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LM317MDT

更新时间： 2024-11-17 21:54:51
品牌 Logo 应用领域
安森美 - ONSEMI 稳压器调节器输出元件
页数 文件大小 规格书
16页 156K
描述
Three-Terminal Adjustable Output Positive Voltage Regulator

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LM317MDT 数据手册

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LM317M  
500 mA Adjustable Output,  
Positive Voltage Regulator  
The LM317M is an adjustable three−terminal positive voltage  
regulator capable of supplying in excess of 500 mA over an output  
voltage range of 1.2 V to 37 V. This voltage regulator is exceptionally  
easy to use and requires only two external resistors to set the output  
voltage. Further, it employs internal current limiting, thermal  
shutdown and safe area compensation, making it essentially blow−out  
proof.  
http://onsemi.com  
Heatsink surface  
connected to Pin 2  
The LM317M serves a wide variety of applications including local,  
on−card regulation. This device also makes an especially simple  
adjustable switching regulator, a programmable output regulator, or by  
connecting a fixed resistor between the adjustment and output, the  
LM317M can be used as a precision current regulator.  
TO−220AB  
T SUFFIX  
CASE 221A  
Features  
1
• Output Current in Excess of 500 mA  
• Output Adjustable between 1.2 V and 37 V  
• Internal Thermal Overload Protection  
• Internal Short Circuit Current Limiting  
• Output Transistor Safe−Area Compensation  
• Floating Operation for High Voltage Applications  
• Eliminates Stocking Many Fixed Voltages  
• Pb−Free Packages are Available  
2
3
2
SOT−223  
ST SUFFIX  
CASE 318E  
1
3
4
DPAK  
DT SUFFIX  
CASE 369C  
2
1
3
V
in  
V
out  
Heatsink Surface (shown as terminal 4 in  
case outline drawing) is connected to Pin 2.  
V
in  
V
out  
LM317M  
R
1
240  
I
Adj  
Adjust  
**  
C
O
1.0mF  
*
PIN ASSIGNMENT  
+
C
in  
0.1mF  
1
2
3
Adjust  
V
out  
R
2
V
in  
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 12 of this data sheet.  
ꢀ* = C is required if regulator is located an appreciable distance from power supply filter.  
in  
** = C is not needed for stability, however, it does improve transient response.  
O
R
2
+ 1.2 ꢁꢁꢁ ꢁꢁǒ1 ) Ǔ) I  
V
out  
ꢁR  
2
Adjꢁ  
R
1
DEVICE MARKING INFORMATION  
See general marking information in the device marking  
section on page 13 of this data sheet.  
Since I is controlled to less than 100 mA, the error associated with this  
Adj  
term is negligible in most applications.  
Figure 1. Simplified Application  
Semiconductor Components Industries, LLC, 2004  
1
Publication Order Number:  
August, 2004 − Rev. 12  
LM317M/D  
1234567...16

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LM317MDT 替代型号

型号 品牌 替代类型 描述 数据表
LM317MBDTG ONSEMI

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