RT9199GS datasheet(11/13 Pages) RICHTEK

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RT9199GS Datasheet(PDF) 11 Page - Richtek Technology Corporation

Part #	RT9199GS

Description	Cost-Effective, 2A Peak Sink/Source Bus Termination Regulator

PDF	13 Pages

Scroll/Zoom	100%

Manufacturer	RICHTEK [Richtek Technology Corporation]

Direct Link	http://www.richtek.com

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11 / 13 page

RT9199

DS9199-07

September 2007

www.richtek.com

As shown in Figure 12, the amount of copper area to which the SOP-8 (Exposed Pad) is mounted affects thermal

performance. When mounted to the standard SOP-8 (Exposed Pad) pad of 2 oz. copper (Figure 12.a),

θJA is 86°C/W.

Adding copper area of pad under the SOP-8 (Exposed Pad) (Figure 12.b) reduces the

θJA to 73°C/W. Even further,

increasing the copper area of pad to 70mm2 (Figure 12.d) reduces the

θJA to 65°C/W.

Figure 12. Thermal Resistance vs. Copper Area Layout Thermal Design

(a) Copper Area = 10mm2,

θJA = 86°C/W

(b) Copper Area = 30mm2,

θJA = 73°C/W

θJA = 68°C/W

(d) Copper Area = 70mm2,

θJA = 65°C/W

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