UNISONIC TECHNOLOGIES CO., LTD
LM317
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.
LINEAR INTEGRATED CIRCUIT
1
TO-220
1
TO-220F
1
TO-263
1
TO-252
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
1
SOT-223
2
1
TO-3
Lead-free:
LM317K
Halogen-free: LM317G
ORDERING INFORMATION
Ordering Number
Normal
Lead Free
LM317-AA3-R
LM317K-AA3-R
LM317-TA3-T
LM317K-TA3-T
LM317-TF3-T
LM317K-TF3-T
LM317-TN3-R
LM317K-TN3-R
LM317-TN3-T
LM317K-TN3-T
LM317-TQ2-R
LM317K-TQ2-R
LM317-TQ2-T
LM317K-TQ2-T
LM317-T30-Y
LM317K-T30-Y
Note: 1. Pin Assignment: I:V
IN
O:V
OUT
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
Halogen Free
LM317G-AA3-R
LM317G-TA3-T
LM317G-TF3-T
LM317G-TN3-R
LM317G-TN3-T
LM317G-TQ2-R
LM317G-TQ2-T
LM317G-T30-Y
Package
SOT-223
TO-220
TO-220F
TO-252
TO-252
TO-263
TO-263
TO-3
Pin Assignment
1
2
3
ADJ
O
I
ADJ
O
I
ADJ
O
I
ADJ
O
I
ADJ
O
I
ADJ
O
I
ADJ
O
I
I
ADJ
O
Packing
Tape Reel
Tube
Tube
Tape Reel
Tube
Tape Reel
Tube
Tray
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Copyright © 2008 Unisonic Technologies Co., Ltd
1 of 5
QW-R101-009,K
LM317
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R101-009,K
LM317
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Input - Output Voltage Difference
V
IN
-V
OUT
40
V
Power Dissipation
P
D
Internal limited
Junction Temperature
T
J
+125
°C
Operating Temperature
T
OPR
-40 ~ +85
°C
Storage Temperature
T
STG
-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
TO-252
TO-220/TO-220F
TO-263
SOT-223
TO-3
TO-252
TO-220/TO-220F
TO-263
SOT-223
TO-3
SYMBOL
RATINGS
112
54
64
165
35
12
5
5
23
3
UNIT
Junction-to-Ambient
θ
JA
℃
/W
Junction-to-Case
θ
JC
℃
/W
ELECTRICAL CHARACTERISTICS
(V
IN
-V
OUT
=5V, I
OUT
=10mA, Ta=25°C, unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
Line Regulation
ΔV
OUT
/V
OUT
3V≦V
IN
-V
OUT
≦40V
V
OUT
≦5V
Load Regulation
ΔV
OUT
10mA≦I
OUT
≦1A
V
OUT
≧5V
Adjustable Pin Current
Adjustable Pin Current Change
Reference Voltage
Temperature Stability
Minimum Load Current for Regulation
Maximum Output Current
RMS Noise vs. %of V
OUT
Ripple Rejection
I
ADJ
ΔI
ADJ
V
REF
I
L(MIN)
I
O(MAX)
eN
RR
3V≦V
IN
-V
OUT
≦40V,
10mA≦I
OUT
≦1A,
P
D
≦20W
3V≦V
IN
-V
OUT
≦40V,
10mA≦I
OUT
≦1A,
P
D
≦20W
T
MIN
≦T
J
≦T
MAX
V
IN
-V
OUT
=40V
V
IN
-V
OUT
=40V, P
D
≦20W
10H
Z
≦f≦10KH
Z
V
OUT
=10V,f=120H
Z
C
ADJ
=0
C
ADJ
=10μF
MIN
TYP
0.01
5
0.1
50
0.2
1.20
1.25
0.7
3.5
0.3
0.003
65
80
MAX
0.04
25
0.5
100
5
1.30
10
UNIT
%/V
mV
%
μA
μA
V
%/V
OUT
mA
A
%/V
OUT
dB
0.2
66
Note: C
ADJ
is connected between Adjust pin and Ground.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 5
QW-R101-009,K
LM317
APPLICATION CIRCUITS
LINEAR INTEGRATED CIRCUIT
V
IN
3
UTC LM317
1
V
ADJ
2
D1
1N4001
50k
V
OUT
V
IN
3
UTC LM317
1
2
R1
R2
I
OUT
Vo
UT
240
I
ADJ
1.25V
V
REF
)+I
ADJ
=
R1
R1
R2
10 F
I
O(MAX)
=(
I
O(MIN)
=(
V
REF
1.25V
)+I
ADJ
=
R1+R2
R1+R2
5mA<I
OUT
<100mA
Fig.3 Soft Start Application
Fig.4 Constant Current Application
UNISONIC TECHNOLOGIES CO., LTD
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QW-R101-009,K
LM317
TYPICAL CHARACTERISTICS
Load Regulation vs. temperature
0.2
LINEAR INTEGRATED CIRCUIT
Adjustment Current vs. Temperature
60
Output Voltage Deviation,
∆V
OUT
(%)
Adjustment Current, I
ADJ
(μA)
125
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
0
25
50
75
100
V
IN
=15V
V
OUT
=10V
55
50
45
40
35
-50
-25
0
25
50
75
100
125
Temperature
Temperature
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 5
QW-R101-009,K
嵌入式系统
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