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Datasheet Linear Technology LTC3853

ManufacturerLinear Technology
SeriesLTC3853

Triple Output, Multiphase Synchronous Step-Down Controller

Datasheets

  • Download » Datasheet, PDF, 763 Kb, Revision: C
    LTC3853 - Triple Output, Multiphase Synchronous Step-Down Controller
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    LTC3853
    Triple Output,
    Multiphase Synchronous
    Step-Down Controller
    DESCRIPTION FEATURES Triple, 120В° Phased Controllers Reduce Required
    Input Capacitance and Power Supply Induced Noise
    n Configurable as a 180В° Dual Phase Controller Plus a
    Single Phase Controller
    n The Third Phase Can Regulate Up to a 13.5V Output
    n High Efficiency: Up to 92%
    n R
    SENSE or DCR Current Sensing
    n В±0.75% 0.8V Output Voltage Accuracy
    n Phase-Lockable Fixed Frequency 250kHz to 750kHz
    n Supports Pre-Biased Outputs
    n Dual N-Channel MOSFET Synchronous Drive
    n Wide V Range: 4.5V to 24V Operation (28V Abs Max)
    IN
    n Adjustable Soft-Start Current Ramping or Tracking
    n Foldback Output Current Limiting
    n Output Overvoltage Protectio Dual Power Good Output Voltage Monitors
    n 40-Lead 6mm Г— 6mm QFN Package The LTCВ®3853 is a high performance triple output stepdown switching regulator controller that drives all Nchannel synchronous power MOSFET stages. Power loss
    and supply noise are minimized by operating the output ...

Prices

Packaging

LTC3853EUJ#PBFLTC3853EUJ#TRPBFLTC3853HUJ#PBFLTC3853HUJ#TRPBFLTC3853IUJ#PBFLTC3853IUJ#TRPBFLTC3853MPUJ#PBFLTC3853MPUJ#TRPBF
Package6x6 QFN-406x6 QFN-406x6 QFN-406x6 QFN-406x6 QFN-406x6 QFN-406x6 QFN-406x6 QFN-40
Package CodeUJUJUJUJUJUJUJUJ

Parametrics

LTC3853EUJ#PBFLTC3853EUJ#TRPBFLTC3853HUJ#PBFLTC3853HUJ#TRPBFLTC3853IUJ#PBFLTC3853IUJ#TRPBFLTC3853MPUJ#PBFLTC3853MPUJ#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 BoardsDC1254A,DC1349ADC1254A,DC1349ADC1254A,DC1349ADC1254A,DC1349ADC1254A,DC1349ADC1254A,DC1349ADC1254A,DC1349ADC1254A,DC1349A
Design ToolsLTspice FileLTspice FileLTspice FileLTspice FileLTspice FileLTspice FileLTspice FileLTspice File
Export Control, yes/nonononononononono
FeaturesPolyPhase, DCR Current Sense, External Synchronization, PLL, Power Good, TrackingPolyPhase, DCR Current Sense, External Synchronization, PLL, Power Good, TrackingPolyPhase, DCR Current Sense, External Synchronization, PLL, Power Good, TrackingPolyPhase, DCR Current Sense, External Synchronization, PLL, Power Good, TrackingPolyPhase, DCR Current Sense, External Synchronization, PLL, Power Good, TrackingPolyPhase, DCR Current Sense, External Synchronization, PLL, Power Good, TrackingPolyPhase, DCR Current Sense, External Synchronization, PLL, Power Good, TrackingPolyPhase, DCR Current Sense, External Synchronization, PLL, Power Good, Tracking
Frequency, kHz500500500500500500500500
Frequency Adjust Range250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz
Frequency Sync Range250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz250kHz - 750kHz
Integrated Inductor, yes/nonononononononono
Ishutdown, ВµA4242424242424242
Isupply, mA4.14.14.14.14.14.14.14.1
Max Phases33333333
Monolithic, yes/nonononononononono
Number of Outputs33333333
Operating Temperature Range, °C0 to 850 to 85-40 to 125-40 to 125-40 to 85-40 to 85-55 to 125-55 to 125
Output Current, A2525252525252525
Output Current 2, A2525252525252525
Output Current 3, A2525252525252525
Polyphase, yes/noyesyesyesyesyesyesyesyes
Sense ResistorRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCR
Switch Current, A2525252525252525
Switch Current 2, A2525252525252525
Switch Current 3, A2525252525252525
Synchronous, yes/noyesyesyesyesyesyesyesyes
TopologyBuckBuckBuckBuckBuckBuckBuckBuck
Topology 1BuckBuckBuckBuckBuckBuckBuckBuck
Topology 2BuckBuckBuckBuckBuckBuckBuckBuck
Topology 3BuckBuckBuckBuckBuckBuckBuckBuck
Vin Max, V2424242424242424
Vin Min, V4.54.54.54.54.54.54.54.5
Vout Max, V13.513.513.513.513.513.513.513.5
Vout Max 2, V13.513.513.513.513.513.513.513.5
Vout Max 3, V13.513.513.513.513.513.513.513.5
Vout Maximum13.5V13.5V13.5V13.5V13.5V13.5V13.5V13.5V
Vout Min, V0.80.80.80.80.80.80.80.8
Vout Min 2, V0.80.80.80.80.80.80.80.8
Vout Min 3, V0.80.80.80.80.80.80.80.8
Vref Accuracy Over Temp, %11111111

Eco Plan

Moldel Line

Series: LTC3853 (8)

Manufacturer's Classification

  • Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | External Power Switch Buck Controllers
  • Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators

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