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LM2931S-5.0 Datasheet(PDF) 10 Page - Texas Instruments |
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LM2931S-5.0 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 29 page LM2931-N SNOSBE5G – MARCH 2000 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Maximum Power Dissipation (TO-263) (1) On/Off Threshold Figure 32. Figure 33. Output Capacitor ESR Figure 34. (1) The maximum power dissipation is a function of maximum junction temperature TJmax, total thermal resistance θJA, and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJmax − TA)/θJA. If this dissipation is exceeded, the die temperature will rise above 150°C and the LM2931-N will go into thermal shutdown. For the LM2931-N in the TO-92 package, θJA is 195°C/W; in the SOIC-8 package, θJA is 160°C/W, and in the TO-220 package, θJA is 50°C/W; in the DDPAK/TO-263 package, θJA is 73°C/W; and in the 6-Bump DSBGA package θJA is 290°C/W. If the TO-220 package is used with a heat sink, θJA is the sum of the package thermal resistance junction-to-case of 3°C/W and the thermal resistance added by the heat sink and thermal interface.If the TO-263 package is used, the thermal resistance can be reduced by increasing the P.C. board copper area thermally connected to the package: Using 0.5 square inches of copper area, θJA is 50°C/W; with 1 square inch of copper area, θJA is 37°C/W; and with 1.6 or more square inches of copper area, θJA is 32°C/W. 10 Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LM2931-N |
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