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| 型号： | NCV8501D100G |
| 厂商： | ON Semiconductor |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 10V .15A 8-SOIC |
| 产品变化通告： | 1Q2012 Discontinuation 30/Mar/2012 |
| 标准包装： | 98 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 10V |
| 输入电压： | 最高 45 V |
| 电压 - 压降（标准）： | 0.4V @ 150mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 150mA |
| 电流 - 限制（最小）： | 151mA |
| 工作温度： | -40°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 管件 |
NCV8501 Series
UNDERSTANDING THE NCV8501 ENABLE PIN
INPUT CURRENT
VCC
CALCULATING POWER DISSIPATION IN A
SINGLE OUTPUT LINEAR REGULATOR
The maximum power dissipation for a single output
regulator (Figure 22) is:
D5
PD(max) + [VIN(max) * VOUT(min)] IOUT(max)
ENABLE
R1
20K
R2
1.2M
D2
P1
D1
~3.85V
N1
D3
D4 Internal
power
rail
(eq. 1)
) VIN(max)IQ
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, and
GND
Z1
11V Z2
7V
5 μ A
(max)
Z3
D6
Internal
reference
1.25V
I Q is the quiescent current the regulator consumes at
I OUT(max) .
Once the value of P D(max) is known, the maximum
permissible value of R q JA can be calculated:
R Q JA + 150C * A
T
Figure 21. NCV8501 Enable Function Equivalent
Circuit
Z1, R1, and Z2 provide ESD and overvoltage protection.
Note that, for ENABLE pin voltages in excess of 10 V, an
external series resistor is required to limit the current into
Z1.
For ENABLE pin voltages less than +7 V, the 5 m A
(maximum value) current source dominates the input
current, as the opposing P1 base current is negligible by
(eq. 2)
PD
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 2 will keep
the die temperature below 150 ° C.
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.
comparison.
For ENABLE pin voltages between +7 V and +11 V, the
input current is given by:
V IN
I IN
SMART
REGULATOR ?
I OUT
V OUT
5 m A + ((V ENABLE ? 7) / 20 k W )
For ENABLE pin voltages in excess of 10 V (Z1
breakover voltage can be as low as 10 V), the input current
is dominated by the external series resistor. For the case
where V ENABLE = 12 V; R EXT = 10 k W , the input current can
be up to (2 V/10 k W ), = 200 m A.
The ENABLE threshold is that voltage required to
achieve ~3.85 V at the base of N1, or approximately (3.85 V
? 2 Vbe). At +20 ° C, this threshold is ~2.55 V. At ? 40 ° C, it
can be as high as 3 V.
If the value of R EXT is increased to ~200 k W , to reduce
ENABLE input current, then the worst ? case drop across
R EXT must be added to 3 V to determine the effective
maximum ENABLE threshold. At V ENABLE < 7 V, we only
need to consider the 5 m A current sink.
Max effective threshold = 3 V + (5 m A * 220 k W )
= 3 V + 1.1 V
= 4.1 V
Control
} Features
I Q
Figure 22. Single Output Regulator with Key
Performance Parameters Labeled
100
90
80
70
60
50
40
0
200
400
600
800
Copper Area (mm 2 )
Figure 23. 16 Lead SOW (Exposed Pad), q JA as a
Function of the Pad Copper Area (2 oz. Cu
Thickness), Board Material = 0.0625 , G ? 10/R ? 4
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCV8501D100R2 | 功能描述:低压差稳压器 - LDO 10V 150mA w/ENABLE 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 |
| NCV8501D100R2G | 功能描述:低压差稳压器 - LDO 10V 150mA w/ENABLE 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 |
| NCV8501D25 | 功能描述:低压差稳压器 - LDO 2.5V 150mA w/ENABLE 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 |
| NCV8501D25G | 功能描述:低压差稳压器 - LDO 2.5V 150mA w/ENABLE 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 |
| NCV8501D25R2 | 功能描述:低压差稳压器 - LDO 2.5V 150mA w/ENABLE 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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