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Datasheet Linear Technology LT1777

Manufacturer:Linear Technology
Series:LT1777

Low Noise Step-Down Switching Regulator

Datasheets

  • Download » Datasheet, PDF, 286 Kb, Revision: F
    LT1777 - Low Noise Step-Down Switching Regulator
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    LT1777
    Low Noise Step-Down
    Switching Regulator U FEATURES








    ■ DESCRIPTIO The LT ®1777 is a Buck (step-down) regulator designed for
    noise sensitive applications. It contains a dI/dt limiting
    circuit programmed via a small external inductor in the
    switching path. Internal circuitry also generates controlled
    dV/dt ramp rates. Programmable dI/dt Limit
    Internally Limited dV/dt
    High Input Voltage: 48V Max
    700mA Peak Switch Rating
    True Current Mode Control
    100kHz Fixed Operating Frequency
    Synchronizable to 250kHz
    Low Supply Current in Shutdown: 30µA ...

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Packaging

 LT1777CS#PBFLT1777CS#TRPBFLT1777IS#PBFLT1777IS#TRPBF
PackageSO-16SO-16SO-16SO-16
Package CodeSSSS

Parametrics

 LT1777CS#PBFLT1777CS#TRPBFLT1777IS#PBFLT1777IS#TRPBF
ArchitectureConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current Mode
Demo BoardsDC242ADC242ADC242ADC242A
Design ToolsLTspice ModelLTspice ModelLTspice ModelLTspice Model
Export Control, yes/nonononono
FeaturesLow EMI, Adjustable Slew Rate, External SynchronizationLow EMI, Adjustable Slew Rate, External SynchronizationLow EMI, Adjustable Slew Rate, External SynchronizationLow EMI, Adjustable Slew Rate, External Synchronization
Frequency, kHz100100100100
Frequency Sync Range130kHz - 250kHz130kHz - 250kHz130kHz - 250kHz130kHz - 250kHz
Integrated Inductor, yes/nonononono
Ishutdown, µA12121212
Isupply, mA0.620.620.620.62
Max Phases1111
Monolithic, yes/noyesyesyesyes
Number of Outputs1111
Operating Temperature Range, °C0 to 700 to 70-40 to 85-40 to 85
Output Current, A0.440.440.440.44
Polyphase, yes/nonononono
Switch Current, A0.70.70.70.7
Synchronous, yes/nonononono
TopologyBuckBuckBuckBuck
Vin Max, V48484848
Vin Min, V7777
Vout Max, V30303030
Vout Maximum.85VIN.85VIN.85VIN.85VIN
Vout Min, V1.241.241.241.24
Vref Accuracy Over Temp, %1.21.21.21.2

Eco Plan

 LT1777CS#PBFLT1777CS#TRPBFLT1777IS#PBFLT1777IS#TRPBF
RoHSCompliantCompliantCompliantCompliant

Manufacturer's Classification

  • Power Management > Switching Regulator > Ultralow Noise Regulators
  • Power Management > Switching Regulator > Step-Down (Buck) Regulators > Internal Power Switch Buck | High Input Voltage Buck

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