RT9166B View Datasheet(PDF) - Richtek Technology
Part Name
Description
Manufacturer
RT9166B Datasheet PDF : 9 Pages
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RT9166B
PD(MAX) = (125°C − 25°C) / (60°C/W) = 0.847W for
SOT-89 package
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(MAX) and thermal
resistance, θJA. For RT9166B packages, the derating curve
in Figure 1 allows the designer to see the effect of rising
ambient temperature on the maximum power dissipation.
1.00
Four-Layer PCB
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
0
25
50
75
100
125
Ambient Temperature (°C)
Figure 1. Derating Curve for RT9166B Package
www.richtek.com
8
DS9166B-01 April 2011
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