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Datasheet Linear Technology LTC3539

ManufacturerLinear Technology

2A, 1MHz/2MHz Synchronous Step-Up DC/DC Converters


  • Download » Datasheet PDF, 194 Kb, Revision: C, File uploaded: Sep 21, 2017
    LTC3539/LTC3539-2 - 2A, 1MHz/2MHz Synchronous Step-Up DC/DC Converters
    Docket ↓
    2A, 1MHz/2MHz
    Synchronous Step-Up
    DC/DC Converters
    FEATURES DESCRIPTION Delivers 3.3V at 900mA From 2 Alkaline/NiMH Cells Delivers 5V at 900mA From a Lithium-Polymer
    n V Start-Up Voltage: 700mV
    n 1.5V to 5.25V V
    OUT Range
    n Up to 94% Efficiency
    n V > V
    OUT Operatio В±1.5% Feedback Voltage Tolerance
    n 1MHz (LTC3539) or 2MHz (LTC3539-2) Fixed
    Frequency Operatio Output Disconnect
    n Selectable Burst ModeВ® or PWM Operatio 10ВµA Quiescent Current
    n Logic Controlled Shutdown: VOUT operation
    and short circuit protection features.
    The high speed operation of the LTC3539 demands careful
    attention to board layout. A careless layout will result in
    reduced performance. Figure 1 shows the recommended ...




ArchitectureConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current Mode
Demo BoardsDC1260A-A,DC1260A-BDC1260A-A,DC1260A-BDC1260A-A,DC1260A-B
Design ToolsLTspice FileLTspice FileLTspice File
Export Controlnonono
FeaturesOutput Disconnect, Burst ModeOutput Disconnect, Burst ModeOutput Disconnect, Burst Mode
Frequency, kHz200020002000
Frequency Adjust Range1MHz or 2MHz1MHz or 2MHz1MHz or 2MHz
Integrated Inductornonono
Ishutdown, µA0.010.010.01
Isupply, mA0.010.010.01
Number of Outputs111
Operating Temperature Range, °C0 to 850 to 850 to 85
Switch Current, A2.62.62.6
Vin Max, V555
Vin Min, V0.50.50.5
Vin Min Startup, V0.70.70.7
Vout Max, V5.255.255.25
Vout Min, V1.51.51.5
Vswitch Max, V666

Eco Plan

Other Options


Design Notes

  • Download » Design Notes - DN485 PDF, 106 Kb, File published: Oct 26, 2010
    Complete Energy Utilization Improves Run Time of a Supercap Ride-Through Application by 40%
    Docket ↓
    Complete Energy Utilization Improves Run Time of a Supercap
    Ride-Through Application by 40% – Design Note 485
    George H. Barbehenn
    Many electronic systems require a local power source that
    allows them to ride through brief main power interruptions without shutting down. Some local power sources
    must be available to carry out a controlled shutdown if
    the main power input is abruptly removed. Complete Energy Utilization Maximizes Run Time
    of Supercap Ride-Through Application
    Figure 1 shows a complete 3.3V/200mA ride-through application that maximizes the amount of power extracted
    from the supercap to support the load. A battery backup can supply power in the event of a
    mains shutdown, but batteries are not well suited to
    this particular application. Although batteries can store
    significant amounts of energy, they cannot deliver much
    power due to their significant source impedance. Also,
    batteries have п¬Ѓnite lives of ~2 to 3 years, and the maintenance required for rechargeable batteries is substantial. The LTC В®4425 complete 2A supercapacitor charger. It
    clamps the individual cell voltages to ensure that the
    cells do not overvoltage during charging and balances
    the cells throughout charge and discharge. The main components of the ride-through application
    include: The LTC3606 micropower buck regulator produces
    the regulated 3.3V output. Supercapacitors are well suited to such ride-through
    applications. Their low source impedance allows them
    to supply significant power for a relatively short time, ...

Moldel Line

Series: LTC3539 (3)

Manufacturer's Classification

  • Power Management > Switching Regulator > Step-Up (Boost) Regulators > Micropower Boost | Internal Power Switch Boost

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