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参数资料
| 型号： | NCP4589DSN25T1G |
| 厂商： | ON Semiconductor |
| 文件页数： | 26/30页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.5V .3A SOT23 |
| 标准包装： | 3,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.5V |
| 输入电压： | 最高 5.25V |
| 电压 - 压降（标准）： | 0.34V @ 300mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 300mA（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
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NCP4589
TYPICAL CHARACTERISTICS
6.45
4.30
Chip Enable
2.15
0.00
4.0
3.0
2.0
1.0
0.0
I OUT = 50 mA
I OUT = 300 mA
I OUT = 1 mA
* 1.0
0
20
40
60
80
100 120 140 160 180 200
t ( m s)
Figure 86. Shutdown, 3.3 V Version D,
V IN = 4.3 V
APPLICATION INFORMATION
A typical application circuit for NCP4589 series is shown
in Figure 87.
down current source. If enable function is not needed
connect CE pin to V IN .
VIN
C1
1 m
NCP4589
VIN VOUT
CE
AE
GND
C2
1 m
VOUT
Current Limit
This regulator includes fold-back type current limit
circuit. This type of protection doesn’t limit current up to
current capability in normal operation, but when over
current occurs, the output voltage and current decrease until
the over current condition ends. Typical characteristics of
this protection type can be observed in the Output Voltage
versus Output Current graphs shown in the typical
Figure 87. Typical Application Schematic
Input Decoupling Capacitor (C1)
A 1 m F ceramic input decoupling capacitor should be
connected as close as possible to the input and ground pin of
the NCP4589. Higher values and lower ESR improves line
transient response.
Output Decoupling Capacitor (C2)
A 1 m F ceramic output decoupling capacitor is sufficient
to achieve stable operation of the IC. If tantalum capacitor
is used, and its ESR is high, the loop oscillation may result.
If output capacitor is composed from few ceramic capacitors
in parallel, the operation can be unstable. The capacitor
should be connected as close as possible to the output and
ground pin. Larger 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 CE pin voltage
is above logic high level. The enable pin has internal pull
characteristics chapter of this datasheet.
Output Discharger
The D version includes a transistor between V OUT and
GND that is used for faster discharging of the output
capacitor. This function is activated when the IC goes into
disable mode.
Auto ECO and Fast Mode
The NCP4589 has two operation modes that have impact
on supply current and transient response at low output
current. These two modes can be selected by AE pin. If AE
pin is at low level Auto ECO mode is available. Please, see
supply current vs. output current charts.
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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP4589DSN30T1G | 功能描述:低压差稳压器 - LDO 300 MA, 3-MODE 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 |
| NCP4589DSN33T1G | 功能描述:低压差稳压器 - LDO 300 mA 3-MODE 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 |
| NCP4589DSQ12T1G | 功能描述:低压差稳压器 - LDO 300 MA, 3-MODE 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 |
| NCP4589DSQ18T1G | 功能描述:低压差稳压器 - LDO 300 MA, 3-MODE 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 |
| NCP4589DSQ25T1G | 功能描述:低压差稳压器 - LDO 300 MA, 3-MODE 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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