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    參數(shù)資料
    型號(hào)： MAX1961
    廠商： Maxim Integrated Products, Inc.
    英文描述： 2.35V to 5.5V, 0.5% Accurate, 1MHz PWM Step-Down Controllers with Voltage Margining
    中文描述： 2.35V至5.5V、0.5%精度、1MHz PWM降壓型控制器，帶有電壓裕量控制
    文件頁(yè)數(shù)： 9/29頁(yè)
    文件大小： 455K
    代理商： MAX1961
    M
    2.35V to 5.5V, 0.5% Accurate, 1MHz PWM
    Step-Down Controllers with Voltage Margining
    _______________________________________________________________________________________
    9
    Pin Description
    PIN
    MAX1960 MAX1961 MAX1962
    NAME
    FUNCTION
    1
    1
    1
    CLKOUT
    Clock Output. Connect to FSET/SYNC of a second converter to operate 180
    °
    out-of-
    phase. CLKOUT swings from V
    CC
    to GND. CLKOUT is low in shutdown (see the
    Operating Frequency and Synchronization
    section)
    .
    2
    2
    2
    FSET/SYNC
    Frequency Set and Synchronization. Connect to GND for 500kHz operation,
    connect to V
    CC
    for 1MHz operation, or drive with clock signal to synchronize
    (between 450kHz and 1200kHz).
    3
    3
    —
    ILIM
    Current Limit. Connect a resistor from ILIM to GND to set the current-sense
    threshold voltage. Connect ILIM to V
    DD
    to select the default threshold of 75mV.
    E nab e. D ve hi g h for nor m al op er ati on. D ve l ow or connect to GN D for shutd ow n m od e.
    —
    —
    3
    EN
    —
    4
    4
    SEL
    Preset Output Voltage Select. Allows the output to be set to one of four preset
    voltages (1.5V, 1.8V, 2.5V, and 3.3V). For the MAX1962, FB must be connected to
    V
    DD
    if SEL is to be used (see the
    Setting the Output Voltage
    section)
    .
    4
    —
    —
    N.C.
    No Connection. Not internally connected.
    —
    8
    5
    OUT
    Output. Connect to the output. Used to sense the output voltage for internal
    feedback and current sense.
    5
    5
    —
    CTL1
    6
    6
    —
    CTL2
    Control Pins. Controls voltage margining and shutdown. Connect both CTL1 and
    CTL2 high for normal operation. Connect both CTL1 and CTL2 low for shutdown.
    Connect CTL1 high and CTL2 low for +4% voltage margining. Connect CTL1 low
    and CTL2 high for -4% voltage margining. If voltage margining is not to be used,
    connect CTL1 and CTL2 together and use to enable/shutdown the device.
    —
    —
    6
    CS
    C ur ent- S ense Inp ut. C onnect to the j uncti on of the cur ent- sense r esi stor and the
    i nd uctor The M AX 1962 cur ent- sense thr eshol d i s 50m V m easur ed fr om C S to O U T.
    7
    7
    7
    AV
    DD
    Filtered Supply from V
    DD
    . Connect a 1μF bypass capacitor. AV
    DD
    is forced to V
    CC
    in shutdown.
    Do not apply an external load to AV
    DD
    .
    8
    —
    8
    FB
    Feed b ack Inp ut. The feed b ack thr eshol d i s 0.8V C onnect to the center of a r esi sti ve
    vol ag e- d vi d er fr om the outp ut to GN D to set the outp ut vol ag e to 0.8V or g eater On
    the M AX 1962, connect FB to V
    DD
    to sel ect p eset outp ut vol ag es ( see S E L)
    9
    10
    9
    10
    9
    10
    COMP
    REF
    Compensation Pin. COMP is forced to GND in shutdown, UVLO, or thermal fault.
    Reference Output. V
    REF
    = 1.28V. Bypass with a 0.22μF capacitor to GND.
    Analog Ground. Connect to the PC board analog ground plane. Connect the PC
    board analog ground plane and power ground planes with a single connection.
    11
    11
    11
    GND
    12
    12
    12
    V
    DD
    C har g e- P um p O utp ut. P ovi d es r eg ul ated 5V to p ow er the IC and g ate d ver s.
    Byp ass w h a 4.7μF cer am c cap aci or for op er ati ng fr eq uenci es b etw een 450kH z
    and 950kH z. Byp ass w h a 2.2μF cer am c cap aci or for 1M H z op er ati on. V
    DD
    i s
    i nter nal y for ced to V
    CC
    i n shutd ow n. D o not ap p y an exter nal l oad to V
    DD
    .
    13
    13
    13
    DL
    Low-Side MOSFET Synchronous Rectifier Gate-Driver Output. DL is high in
    shutdown.
    14
    14
    14
    PGND
    Power Ground. Connect to the PC board power ground plane.
    相關(guān)PDF資料
    PDF描述
    MAX1962 2.35V to 5.5V, 0.5% Accurate, 1MHz PWM Step-Down Controllers with Voltage Margining
    MAX1962EEP 2.35V to 5.5V, 0.5% Accurate, 1MHz PWM Step-Down Controllers with Voltage Margining
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    相關(guān)代理商/技術(shù)參數(shù)
    參數(shù)描述
    MAX1961EEP 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
    MAX1961EEP+ 功能描述:DC/DC 開關(guān)控制器 1MHz PWM Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
    MAX1961EEP+T 功能描述:DC/DC 開關(guān)控制器 1MHz PWM Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
    MAX1961EEP-T 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
    MAX1962EEP 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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