage Positioning, Differential Remote Sense, Burst Mode, DCR Current Sense, Phase Shedding, External Synchronization, PLL, Tracking, Power GoodPolyPhase, Active Voltage Positioning, Differential Remote Sense, Burst Mode, DCR Current Sense, Phase Shedding, External Synchronization, PLL, Tracking, Power GoodPolyPhase, Active Voltage Positioning, Differential Remote Sense, Burst Mode, DCR Current Sense, Phase Shedding, External Synchronization, PLL, Tracking, Power GoodPolyPhase, Active Voltage Positioning, Differential Remote Sense, Burst Mode, DCR Current Sense, Phase Shedding, External Synchronization, PLL, Tracking, Power GoodPolyPhase, Active Voltage Positioning, Differential Remote Sense, Burst Mode, DCR Current Sense, Phase Shedding, External Synchronization, PLL, Tracking, Power Good
Frequency, kHz770770770770770770770770
Frequency Sync Range250kHz - 770kHz250kHz - 770kHz250kHz - 770kHz250kHz - 770kHz250kHz - 770kHz250kHz - 770kHz250kHz - 770kHz250kHz - 770kHz
Integrated Inductornononononononono
Ishutdown, µA4040404040404040
Isupply, mA44444444
Max Phases2, 3, 4, 6, 122, 3, 4, 6, 122, 3, 4, 6, 122, 3, 4, 6, 122, 3, 4, 6, 122, 3, 4, 6, 122, 3, 4, 6, 122, 3, 4, 6, 12
Monolithicnononononononono
Number of Outputs11111111
Operating Temperature Range, °C0 to 850 to 850 to 850 to 85-40 to 85-40 to 85-40 to 85-40 to 85
Output Current, A6060606060606060
Polyphaseyesyesyesyesyesyesyesyes
Sense ResistorRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCR
Switch Current, A6060606060606060
Synchronousyesyesyesyesyesyesyesyes
TopologyBuckBuckBuckBuckBuckBuckBuckBuck
Vin Max, V3838383838383838
Vin Min, V4.54.54.54.54.54.54.54.5
Vout Max, V55555555
Vout Maximum5V (without diff amp), 3.3V (with diff amp)5V (without diff amp), 3.3V (with diff amp)5V (without diff amp), 3.3V (with diff amp)5V (without diff amp), 3.3V (with diff amp)5V (without diff amp), 3.3V (with diff amp)5V (without diff amp), 3.3V (with diff amp)5V (without diff amp), 3.3V (with diff amp)5V (without diff amp), 3.3V (with diff amp)
Vout Min, V0.60.60.60.60.60.60.60.6
Vref Accuracy Over Temp, %0.750.750.750.750.750.750.750.75

Eco Plan

LTC3856EFE#PBFLTC3856EFE#TRPBFLTC3856EUH#PBFLTC3856EUH#TRPBFLTC3856IFE#PBFLTC3856IFE#TRPBFLTC3856IUH#PBFLTC3856IUH#TRPBF
RoHSCompliantCompliantCompliantCompliantCompliantCompliantCompliantCompliant

Design Notes

  • 2-Phase Synchronous Buck Controller Features Light Load Stage Shedding Mode, Active Voltage Positioning, Low RSENSE and Remote VOUT Sensing &mdash DN486
    PDF, 96 Kb, File published: Nov 10, 2010
    Extract from the document

Articles

  • 2-Phase Synchronous Step-Down DC/DC Controller with Programmable Stage Shedding Mode and Active Voltage Positioning for High Efficiency and Fast Transient Response &mdash LT Journal
    PDF, 1.3 Mb, File published: Jun 30, 2010
    Extract from the document

Model Line

Manufacturer's Classification

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