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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, File uploaded 09-23-2017
    LTC3853 - Triple Output, Multiphase Synchronous Step-Down Controller
    Docket ↓
    LTC3853
    Triple Output,
    Multiphase Synchronous
    Step-Down Controller
    DESCRIPTION FEATURES Triple, 120° Phased Controllers Reduce Required
    Input Capacitance and Power Supply Induced Noise
    n Configurable as a 180° 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 ±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 × 6mm QFN Package The LTC®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

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 Controlnononononononono
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 Inductornononononononono
Ishutdown, A4242424242424242
Isupply, mA4.14.14.14.14.14.14.14.1
Max Phases33333333
Monolithicnononononononono
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
Polyphaseyesyesyesyesyesyesyesyes
Sense ResistorRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCRRsense, DCR
Switch Current, A2525252525252525
Switch Current 2, A2525252525252525
Switch Current 3, A2525252525252525
Synchronousyesyesyesyesyesyesyesyes
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

Articles

  • Download » Articles - LT Journal, PDF, 214 Kb, 06-01-2008
    6mm × 6mm DC/DC Controller Regulates Three Outputs; or Combine Two Outputs for Twice the Current
    Docket ↓
    L DESIGN IDEAS 6mm × 6mm DC/DC Controller
    Regulates Three Outputs; or Combine
    Two Outputs for Twice the Current
    by Theo Phillips Introduction
    The LTC3853 is a versatile 3-phase
    synchronous buck controller with
    on-chip drivers in a 6mm × 6mm
    QFN package. While each channel
    can independently deliver currents
    in excess of 15A, two of the channels
    can be combined for twice the current,
    with their relative operating phase
    automatically optimized to reduce
    output ripple. Channels 1 and 2 can
    be programmed for outputs from 0.8V
    to 5V, while channel 3 can support
    outputs from 0.8V to 13.2V. and minimizing the input capacitance
    requirement. Dual Output Converter
    with 2 + 1 Operation Figure 1 shows a 2-output converter
    working from a 14V to 24V input.
    Channels 1 and 2 feed the same 1.8V
    output, while channel 3 controls a
    second 12V output. This 2 + 1 mode ...

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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