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LM29150T-1.8 参数 Datasheet PDF下载

LM29150T-1.8图片预览
型号: LM29150T-1.8
PDF下载: 下载PDF文件 查看货源
内容描述: 1.5A非常L.D.O稳压器 [1.5A Very L.D.O Voltage Regulator]
分类和应用: 稳压器调节器输出元件局域网
文件页数/大小: 11 页 / 801 K
品牌: HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
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1.5A Very L.D.O Voltage Regulator  
LM29150/29151/29152  
APPLICATION INFORMATION  
The LM29150 are high performance low-dropout voltage regulators suitable for all moderate to high current  
voltage regulator applications. Their 350mV dropout voltage at full load makes them especially valuable in  
battery powered systems and as high efficiency noise filters in "post-regulator" applications. Unlike older  
NPN-pass transistor designs, dropout performance of the PNP output of these devices is limited merely by  
the low VCE saturation voltage.  
The LM29150 family of regulators is fully protected from damage due to fault conditions. Current Limiting is  
provided. This limiting is linear; output current under overload conditions is constant. Thermal shutdown  
disables the device when the die temperature exceeds the 125maximum safe operating temperature.  
Transient protection allows device survival even when the input voltage spikes between -20V and +60V.  
When the input voltage exceeds about 35V to 40V, the over voltage sensor temporarily disables the  
regulator.  
Figure 1. Linear regulators require only two capacitors for operation.  
Thermal Design  
Linear regulators are simple to use. The most complicated design parameters to consider are thermal  
characteristics. Thermal design requires the following application-specific parameters:  
- Maximum ambient temperature, TA  
- Output Current, IOUT  
- Output Voltage, VOUT  
- Input Voltage, VIN  
First, we calculate the power dissipation of the regulator from these numbers and the device parameters  
from this datasheet.  
PD=IOUT(1.01VIN-VOUT  
)
Where the ground current is approximated by 1% of IOUT. Then the heat sink thermal resistance is  
determined with this formula:  
T
- T  
A
JMAX  
(
)
θ
=
- θ +θ  
SA  
JC CS  
P
D
θCS  
Where TJMAX 125and  
is between 0 and 2/W.  
Nov. 2009 - Rev. 1.2  
- 9 -  
HTC