LM317F3 Datasheet, PDF (1/11 Pages) Cystech Electonics Corp. – Three Terminal Adjustable Output

CYStech Electronics Corp.
Three Terminal Adjustable Output
Positive Voltage Regulators
LM317F3
Spec. No. : C513F3
Issued Date : 2003.05.24
Revised Date :2010.07.22
Page No. : 1/11
The LM317F3 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
TO-263
blow–out proof.
The LM317F3 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 LM317F3 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
P^LL^M31³7¹⁷
IAdj
+
Cin
0.1μF
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.
Maximum Ratings
Rating
Input-Output Voltage Differential
Power Dissipation
TA=25℃
Thermal Resistance, Junction-to-Ambient
Thermal Resistance, Junction-to-Case
Operating Junction Temperature Range
Storage Temperature Range
LM317F3
Symbol
Value
Unit
VI-VO
40
V
PD
θJA
θJC
TOPR
Tstg
Internally Limited
60
3.0
0 to +125
-65 to +150
W
℃/W
℃/W
℃
℃
CYStek Product Specification