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L4979D-E Datasheet(PDF) 17 Page - STMicroelectronics |
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L4979D-E Datasheet(HTML) 17 Page - STMicroelectronics |
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17 / 22 page  DS3717 Rev 12 17/22 L4979D-E, L4979MD Package and PCB thermal data 21 Equation 2: pulse calculation formula where = tP/T Figure 12. Thermal fitting model of Vreg in SO-20 Table 12. SO-20 thermal parameter Area (cm2)Footprint 2 R1 (°C/W) 4 R2 (°C/W) 2 R3 (°C/W) 2.2 R4 (°C/W) 10 R5 (°C/W) 15 R6 (°C/W) 35 18 C1 (W.s/°C) 0.0003 C2 (W.s/°C) 0.0025 C3 (W.s/°C) 0.015 C4 (W.s/°C) 0.15 C5 (W.s/°C) 1.5 C6 (W.s/°C) 4 7 ZTH RTH ZTHtp 1 – + = GAPGCFT00161 |
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