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NCV571SN10T1G Datasheet(PDF) 8 Page - ON Semiconductor |
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NCV571SN10T1G Datasheet(HTML) 8 Page - ON Semiconductor |
8 / 11 page NCP571, NCV571 http://onsemi.com 8 Figure 20. Vin Vin GND Enable NC GND Vout Vout GND C1 C2 0.1 mF NL17SZ16 NCP571 0.1 mF 3.3 V 0 V Enable 2.7 V 2.7 V 0 V Hints Please be sure the Vin and GND lines are sufficiently wide. When the impedance of these lines is high, there is a chance to pick up noise or cause the regulator to malfunction. Set external components, especially the output capacitor, as close as possible to the circuit, and make leads as short as possible. Thermal As power across the NCP571 increases, it might become necessary to provide some thermal relief. The maximum power dissipation supported by the device is dependent upon board design and layout. Mounting pad configuration on the PCB, the board material, and also the ambient temperature effect the rate of temperature rise for the part. This is stating that when the NCP571 has good thermal conductivity through the PCB, the junction temperature will be relatively low with high power dissipation applications. The maximum dissipation the package can handle is given by: P D + T J(max) * TA RqJA If junction temperature is not allowed above the maximum 125 °C, then the NCP571 can dissipate up to 400 mW @ 25 °C. The power dissipated by the NCP571 can be calculated from the following equation: Ptot + Vin(max) IGND ) Iout * Vout *Iout If a 150 mA output current is needed then the ground current from the data sheet is 4.0 mA. |
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