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ML7818FA Datasheet(PDF) 8 Page - Micro Electronics |
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ML7818FA Datasheet(HTML) 8 Page - Micro Electronics |
8 / 11 page 1. Application Circuit Positive/Negative Voltage Supply Note : 2. Note in Application Circuit ( 1 ) ( 2 ) REV B * In case of negative voltage regulator, reverse the SBD and capacitor direction. In the following explain only the positive regulator unless otherwise specified. However they can apply to the negative voltage regulator by easy change. In the above positive and negative power supply application, D1 and D2 should be connected. If D1 and D2 are not connected, either of positive or negative power supply circuit may not turns on. If the higher voltage (above the rated value) or lower voltage (GND-0.5V) is supplied to the input terminals, the IC may be destroyed. To avoid such a case, a zener diode or other parts of the surge supressor should be connected as shown below. If the higher voltage than the input terminal is supplied to the output terminal, the IC may be destroyed. To avoid input terminal short to the GND or the stored voltage in the capacitor back to the output terminal, by the large value capacitor connecting to the output terminal application, the SBD should be required as shown below; COM -Vin +Vin 0.33uF 0.33uF OUT COM IN 79 series OUT GND IN 78 series -Vo +Vo D2 D1 0.1uF 0.1uF Vin Vo IN 1 OUT 3 Capacitor + Ze ner Diode R Vo Vin Capacitor + IN 1 OUT 3 L Diode Vin Vo Capacitor + IN 1 OUT 3 DIODE Page 8 of 11 |
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