器件名称: LM317L3
功能描述: Three Terminal Adjustable Output Positive Voltage Regulators
文件大小: 213.24KB 共9页
简 介:CYStech Electronics Corp.
Three Terminal Adjustable Output Positive Voltage Regulators
Spec. No. : C513L3 Issued Date : 2003.04.09 Revised Date :2005.05.03 Page No. : 1/9
LM317L3
The LM317L3 is an adjustable 3–terminal positive voltage regulator capable of supplying in excess of 1.5A 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. The LM317L3 serves a wide variety of applications including local, on-card regulation. This device can also be used to make a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM317L3 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
Vin
LM317 PL317
+
Vout R1
+
＊Cin is required if regulator is located an appreciate distance from power supply filter. ＊＊Cout is not needed for stability, however, it does improve transient response.
IAdj
R2
Cin
Cout
0.1F
1.0F
Vout=1.25(1+R2/R1)+IAdjR2 Since IAdj is controlled to……
