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LM317E3 PDF预览

LM317E3

更新时间: 2024-11-21 05:42:03
品牌 Logo 应用领域
全宇昕 - CYSTEKEC 稳压器
页数 文件大小 规格书
10页 213K
描述
Three Terminal Adjustable Output Positive Voltage Regulators

LM317E3 数据手册

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Spec. No. : C513E3  
Issued Date : 2003.04.09  
Revised Date :2005.05.17  
Page No. : 1/10  
CYStech Electronics Corp.  
Three Terminal Adjustable Output  
Positive Voltage Regulators  
LM317E3  
The LM317E3 is an adjustable 3–terminal positive voltage regulator capable  
of supplying in excess of 1.5 A over an output voltage range of 1.2 V to 37 V.  
This voltage regulator is exceptionally easy to use and requires only two ex-  
ternal resistors to set the output voltage. Further, it employs internal current  
limiting, thermal shutdown and safe area compensation, making it essentially  
blow–out proof.  
TO-220AB  
The LM317E3 serves a wide variety of applications including local, on-card  
regulation. This device can also be used to make a programmable output regu-  
lator, or by connecting a fixed resistor between the adjustment and output, the  
LM317E3 can be used as a precision current regulator.  
Output Current in Excess of 1.5 A  
Output Adjustable between 1.2 V and 37 V  
Internal Thermal Overload Protection  
Internal Short Circuit Current Limiting Constant with Temperature  
Output Transistor Safe–Area Compensation  
Floating Operation for High Voltage Applications  
Eliminates Stocking many Fixed Voltages  
Standard Application  
Cin is required if regulator is located an appreciate  
distance from power supply filter.  
**Cout is not needed for stability, however, it does  
Vin  
Vout  
LM317  
improve transient response.  
R1  
IAdj  
+
Vout=1.25(1+R2/R1)+IAdjR2  
Cin  
0.1µF  
+ Cout  
1.0µF  
Since IAdj is controlled to less than 100 µA, the  
error associated with this term is negligible in  
most applications.  
R2  
Maximum Ratings  
Rating  
Symbol  
Value  
40  
Unit  
V
Input-Output Voltage Differential  
Power Dissipation  
VI-VO  
W
TA=25℃  
PD  
θJA  
θJC  
Internally Limited  
/W  
/W  
Thermal Resistance, Junction-to-Ambient  
65  
Thermal Resistance, Junction-to-Case  
5.0  
Operating Junction Temperature Range  
Storage Temperature Range  
TJ  
Tstg  
-40 to +125  
-65 to +150  
LM317E3  
CYStek Product Specification  

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