参数资料
| 型号： | NCP4671DMX12TCG |
| 厂商： | ON Semiconductor |
| 文件页数： | 19/23页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.2V .4A 6XDFN |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.2V |
| 输入电压： | 2.4 V ~ 5.25 V |
| 电压 - 压降（标准）： | 0.28V @ 400mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 400mA（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-XFDFN |
| 供应商设备封装： | 6-XDFN（1.2x1.2） |
| 包装： | 标准包装 |
| 其它名称： | NCP4671DMX12TCGOSDKR |
NCP4671
APPLICATION INFORMATION
A typical application circuit for the NCP4671 series is
shown in Figure 63. The NCP4671 has two independent
inputs, VBIAS pin is used for powering control part of the
LDO and its value is equal or higher than value of second
input pin VIN where voltage that has to be regulated is
connected.
NCP4671x
and ground pin of the NCP4671. Higher values and lower
ESR of capacitor C1 improves line transient response.
Output Decoupling Capacitor (C3)
A 2.2 m F or larger ceramic output decoupling capacitor is
sufficient to achieve stable operation of the IC. If a tantalum
capacitor is used, and its ESR is high, loop oscillation may
result. The capacitors should be connected as close as
VIN
VBIAS
VIN
VBIAS
VOUT
VOUT
possible to the output and ground pins. Larger values and
lower ESR improves dynamic parameters.
C1
1 m
C2
1 m
CE
GND
C3
2 m 2
Enable Operation
The enable pin CE may be used for turning the regulator
on and off. The regulator is switched on when CE pin voltage
is above logic high level. The enable pin has an internal pull
down current source. If the enable function is not needed
connect CE pin to VBIAS.
Figure 63. Typical Application Schematic
Dual rail architecture is appropriate when the regulator is
connected for example behind a buck DC/DC converter.
Bias voltage can be taken from input of the buck DC/DC
converter and as input voltage is used output of the buck
DC/DC converter as it is shown in Figure 64. Condition that
bias voltage must be higher than input voltage can be in this
schematic easy fulfilled.
Output Discharger
The D version includes a transistor between VOUT and
GND that is used for faster discharging of the output
capacitor. This function is activated when the IC goes into
disable mode.
Thermal
As power across the IC increases, it might become
necessary to provide some thermal relief. The maximum
power dissipation supported by the device is dependent
VIN
DC/DC
converter
C1
1 m
C2
1 m
NCP4671x
VIN
VBIAS VOUT
CE GND
VOUT
C3
2 m 2
upon board design and layout. Mounting pad configuration
on the PCB, the board material, and also the ambient
temperature affect the rate of temperature rise for the part.
That is to say, when the device has good thermal
conductivity through the PCB, the junction temperature will
be relatively low with high power dissipation applications.
PCB layout
Figure 64. Typical Application Schematic with DC/DC
Converter
Make VIN, VBIAS and GND line sufficient. If their
impedance is high, noise pickup or unstable operation may
result. Connect capacitors C1, C2 and C3 as close as possible
to the IC, and make wiring as short as possible.
Input Decoupling Capacitors (C1 and C2)
A 1 m F ceramic input decoupling capacitors should be
connected as close as possible to the VIN and VBIAS input
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| NCP4671DMX13TCG | 功能描述:低压差稳压器 - LDO 400 MA LDO REGULATOR 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 |
| NCP4671DMX15TCG | 功能描述:低压差稳压器 - LDO 400 MA LDO REGULATOR 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 |
| NCP4671DSN06T1G | 功能描述:低压差稳压器 - LDO 400 MA LDO REGULATOR 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 |
| NCP4671DSN09T1G | 功能描述:低压差稳压器 - LDO 400 MA LDO REGULATOR 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 |
| NCP4671DSN10T1G | 功能描述:低压差稳压器 - LDO 400 MA LDO REGULATOR 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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