参数资料
型号: NCV8508DW50G
厂商: ON Semiconductor
文件页数: 19/26页
文件大小: 0K
描述: IC REG LDO 5V 16SOIC
标准包装: 47
稳压器拓扑结构: 正,固定式
输出电压: 5V
输入电压: 最高 45 V
电压 - 压降(标准): 0.45V @ 150mA
稳压器数量: 1
电流 - 限制(最小): 250mA
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.295",7.50mm 宽)
供应商设备封装: 16-SOIC W
包装: 管件
NCV8508
Table 3. SOIC 8 ? Lead EP Thermal RC Network Models
54 mm 2
717 mm 2
54 mm 2
717 mm 2
Cu Area
Cauer Network
Foster Network
C’s
C’s
Units
Tau
Tau
units
1
2
3
4
5
6
7
8
9
10
2.28E ? 06
1.08E ? 05
3.24E ? 05
9.71E ? 05
6.28E ? 04
7.13E ? 03
1.54E ? 02
6.16E ? 02
1.94E ? 01
1.52E+00
2.28E ? 06
1.08E ? 05
3.24E ? 05
9.71E ? 05
7.55E ? 04
1.49E ? 02
9.28E ? 02
1.72E ? 01
3.83E ? 01
2.41E+00
W ? s/C
W ? s/C
W ? s/C
W ? s/C
W ? s/C
W ? s/C
W ? s/C
W ? s/C
W ? s/C
W ? s/C
2.99E ? 07
4.40E ? 06
4.36E ? 05
3.59E ? 04
3.17E ? 03
0.030
0.341
2.909
16.126
54.334
2.99E ? 07
4.40E ? 06
4.36E ? 05
3.74E ? 04
4.59E ? 03
0.162
0.473
1.653
8.488
71.562
sec
sec
sec
sec
sec
sec
sec
sec
sec
sec
R’s
R’s
R’s
R’s
1
2
3
4
5
6
7
8
9
10
0.161
0.482
1.445
3.00
4.47
5.92
20.11
51.85
68.87
27.52
0.161
0.482
1.445
3.00
5.34
12.21
16.03
4.89
15.34
22.36
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
0.11
0.26
0.73
2.60
4.80
2.98
12.20
26.10
62.22
71.83
0.11
0.26
0.73
2.83
5.82
8.95
0.61
12.91
16.96
32.09
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
NOTE:
Bold face items in the Cauer network above, represent the package without the external thermal system. The Bold face items in
the Foster network are computed by the square root of time constant R(t) = 225 * sqrt(time(sec)). The constant is derived based
on the active area of the device with silicon and epoxy at the interface of the heat generation.
The Cauer networks generally have physical significance and may be divided between nodes to separate thermal behavior
due to one portion of the network from another. The Foster networks, though when sorted by time constant (as above) bear
a rough correlation with the Cauer networks, are really only convenient mathematical models. Cauer networks can be easily
implemented using circuit simulating tools, whereas Foster networks may be more easily implemented using mathematical
tools (for instance, in a spreadsheet program), according to the following formula:
S Ri
R(t) +
n
i + 1
1 ? e ? t taui
http://onsemi.com
19
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