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参数资料
| 型号： | NCV8665DS50G |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V .15A D2PAK-5 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 5V |
| 输入电压： | 5.5 V ~ 45 V |
| 电压 - 压降（标准）： | 0.25V @ 150mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 150mA |
| 电流 - 限制（最小）： | 150mA |
| 工作温度： | -40°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-6，D²Pak（5 引线+接片），TO-263BA |
| 供应商设备封装： | D2PAK-5 |
| 包装： | 管件 |
NCV8665
V I
t
V Q
< Reset Reaction Time
V Q,rt
t
V D
V RO
Reset
Delay Time
Reset
Reaction
Time
dVD
dt
+
Reset Charge Current
CD
Upper Timing Threshold V DU
Lower Timing Threshold V DL
t
t
Power ? on ? Reset
Thermal
Shutdown
Voltage Dip
at Input
Undervoltage
Secondary
Spike
Overload
at Output
Figure 11. Reset Timing
Calculating Power Dissipation
in a Single Output Linear Regulator
The maximum power dissipation for a single output
regulator (Figure 12) is:
In some cases, none of the packages will be sufficient to
dissipate the heat generated by the IC, and an external
heatsink will be required.
PD(max) + [VI(max) * VQ(min)] IQ(max)
) VI(max)Iq
(1)
V I
I I
SMART
REGULATOR ?
I Q
V Q
R q JA + 150C * A
T
PD
R q JA + R q JC ) R q CS ) R q SA
where
V I(max) is the maximum input
voltage,
V Q(min) is the minimum output
voltage,
I Q(max) is the maximum output
current for the application,
I q is the quiescent current the regulator consumes
at I Q(max) .
Once the value of P D(max) is known, the maximum
permissible value of R q JA can be calculated:
(2)
The value of R q JA can then be compared with those in the
package section of the data sheet. Those packages with
R q JA ’s less than the calculated value in Equation NO TAG
will keep the die temperature below 150 ° C.
Control
} Features
Iq
Figure 12. Single Output Regulator with Key
Performance Parameters Labeled
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 :
(3)
http://onsemi.com
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCV8665DS50R4G | 功能描述:低压差稳压器 - LDO NCV8665 5L D2PAK 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 |
| NCV8667 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:150 mA LDO Regulator with Enable, Reset and Early Warning |
| NCV866710D150R2G | 功能描述:低压差稳压器 - LDO 5.0V / 150MA LDO 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 |
| NCV866710D250R2G | 功能描述:低压差稳压器 - LDO 5.0V / 150MA LDO 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 |
| NCV866752D250R2G | 功能描述:低压差稳压器 - LDO 5.0V / 150MA LDO 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 |
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