UNISONIC TECHNOLOGIES CO., LTD
LM317 LINEAR INTEGRATED CIRCUIT
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Copyright © 2008 Unisonic Technologies Co., Ltd QW-R101-009,K
HIGH CURRENT 1.3V TO 37V
ADJUSTABLE VOLTAGE
REGULATOR
DESCRIPTION
The UTC LM317 is an adjustable 3-terminal positive voltage
regulator, designed to supply 1A of output current with voltage
adjustable from 1.3V ~ 37V.
FEATURES
*Output voltage adjustable from 1.3V ~ 37V
*Output current in excess of 1A
*Internal short circuit protection.
*Internal over temperature protection.
*Output transistor safe area compensation
TO-220
1
TO-263
1
TO-252
1
TO-3
TO-220F
1
1
SOT-223
1
2
Lead-free: LM317K
Halogen-free: LM317G
ORDERING INFORMATION
Ordering Number Pin Assignment
Normal Lead Free Halogen Free Package 1 2 3
Packing
LM317-AA3-R LM317K-AA3-R LM317G-AA3-R SOT-223 ADJ O I Tape Reel
LM317-TA3-T LM317K-TA3-T LM317G-TA3-T TO-220 ADJ O I Tube
LM317-TF3-T LM317K-TF3-T LM317G-TF3-T TO-220F ADJ O I Tube
LM317-TN3-R LM317K-TN3-R LM317G-TN3-R TO-252 ADJ O I Tape Reel
LM317-TN3-T LM317K-TN3-T LM317G-TN3-T TO-252 ADJ O I Tube
LM317-TQ2-R LM317K-TQ2-R LM317G-TQ2-R TO-263 ADJ O I Tape Reel
LM317-TQ2-T LM317K-TQ2-T LM317G-TQ2-T TO-263 ADJ O I Tube
LM317-T30-Y LM317K-T30-Y LM317G-T30-Y TO-3 I ADJ O Tray
Note: 1. Pin Assignment: I:VIN O:VOUT
2. Pin 3 on TO-3 is case
LM317K-AA3-R
(1)Packing Type
(2)Package Type
(3)Lead Plating
(1) R: Tape Reel, T: Tube, Y: Tray
(2) AA3: SOT-223, TA3: TO-220, TF3: TO-220F,
TN3: TO-252, TQ2: TO-263, T30: TO-3
(3) G: Halogen Free, K: Lead Free,
Blank: Pb/Sn
LM317 LINEAR INTEGRATED CIRCUIT
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BLOCK DIAGRAM
LM317 LINEAR INTEGRATED CIRCUIT
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ABSOLUTE MAXIMUM RATINGS (Ta=25°C, unless otherwise specified)
PARAMETER SYMBOL RATINGS UNIT
Input - Output Voltage Difference VIN-VOUT 40 V
Power Dissipation PD Internal limited
Junction Temperature TJ +125 °C
Operating Temperature TOPR 0 ~ +125 °C
Storage Temperature TSTG -40 ~ +150 °C
Note:1. Absolute maximum ratings are stress ratings only and functional device operation is not implied. The device
could be damaged beyond Absolute maximum ratings.
THERMAL DATA
PARAMETER SYMBOL RATINGS UNIT
TO-252 112
TO-220/TO-220F 54
TO-263 64
SOT-223 165
Junction-to-Ambient
TO-3
θJA
35
/W℃
TO-252 12
TO-220/TO-220F 5
TO-263 5
SOT-223 23
Junction-to-Case
TO-3
θJC
3
/W℃
ELECTRICAL CHARACTERISTICS
(VIN-VOUT=5V, IOUT=10mA, Ta=25°C, unless otherwise specified.)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Line Regulation ΔVOUT/VOUT 3V≦VIN-VOUT≦40V 0.01 0.04 %/V
VOUT≦5V 5 25 mV
Load Regulation ΔVOUT 10mA≦IOUT≦1A VOUT≧5V 0.1 0.5 %
Adjustable Pin Current IADJ 50 100 μA
Adjustable Pin Current Change ΔIADJ 3V≦VIN-VOUT≦40V,
10mA≦IOUT≦1A, PD≦20W 0.2 5 μA
Reference Voltage VREF 3V≦VIN-VOUT≦40V,
10mA≦IOUT≦1A, PD≦20W 1.20 1.25 1.30 V
Temperature Stability TMIN≦TJ≦TMAX 0.7 %/VOUT
Minimum Load Current for Regulation IL(MIN) V
IN-VOUT=40V 3.5 10 mA
Maximum Output Current IO(MAX) V
IN-VOUT=40V, PD≦20W 0.2 0.3 A
RMS Noise vs. %of VOUT eN 10HZ≦f≦10KHZ 0.003 %/VOUT
CADJ=0 65
Ripple Rejection RR VOUT=10V,f=120HZ CADJ=10μF 66 80 dB
Note: CADJ is connected between Adjust pin and Ground.
LM317 LINEAR INTEGRATED CIRCUIT
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APPLICATION CIRCUITS
UTC LM317
1
2
3
1
2
3
VOUTVIN
VADJ
R2
240
50k
D1
1N4001
10 F
IOUT
IADJ
R1 R2
VoUT
VIN
R1
1.25V
R1
IO(MIN)=( VREF
R1+R2
)+IADJ=1.25V
R1+R2
5mA<IOUT<100mA
Fig.3 Soft Start Application Fig.4 Constant Current Application
UTC LM317
)+IADJ=
VREF
IO(MAX)=(
LM317 LINEAR INTEGRATED CIRCUIT
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TYPICAL CHARACTERISTICS
0255075100125
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
Temperature
Output Voltage Deviation, ∆VOUT (%)
-50 -25 0 25 50 75 100 125
35
40
45
50
55
60
Adjustment Current, IADJ (μA)
Temperature
Load Regulation vs. temperature Adjustment Current vs. Temperature
VIN=15V
VOUT=10V
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
