• 快速發布采購 管理采購信息

    LT3840 PDF Datasheet瀏覽和下載

    型號:
    LT3840
    PDF下載:
    下載PDF文件 在線瀏覽文檔
    內容描述:
    [60V DC-DC]
    文件大小:
    285 K
    文件頁數:
    24 Pages
    品牌Logo:
    品牌名稱:
    LINER [ LINEAR TECHNOLOGY ]


     瀏覽型號LT3840的Datasheet PDF文件第2頁瀏覽型號LT3840的Datasheet PDF文件第3頁瀏覽型號LT3840的Datasheet PDF文件第4頁瀏覽型號LT3840的Datasheet PDF文件第5頁瀏覽型號LT3840的Datasheet PDF文件第6頁瀏覽型號LT3840的Datasheet PDF文件第7頁瀏覽型號LT3840的Datasheet PDF文件第8頁瀏覽型號LT3840的Datasheet PDF文件第9頁 
    FeaTures
    n
    n
    LT3840
    Wide Input Range
    Synchronous Regulator Controller
    with Accurate Current Limit
    DescripTion
    The
    is a high voltage synchronous step-down
    switching regulator controller capable of operating from
    a 2.5V to 60V supply.
    The LT3840’s low quiescent current, when configured for
    user selectable Burst Mode operation, helps extend run
    time in battery-powered systems by increasing efficiency
    at light loads. The LT3840 uses a constant frequency,
    current mode architecture. High current applications are
    possible with large N-channel gate drivers capable of
    driving multiple low R
    DS(ON)
    MOSFETs.
    An integrated buck-boost switching regulator generates
    a 7.5V bias supply voltage for MOSFET gate drive and IC
    power allowing higher efficiency operation over the entire
    input voltage range and eliminating the need for an external
    bias voltage. An accurate current limit set point regulates
    the maximum output current. A current monitor reports
    the average output current.
    L,
    LT, LTC, LTM, Linear Technology, Burst Mode, and the Linear logo are registered
    trademarks of Linear Technology Corporation. All other trademarks are the property of their
    respective owners.
    n
    n
    n
    n
    n
    n
    n
    n
    n
    n
    Wide Input Range: 2.5V to 60V
    Integrated Buck-Boost Supply for 7.5V MOSFET
    Gate Drive
    Programmable Constant-Current Operation with
    Current Monitor Output
    Low I
    Q
    : 75μA, 12V
    IN
    to 3.3V
    OUT
    Selectable Low Output Ripple Burst Mode
    ?
    Operation
    V
    OUT
    Up to 60V
    Adjustable and Synchronizable: 50kHz to 1MHz
    Internal OVLO Protects for Input Transients Up to 80V
    Accurate Input Overvoltage and Undervoltage Threshold
    Programmable Soft-Start with Voltage Tracking
    Power Good and Output OVP
    28-Lead TSSOP and 38-Lead 4mm × 6mm QFN Packages
    applicaTions
    n
    n
    n
    Automotive Supplies
    Industrial Systems
    Distributed DC Power Systems
    Typical applicaTion
    High Efficiency Synchronous Step-Down Converter
    V
    IN
    4V TO 60V
    68μF
    ×2
    1μF
    33μH
    100
    95
    AUXBST AUXSW1
    EN
    V
    IN
    AUXVIN
    UVLO
    OVLO
    PG
    SYNC
    MODE
    RT
    V
    C
    49.9k
    20k
    1500pF
    100pF
    IMON
    ICOMP
    7.68k
    470pF
    3840 TA01a
    12V
    IN
    to 3.3V
    OUT
    Efficiency
    AUXSW2
    INTV
    CC
    90
    EFFICIENCY (%)
    1.5μH
    2m
    V
    OUT
    3.3V
    20A
    330μF
    ×2
    4.7μF
    85
    80
    75
    70
    65
    60
    55
    50
    0
    5
    10
    15
    LOAD CURRENT (A)
    20
    3840 TA01b
    LT3840
    BOOST
    1μF
    TG
    SW
    BG
    SENSE
    +
    SENSE
    FB
    GND
    ICTRL
    16.9k
    10k
    TK/SS
    2200pF
    3840fa
    For more information
    1
    狠狠干狠狠