Datasheet Linear Technology LTC3857

ManufacturerLinear Technology
SeriesLTC3857

Low IQ, Dual, 2-Phase Synchronous Step-Down Controller

Datasheets

Datasheet LTC3857
PDF, 453 Kb, Language: en, File uploaded: Sep 23, 2017, Pages: 38
Low IQ, Dual, 2-Phase Synchronous Step-Down Controller
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Prices

Packaging

LTC3857EUH#PBFLTC3857EUH#TRPBFLTC3857IUH#PBFLTC3857IUH#TRPBF
N1234
Package5x5 QFN-32
Package Outline Drawing
5x5 QFN-32
Package Outline Drawing
5x5 QFN-32
Package Outline Drawing
5x5 QFN-32
Package Outline Drawing
Package CodeUHUHUHUH
Package Index05-08-169305-08-169305-08-169305-08-1693
Pin Count32323232

Parametrics

Parameters / ModelsLTC3857EUH#PBFLTC3857EUH#TRPBFLTC3857IUH#PBFLTC3857IUH#TRPBF
ArchitectureConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current Mode
Demo BoardsDC1381A-ADC1381A-ADC1381A-ADC1381A-A
Design ToolsLTspice File,LTpowerCAD FileLTspice File,LTpowerCAD FileLTspice File,LTpowerCAD FileLTspice File,LTpowerCAD File
Export Controlnononono
FeaturesBurst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power GoodBurst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power GoodBurst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power GoodBurst Mode, DCR Current Sense, Resistor Set Frequency, External Synchronization, Power Good
Frequency, kHz850850850850
Frequency Adjust Range50kHz - 900kHz50kHz - 900kHz50kHz - 900kHz50kHz - 900kHz
Frequency Sync Range75kHz - 850kHz75kHz - 850kHz75kHz - 850kHz75kHz - 850kHz
Integrated Inductornononono
Ishutdown, µA0.010.010.010.01
Isupply, mA0.050.050.050.05
Max Phases2222
Monolithicnononono
Number of Outputs2222
Operating Temperature Range, °C0 to 850 to 85-40 to 85-40 to 85
Output Current, A25252525
Output Current 2, A25252525
Over Voltage Protection, V40404040
Polyphaseyesyesyesyes
Sense ResistorRsense, DCRRsense, DCRRsense, DCRRsense, DCR
Switch Current, A25252525
Switch Current 2, A25252525
Synchronousyesyesyesyes
TopologyBuckBuckBuckBuck
Topology 1BuckBuckBuckBuck
Topology 2BuckBuckBuckBuck
Vin Max, V38383838
Vin Min, V4444
Vout Max, V24242424
Vout Maximum24V24V24V24V
Vout Min, V0.80.80.80.8
Vout Min 2, V.8.8.8.8
Vref Accuracy Over Temp, %1111

Eco Plan

LTC3857EUH#PBFLTC3857EUH#TRPBFLTC3857IUH#PBFLTC3857IUH#TRPBF
RoHSCompliantCompliantCompliantCompliant

Model Line

Manufacturer's Classification

  • Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | Micropower Buck Regulators | High Input Voltage Buck | External Power Switch Buck Controllers
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