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  • 參數(shù)資料
    型號: L7980A
    廠商: STMICROELECTRONICS
    元件分類: 穩(wěn)壓器
    英文描述: 3.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
    封裝: ROHS COMPLIANT, HSOP-8
    文件頁數(shù): 1/44頁
    文件大?。?/td> 1247K
    代理商: L7980A
    July 2010
    Doc ID 15181 Rev 3
    1/44
    44
    L7980
    2 A step-down switching regulator
    Features
    2 A DC output current
    4.5 V to 28 V input voltage
    Output voltage adjustable from 0.6 V
    250 kHz switching frequency, programmable
    up to 1 MHz
    Internal soft-start and enable
    Low dropout operation: 100% duty cycle
    Voltage feed-forward
    Zero load current operation
    Overcurrent and thermal protection
    VFQFPN3x3-8L and HSOP8 package
    Applications
    Consumer:
    STB, DVD, DVD recorder, car audio, LCD TV
    and monitors
    Industrial:
    PLD, PLA, FPGA, chargers
    Networking: XDSL, modems, DC-DC modules
    Computer:
    Optical storage, Hard disk drive, Printers,
    Audio/graphic cards
    LED driving
    Description
    The L7980 is a step down switching regulator with
    2.5 A (minimum) current limited embedded power
    MOSFET, so it is able to deliver up to 2 A current
    to the load depending on the application
    conditions.
    The input voltage can range from 4.5 V to 28 V,
    while the output voltage can be set starting from
    0.6 V to VIN.
    Requiring a minimum set of external components,
    the device includes an internal 250 kHz switching
    frequency oscillator that can be externally
    adjusted up to 1 MHz.
    The QFN and the HSOP packages with exposed
    pad allow reducing the RthJA down to 60 °C/W
    and 40 °C/W respectively.
    Figure 1.
    Application circuit
    HSOP8 exposed pad
    VFQFPN8 3x3
    相關(guān)PDF資料
    PDF描述
    L7980 3.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
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    相關(guān)代理商/技術(shù)參數(shù)
    參數(shù)描述
    L7980ATR 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2 A Step-Down Reg 4.5V to 28V 250 kHz RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
    L7980TR 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2A DC 4.5 V to 28 V Adj 0.6V 250 kHz RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
    L7981 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Step-Down Reg 3A DC 4.5-28V 250Khz RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
    L7981A 制造商:STMicroelectronics 功能描述:POWER CONVERSION - Rail/Tube 制造商:STMicroelectronics 功能描述:3A Step-Down Reg 3.7A 4.5 to 28V 1MHz 制造商:ST 功能描述:3A STEP-DOWN SWITCHING REGULATOR
    L7981ATR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3 A Step-Down Reg 4.5V to 28V 250 kHz RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5