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Datasheet Linear Technology LTC3891EFE#TRPBF

ManufacturerLinear Technology
Part NumberLTC3891EFE#TRPBF

Low IQ, 60V Synchronous Step-Down Controller


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    LTC3891 - Low IQ, 60V Synchronous Step-Down Controller
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    Low IQ, 60V Synchronous
    Step-Down Controller
    FEATURES n n n n n n n n n n n n n n n n DESCRIPTION Wide VIN Range: 4V to 60V (65V Abs Max)
    Low Operating IQ: 50μA
    Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 24V
    RSENSE or DCR Current Sensing
    Phase-Lockable Frequency (75kHz to 750kHz)
    Programmable Fixed Frequency (50kHz to 900kHz)
    Selectable Continuous, Pulse-Skipping or Low Ripple
    Burst Mode® Operation at Light Load
    Selectable Current Limit
    Very Low Dropout Operation: 99% Duty Cycle
    Adjustable Output Voltage Soft-Start or Tracking
    Power Good Output Voltage Monitor
    Output Overvoltage Protection
    Low Shutdown IQ: < 14μA
    Internal LDO Powers Gate Drive from VIN or EXTVCC
    No Current Foldback During Start-Up
    Small 20-Pin 3mm × 4mm QFN and TSSOP Packages APPLICATIONS Automotive Always-On Systems Battery Powered Digital Devices
    n Distributed DC Power Systems The LTC®3891 is a high performance step-down switching
    regulator DC/DC controller that drives an all N-channel
    synchronous power MOSFET stage. A constant frequency current mode architecture allows a phase-lockable ...



Package CodeFE


ArchitectureConstant Frequency Current Mode
Demo BoardsDC1940A,DC1695B
Design ToolsLTspice File,LTpowerCAD File
Export Controlno yes/no
FeaturesDCR Current Sense, Resistor Set Frequency, External Synchronization, Burst Mode, Power Good
Frequency900 kHz
Frequency Adjust Range50kHz - 900kHz
Frequency Sync Range75kHz - 750kHz
Integrated Inductorno yes/no
Ishutdown14 µA
Isupply0.05 mA
Max Phases1
Monolithicno yes/no
Number of Outputs1
Operating Temperature Range0 to 85 °C
Output Current15 A
Polyphaseno yes/no
Sense ResistorRsense, DCR
Switch Current15 A
Synchronousyes yes/no
Vin Max60 V
Vin Min4 V
Vout Max24 V
Vout Maximum24V
Vout Min0.8 V
Vref Accuracy Over Temp1 %

Eco Plan


Moldel Line

Series: LTC3891 (16)

Manufacturer's Classification

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

Other Names:


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