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REG104GA-2.5 参数 Datasheet PDF下载

REG104GA-2.5图片预览
型号: REG104GA-2.5
PDF下载: 下载PDF文件 查看货源
内容描述: DMOS 1A低压降稳压器 [DMOS 1A Low-Dropout Regulator]
分类和应用: 稳压器调节器光电二极管输出元件
文件页数/大小: 21 页 / 764 K
品牌: BB [ BURR-BROWN CORPORATION ]
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POWER DISSIPATION  
5
4
3
2
1
0
The REG104 is available in two different package configura-  
tions. The ability to remove heat from the die is different for  
each package type and, therefore, presents different consid-  
erations in the printed circuit board (PCB) layout. The PCB  
area around the device that is free of other components  
moves the heat from the device to the ambient air. While it  
is difficult to impossible to quantify all of the variables in a  
thermal design of this type, performance data for several  
configurations are shown in Figure 9. In all cases the PCB  
copper area is bare copper, free of solder resist mask, and  
not solder plated. All examples are for 1-ounce copper. Using  
heavier copper will increase the effectiveness in moving the  
heat from the device. In those examples where there is  
copper on both sides of the PCB, no connection has been  
provided between the two sides. The addition of plated  
through holes will improve the heat sink effectiveness.  
CONDITIONS  
#1  
#2  
#3  
#4  
0
25  
50  
75  
100  
125  
Ambient Temperature (°C)  
CONDITION  
PACKAGE  
PCB AREA  
θJA  
1
2
3
4
DDPAK  
SOT-223  
DDPAK  
4in2 Top Side Only  
4in2 Top Side Only  
None  
27°C/W  
53°C/W  
65°C/W  
110°C/W  
Power dissipation depends on input voltage and load condi-  
tions. Power dissipation is equal to the product of the aver-  
age output current times the voltage across the output  
element, VIN to VOUT voltage drop.  
SOT-223  
0.5in2 Top Side Only  
FIGURE 9. Maximum Power Dissipation versus Ambient  
Temperature for the Various Packages and  
PCB Heat Sink Configurations.  
PD = (VIN VOUT ) IOUT(AVG)  
Power dissipation can be minimized by using the lowest  
possible input voltage necessary to assure the required  
output voltage.  
REG104  
SBVS025G  
11