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LM2931AZ-5.0RP Fiches technique(PDF) 11 Page - ON Semiconductor |
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LM2931AZ-5.0RP Fiches technique(HTML) 11 Page - ON Semiconductor |
11 / 23 page LM2931, NCV2931 Series http://onsemi.com 11 0 50 100 150 200 250 300 0.0 0.6 1.0 1.2 1.4 1.8 010 20 30 25 15 5.0 L, LENGTH OF COPPER (mm) PD(max) for TA = 50°C RqJA L L 2.0 oz. Copper 0.4 1.6 0.2 0.8 30 40 50 60 70 80 1.0 1.5 2.0 2.5 3.0 3.5 010 20 30 25 15 5.0 L, LENGTH OF COPPER (mm) PD(max) for TA = 50°C Minimum Size Pad 2.0 oz. Copper L L Free Air Mounted Vertically RqJA Figure 26. 3−Pin and 5−Pin D2PAK Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length Figure 27. SOT−223 Thermal Resistance and Maximum Power Dissipation vs. P.C.B. Copper Length DEFINITIONS Dropout Voltage − The input/output voltage differential at which the regulator output no longer maintains regulation against further reductions in input voltage. Measured when the output decreases 100 mV from nominal value at 14 V input, dropout voltage is affected by junction temperature and load current. Line Regulation − The change in output voltage for a change in the input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that the average chip temperature is not significantly affected. Load Regulation − The change in output voltage for a change in load current at constant chip temperature. Maximum Power Dissipation − The maximum total device dissipation for which the regulator will operate within specifications. Bias Current − That part of the input current that is not delivered to the load. Output Noise Voltage − The rms AC voltage at the output, with constant load and no input ripple, measured over a specified frequency range. Long−Term Stability − Output voltage stability under accelerated life test conditions with the maximum rated voltage listed in the devices electrical characteristics and maximum power dissipation. |
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