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TS39103CP518RO Datasheet(PDF) 6 Page - Taiwan Semiconductor Company, Ltd |
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TS39103CP518RO Datasheet(HTML) 6 Page - Taiwan Semiconductor Company, Ltd |
6 / 8 page TS39103 1A Ultra Low Dropout Voltage Regulator with Multi-Function 6/8 Version: A08 Application Information (Continue) Copper area lay out information Determine the power dissipation requirements for the design along with the maximum ambient temperature at which the device will be operated. Refer to power dissipation with copper area curve, which shows safe operating curves for three different ambient temperatures with 25 oC, 50oC, 85oC. From these curves, the minimum amount of copper can be determined by knowing the maximum power dissipation required. PD = (VIN- VOUT) * IOUT + VIN * IGND If we used a 5.0V output device and a 6V input at an output current of 350mA, then the power dissipation is as follows: PD = (6.0V- 5.0V) * 350mA + 5V * 4mA PD = 350mW + 20mW PD = 370mW If the maximum ambient temperature is 85 oC and the power dissipation is as above 375mW, the curve is shows that the required area of copper is 80mm 2. |
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