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RT9012-CMGQW Datasheet(PDF) 10 Page - Richtek Technology Corporation

Part # RT9012-CMGQW
Description  300mA Dual LDO Regulator with POR
Download  11 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9012-CMGQW Datasheet(HTML) 10 Page - Richtek Technology Corporation

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RT9012
Preliminary
10
DS9012-06 August 2007
www.richtek.com
For recommended operating conditions specification of
RT9012, where TJ(MAX) is the maximum junction
temperature of the die (125
°C) and TA is the operated
ambient temperature. The junction to ambient thermal
resistance (
θJA is layout dependent) for WDFN-8L 2x2
package is 108
°C/W on the standard JEDEC 51-3 single-
layer thermal test board. The maximum power dissipation
at TA = 25
°C can be calculated by following formula :
PD(MAX) = ( 125
°C − 25°C ) / 108 = 0.926W for
WDFN-8L 2x2 packages
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(MAX) and thermal
resistance
θJA . For RT9012 packages, the Figure 3 of
derating curves allows the designer to see the effect of
rising ambient temperature on the maximum power
allowed.
Figure 3. Derating Curves for RT9012 Packages
Power Dissipation vs. Ambient Temperature
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
25
50
75
100
125
Ambient Temperature (
°C)
WDFN-8L 2x2


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