首页产品索引LR645

    LR645

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    FIXED/ADJUSTABLE HIGH INPUT VOLTAGE REGULATOR

     

    产品信息

    LR645 is a high input voltage, low output current linear regulator. It has a 3-terminal fixed output voltage version available in TO-92, TO-220 and SOT-89 packages, as well as an adjustable voltage version available in an 8-lead SOIC package. The 3-terminal version functions like any other low voltage 3-terminal regulator except it allows the use of much higher input voltages. When used in a SMPS start-up circuit, it eliminates the need for large power resistors. In this application, current is drawn from the high voltage line only during start-up. Only leakage current flows after start-up, thereby reducing the continuous power dissipation to a few milliwatts.The adjustable voltage version allows trimming of the output voltage from 8.0 to 12V. This version can also be connected to an external depletion mode MOSFET for increased output current. When used in conjunction withdepletion mode MOSFET DN2540N5, an output current of up to 150mA is achieved.

      Accepts inputs from 15 to 450V

      Output currents up to 3.0mA continuous, 30mA peak

      Supply currenttypically 50µA

      Line regulation typically 0.1mV/V

      Output can be trimmed from 8.0 to 12V

      Output current can be increased to 150mA with external FET

      

    电路图、引脚图和封装图

    在线购买

    型号制造商描述购买
    LR645N3-G-P013CAL-CHIP贴片电阻 0402 19.1KΩ ±1% 1/16W ±100ppm/℃ 立即购买
    LR645N3-G-P003Omron Automation and Safety功率继电器 8A SPDT 24VDC 立即购买
    LR645N8-GKnowles贴片电容(MLCC) 1812 150pF ±1% 100V C0G(NP0) 立即购买
    LR645N5-GVishay插件电阻 - 20KΩ ±0.1% 1W ±25ppm/℃ 立即购买
    LR645N3-GVishay插件电阻 - 45.2KΩ ±0.1% 1W ±25ppm/℃ 立即购买
    LR645LG-GVishay插件电阻 - 39KΩ ±0.1% 1W ±25ppm/℃ 立即购买

    应用案例更多案例

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