LP38859 datasheet(13/21 Pages) TI1

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LP38859 Datasheet(PDF) 13 Page - Texas Instruments

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Part #	LP38859

Description	3A Fast-Response High-Accuracy LDO Linear Regulator with Soft-Start

PDF	21 Pages

Scroll/Zoom	100%

Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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13 / 21 page

LP38859

www.ti.com

SNVS337D – JUNE 2006 – REVISED OCTOBER 2011

Figure 28.

θJA vs Copper (1 Ounce) Area for the DDPAK/TO-263 package

Figure 28 shows that increasing the copper area beyond 1 square inch produces very little improvement. The

minimum value for

θJA for the DDPAK/TO-263 package mounted to a PCB is 32°C/W.

Figure 29 shows the maximum allowable power dissipation for DDPAK/TO-263 packages for different ambient

temperatures, assuming

θJA is 35°C/W and the maximum junction temperature is 125°C.

Figure 29. Maximum power dissipation vs ambient temperature for the DDPAK/TO-263 package

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