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    參數(shù)資料
    型號(hào): ISL8502
    廠商: Intersil Corporation
    英文描述: 2.5A Synchronous Buck Regulator with Integrated MOSFETs
    中文描述: 包2.5a同步降壓穩(wěn)壓器,集成的MOSFET
    文件頁(yè)數(shù): 6/19頁(yè)
    文件大小: 526K
    代理商: ISL8502
    6
    FN6389.0
    January 17, 2007
    Ramp Amplitude
    Δ
    V
    OSC
    V
    IN
    = 5V
    0.470
    V
    Modulator Gain
    V
    VIN
    /
    Δ
    V
    OSC
    By Design
    8
    -
    Maximum Duty Cycle
    D
    MAX
    f
    OSC
    = 500kHz
    88
    %
    Maximum Duty Cycle
    D
    MAX
    f
    OSC
    = 1.2MHz
    76
    %
    REFERENCE VOLTAGE
    Reference Voltage
    V
    REF
    0.600
    V
    System Accuracy
    -1.0
    +1.0
    %
    FB Pin Bias Current
    ±80
    ±200
    nA
    SOFT-START
    Soft-Start Current
    I
    SS
    20
    30
    40
    μ
    A
    Enable Soft-Start Threshold
    0.8
    1.0
    1.2
    V
    Enable Soft-Start Threshold Hysteresis
    12
    mV
    Enable Soft-Start Voltage High
    2.8
    3.2
    3.8
    V
    ERROR AMPLIFIER
    DC Gain
    Note 3
    88
    dB
    Gain-Bandwidth Product
    GBWP
    Note 3
    15
    MHz
    Maximum Output Voltage
    3.9
    4.4
    V
    Slew Rate
    SR
    5
    V/
    μ
    s
    INTERNAL MOSFETS
    Upper MOSFET r
    DS(ON)
    r
    DS_Upper
    VCC = 5V
    180
    m
    Ω
    Lower MOSFET r
    DS(ON)
    r
    DS_Lower
    VCC = 5V
    90
    m
    Ω
    PGOOD
    PGOOD Threshold
    V
    FB/
    V
    REF
    Rising Edge Hysteresis 1%
    107
    111
    115
    %
    Falling Edge Hysteresis 1%
    86
    90
    93
    %
    PGOOD Rising Delay
    t
    PGOOD_DELAY
    f
    OSC
    = 500kHz
    250
    ms
    PGOOD Leakage Current
    V
    PGOOD
    = 5.5V
    5
    μ
    A
    PGOOD Low Voltage
    V
    PGOOD
    Note 3
    0.10
    V
    PGOOD Sinking Current
    I
    PGOOD
    Note 3
    0.5
    mA
    PROTECTION
    Positive Current Limit
    I
    POC
    VCC = 5V, IOC from PHASE to PGND.
    Notes 3, 6
    2.8
    3.5
    4.0
    A
    Negative Current Limit
    I
    NOC
    VCC = 5V, IOC from VIN to PHASE.
    Notes 3, 6
    2.2
    3.0
    3.5
    A
    Undervoltage Level
    V
    FB
    /V
    REF
    76
    80
    84
    %
    Thermal Shutdown Setpoint
    T
    SD
    Note 3
    150
    °C
    Thermal Recovery Setpoint
    T
    SR
    Note 3
    130
    °C
    Electrical Specifications
    Refer to Block and Simplified Power System Diagrams and Typical Application Schematics. Operating
    Conditions Unless Otherwise Noted: Vin = 12V, or V
    CC
    = 5V
    ±
    10%, T
    A
    = -40°C to +85°C. Typical are at
    T
    A
    = +25°C.
    (Continued)
    PARAMETER
    SYMBOL
    TEST CONDITIONS
    MIN
    TYP
    MAX
    UNITS
    ISL8502
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