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| 型号： | NCP1086T-033 |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/13页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V 1.5A TO220AB |
| 产品变化通告： | Product Discontinuation 27/Jun/2007 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 最高 7V |
| 电压 - 压降（标准）： | 1.05V @ 1.5A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.5A |
| 电流 - 限制（最小）： | 1.6A |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-3 |
| 供应商设备封装： | TO-220AB |
| 包装： | 管件 |
| 其它名称： | NCP1086T-033OS |
NCP1086
TJ + TA ) PD
R q JA
R q JA + R q JC ) R q CS ) R q SA
The case is connected to V OUT , and electrical isolation
may be required for some applications. Thermal compound
should always be used with high current regulators such as
these.
The thermal characteristics of an IC depend on the
following four factors:
1. Maximum Ambient Temperature T A ( ° C)
2. Power dissipation P D (W)
3. Maximum junction temperature T J ( ° C)
4. Thermal resistance junction to ambient R q JA ( ° C/W)
These four are related by the equation
(eq. 1)
The maximum ambient temperature and the power
dissipation are determined by the design while the
maximum junction temperature and the thermal resistance
depend on the manufacturer and the package type.
The maximum power dissipation for a regulator is:
PD(max) + {VIN(max) * VOUT(min)}IOUT(max) ) VIN(max)IQ
(eq. 2)
where:
V IN(max) is the maximum input voltage,
V OUT(min) is the minimum output voltage,
I OUT(max) is the maximum output current, for the application
I Q is the maximum quiescent current at I OUT(max) .
A heatsink effectively increases the surface area of the
Each material in the heat flow path between the IC and the
outside environment has a thermal resistance. Like series
electrical resistances, these resistances are summed to
determine R q JA , the total thermal resistance between the
junction and the surrounding air.
1. Thermal Resistance of the junction to case, R q JC
( ° C/W)
2. Thermal Resistance of the case to Heatsink, R q CS
( ° C/W)
3. Thermal Resistance of the Heatsink to the ambient
air, R q SA ( ° C/W)
These are connected by the equation:
(eq. 3)
The value for R q JA is calculated using Equation 3 and the
result can be substituted in Equation 1.
The value for R q JC is 3.5 ° C/W. For a high current
regulator such as the NCP1086 the majority of the heat is
generated in the power transistor section. The value for
R q SA depends on the heatsink type, while R q CS depends on
factors such as package type, heatsink interface (is an
insulator and thermal grease used?), and the contact area
between the heatsink and the package. Once these
calculations are complete, the maximum permissible value
of R q JA can be calculated and the proper heatsink selected.
For further discussion on heatsink selection, see application
note “Thermal Management,” document number
AND8036/D via our website at www.onsemi.com.
package to improve the flow of heat away from the IC and
into the surrounding air.
http://onsemi.com
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1086T-033G | 功能描述:低压差稳压器 - LDO 3.3V 1.5A Commercial Temp RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| NCP1086T-33 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1.5 A Adjustable and 3.3 V Fixed Output Linear Regulator |
| NCP1086T-ADJ | 功能描述:低压差稳压器 - LDO 1.25-5.5V ADJ 1.5A RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| NCP1086T-ADJG | 功能描述:低压差稳压器 - LDO 1.25-5.5V ADJ 1.5A Commercial Temp RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| NCP1090 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Integrated IEEE 802.3af PoE-PD Interface Controller |
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