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LD3870-4.7V Folha de dados(PDF) 4 Page - Unisonic Technologies |
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LD3870-4.7V Folha de dados(HTML) 4 Page - Unisonic Technologies |
4 / 7 page UTC LD3870 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R102-027,B Connect control terminal to VIN terminal The quiescent current can be reduced by using a resistance “R”. Instead, it increases the minimum operating voltage. For further information, please refer to Figure ”Output Voltage vs. Control Voltage”. ② In use of ON/OFF CONTROL: VIN VOUT CONTROL NOISE BYPASS GND (ceramic or tantalum) R VOUT VIN UTC LD3870 4.7 μF Cp=0.01 μF 0.1 μF State of control terminal: * ”H” Output is enables. * ”L”or “open” Output is disabled. * Noise bypass Capacitance Cp Noise bypass capacitance Cp reduces noise generated by hand-gap reference circuit. Noise level and ripple rejection will be improved when larger Cp is used. Use of smaller Cp value may cause oscillation. Use the Cp value of 0.01uF greater to avoid the problem. |
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