参数资料
型号: NCV4299D233G
厂商: ON Semiconductor
文件页数: 18/23页
文件大小: 0K
描述: IC REG LDO 3.3V .15A 14-SOIC
标准包装: 55
稳压器拓扑结构: 正,固定式
输出电压: 3.3V
输入电压: 4.4 V ~ 45 V
电压 - 压降(标准): 0.22V @ 100mA
稳压器数量: 1
电流 - 输出: 150mA
电流 - 限制(最小): 250mA
工作温度: -40°C ~ 150°C
安装类型: 表面贴装
封装/外壳: 14-SOIC(0.154",3.90mm 宽)
供应商设备封装: 14-SOICN
包装: 管件
NCV4299
R q JA + R q JC ) R q CS ) R q SA
Heatsinks
A heatsink effectively increases the surface area of the
package to improve the flow of heat away from the IC and
into the surrounding air.
Each material in the heat flow path between the IC and the
outside environment will have a thermal resistance. Like
series electrical resistances, these resistances are summed to
determine the value of R q JA :
(eq. 7)
where:
R q JC = the junction ? to ? case thermal resistance,
R q CS = the case ? to ? heatsink thermal resistance, and
R q SA = the heatsink ? to ? ambient thermal resistance.
R q JC appears in the package section of the data sheet. Like
R q JA , it too is a function of package type. R q CS and R q SA are
functions of the package type, heatsink and the interface
between them. These values appear in heatsink data sheets
of heatsink manufacturers. Thermal, mounting, and
heatsinking are discussed in the ON Semiconductor
application note AN1040/D, available on the
ON Semiconductor website.
http://onsemi.com
18
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