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参数资料
| 型号： | NCP4632BDT08T5G |
| 厂商： | ON Semiconductor |
| 文件页数： | 12/14页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 0.8V 3A DPAK-5 |
| 标准包装： | 3,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 0.8V |
| 输入电压： | 1.6 V ~ 5.25 V |
| 电压 - 压降（标准）： | 0.91V @ 3A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 3A（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-252-6，DPak（5 引线 + 接片） |
| 供应商设备封装： | D-Pak 5-引线 |
| 包装： | 带卷 (TR) |
| 其它名称： | NCP4632BDT08T5G-ND NCP4632BDT08T5GOSTR |
NCP4632
APPLICATION INFORMATION
A typical application circuit for NCP4632 series is shown
in Figure 38.
V OUT + 0.8
1 )
R1
R2
) R1
I ADJ
(eq. 1)
VIN
NCP4632 (Fixed)
VOUT
The current consumption I ADJ flowing into the ADJ pin
can be described by Equation 2.
VIN
VOUT
R1
I ADJ + V SET
R1
RADJ
(eq. 2)
GND
C1
10 m
CE
SENSE
C2
10 m
By choosing R1 << R ADJ (R ADJ is typically around
1.6 M W ), this value becomes very small in which case we
can omit the term R1 x I ADJ in Equation 1. The simplified
equation for the output voltage calculation is shown in
Equation 3.
V OUT + 0.8
1 )
R1
VIN
NCP4632 (Adj)
VIN VOUT
R1
VOUT
(eq. 3)
R2
The resistor divider should be kept to values below
500 k W to ensure stability.
C1
10 m
CE
GND
VADJ
R2
C2
10 m
Figure 38. Typical Application Schematic
Input Decoupling Capacitor (C1)
A 10 m F ceramic input decoupling capacitor should be
connected as close as possible to the input and ground pin of
oncapc7EG
V SET
V OUT
the NCP4632. Higher values and lower ESR improves line
transient response.
Output Decoupling Capacitor (C2)
A 10 m F 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.
Using multiple ceramic capacitors in parallel should be
avoided if possible as this can lead to unstable operation. The
Output capacitor should be connected as close as possible to
the output and ground pin. Larger capacitance values and
lower ESR improves dynamic parameters.
Enable Operation
The Enable pin (CE) may be used for turning the regulator
on and off. The regulator is switched on when the CE pin
voltage is above logic high level. The Enable pin has an
internal pull down current source with a 300 nA current
capability. If the enable function is not needed, connect CE
pin to VIN pin.
Output Voltage Setting
For the Adjustable version of the NCP4632, the output
voltage can be adjusted by using an external resister divider.
Figure 39. Output Voltage Setting
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
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.
The output voltage can be calculated using Equation 1.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP4632DDT08EVB | 制造商:ON Semiconductor 功能描述:PO - LDO & VREGS - Bulk |
| NCP4632DDT08T5G | 功能描述:低压差稳压器 - LDO 3A LOW INPUT VOLTAGE 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 |
| NCP4632DDT15EVB | 制造商:ON Semiconductor 功能描述:PO - LDO & VREGS - Bulk |
| NCP4632DDT15T5G | 功能描述:低压差稳压器 - LDO 3A LOW INPUT VOLTAGE 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 |
| NCP4632DDT28EVB | 制造商:ON Semiconductor 功能描述:PO - LDO & VREGS - Bulk |
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