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参数资料
| 型号： | NCP630GD2TG |
| 厂商： | ON Semiconductor |
| 文件页数： | 7/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.47V 3A D2PAK-5 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.47V |
| 输入电压： | 最高 12V |
| 电压 - 压降（标准）： | 1V @ 3A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 3A |
| 电流 - 限制（最小）： | 3A |
| 工作温度： | 0°C ~ 125°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 |
NCP630
APPLICATION INFORMATION
PD +
Input Capacitor
The minimum capacitance required for stability is a 68 m F
aluminum electrolytic or tantalum capacitor. The maximum
ESR allowed for stability is 5.0 W . The capacitor should be
place as close as possible to the input of the device.
The placement of a ceramic capacitor in parallel is not
recommend due to possible instabilities.
Output Capacitor
A minimum output capacitor value of 33 m F is required for
stability. The type of capacitor can be aluminum electrolytic
or tantalum capacitor. ESR can vary up to a maximum of
2.0 ohms for stability. The capacitor should be placed as
close as possible to the output of the device.
The placement of a ceramic capacitor in parallel is not
recommend due to possible instabilities.
Sense Pin
The sense pin of the NCP630G will need to be connected
near the output voltage. This provides great advantages
when the linear regulator can’t be near the load. The sense
pin will monitor the load and allow the linear regulator to
adjust for losses in the line between itself and the load. Thus
it will provide good accuracy for a remote load.
ADJ Pin
The typical application circuits for the fixed and
adjustable output regulators are shown in Figures 1 and 2.
The adjustable devices develop and maintain the nominal
1.216 V reference voltage between the adjust and ground
pins. The adjust pin current, I adj , is typically 40 nA and
normally lower than the current flowing through R1 and R2,
thus it generates a small output voltage error that can usually
be ignored. For the fixed output devices R1 and R2 are
included within the device.
80
Reverse Current
Some situations might occur were the output pin is raised
to a voltage while the input pin is at zero volts. This situation
will not damage the device.
If the output voltage is raised to a higher voltage than the
input voltage a diode is recommended from output to input
with the anode connect to the output pin.
Thermal Considerations
This series contains an internal thermal limiting circuit
that is designed to protect the regulator in the event that the
maximum junction temperature is exceeded. When
activated, typically at 165 ° C, the regulator output switches
off and then back on as the die cools. As a result, if the device
is continuously operated in an overheated condition, the
output will appear to be oscillating. This feature provides
protection from a catastrophic device failure due to
accidental overheating. It is not intended to be used as a
substitute for proper heatsinking. The maximum device
power dissipation can be calculated by:
TJ(max) * TA
R q JA
The devices are available in surface mount D 2 PAK
package. The package has an exposed metal tab that is
specifically designed to reduce the junction to air thermal
resistance, R q JA , by utilizing the printed circuit board
copper as a heat dissipater. Figure 11 shows typical R q JA
values that can be obtained from a square pattern using
economical single sided 2.0 ounce copper board material.
The final product thermal limits should be tested and
quantified in order to insure acceptable performance and
reliability. The actual R q JA can vary considerably from the
graphs shown. This will be due to any changes made in the
copper aspect ratio of the final layout, adjacent heat sources,
and air flow.
3.5
P D(max) for T A = 50 ° C
70
Free Air
Mounted
3.0
60
50
40
Vertically
Minimum
Size Pad
L
2.0 oz. Copper
L
2.5
2.0
1.5
R q JA
30
0
5.0
10
15
20
25
30
1.0
L, LENGTH OF COPPER (mm)
Figure 11. 3?Pin and 5?Pin D 2 PAK
Thermal Resistance and Maximum Power
Dissipation versus P.C.B. Copper Length
http://onsemi.com
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP630GD2TR4 | 功能描述:低压差稳压器 - LDO 3.47V 3A Fast 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 |
| NCP630GD2TR4G | 功能描述:低压差稳压器 - LDO 3.47V 3A Fast 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 |
| NCP631 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:3.0 A Linear Voltage Regulator with Soft Start |
| NCP631/D | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:3.0 A Linear Voltage Regulator with Soft Start |
| NCP631_06 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:3.0 A Linear Voltage Regulator with Soft−Start |
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