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    首頁產(chǎn)品索引LR645

    LR645

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    FIXED/ADJUSTABLE HIGH INPUT VOLTAGE REGULATOR

     

    產(chǎn)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

      

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    型號制造商描述購買
    LR645N3-G-P013CAL-CHIP貼片電阻 0402 19.1KΩ ±1% 1/16W ±100ppm/℃ 立即購買
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    LR645N8-GKnowles貼片電容(MLCC) 1812 150pF ±1% 100V C0G(NP0) 立即購買
    LR645N5-GVishay插件電阻 - 20KΩ ±0.1% 1W ±25ppm/℃ 立即購買
    LR645N3-GVishay插件電阻 - 45.2KΩ ±0.1% 1W ±25ppm/℃ 立即購買
    LR645LG-GVishay插件電阻 - 39KΩ ±0.1% 1W ±25ppm/℃ 立即購買

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