LM317J3 Datasheet, PDF (1/12 Pages) Cystech Electonics Corp. – Three Terminal 1.5A Adjustable

CYStech Electronics Corp.
Three Terminal 1.5A Adjustable Output
Positive Voltage Regulators
LM317J3
Spec. No. : C513J3
Issued Date : 2007.12.19
Revised Date : 2010.07.22
Page No. : 1/12
The LM317J3 is an adjustable 3–terminal positive voltage regulator capable of supplying in excess of 1.5A
over an output voltage range of 1.3 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 LM317J3 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 LM317J3 can be used as a precision current regulator.
● Output current up to 1.5 A
● Output voltage adjustable between 1.3 V and 37 V
● Internal over temperature protection
● Internal short circuit protection
● Safe–area compensation for output transistor
● Pb-free package
Standard Application
Vin
+
Cin
0.1μF
P^LL^M31³7¹⁷
IAdj
R2
Vout
R1
+
Cout
1.0μF
＊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.
Vout=1.25(1+R2/R1)+IAdjR2
Since IAdj is controlled to less than 100 μA, the
error associated with this term is negligible in
most applications.
Package Information
1 23
Pin Function
1
ADJ
2
OUTPUT
3
INPUT
TO-252
LM317J3
CYStek Product Specification