LM317AL-TA3-T [UTC]
MEDIUM CURRENT 1.2V TO 37V ADJUSTABLE VOLTAGE REGULATOR; 中等电流1.2V至37V可调稳压
| 型号： | LM317AL-TA3-T |
| 厂家： | 
Unisonic Technologies |
| 描述： | MEDIUM CURRENT 1.2V TO 37V ADJUSTABLE VOLTAGE REGULATOR |
| 文件： | 总5页 (文件大小：256K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
LM317A
LINEAR INTEGRATED CIRCUIT
MEDIUM CURRENT 1.2V TO
37V ADJUSTABLE VOLTAGE
REGULATOR
DESCRIPTION
The UTC LM317A is an adjustable 3-terminal positive voltage
regulator, designed to supply 1.5A of output current with voltage
adjustable from 1.2V ~ 37V.
FEATURES
* Output voltage adjustable from 1.2V ~ 37V
* Output current in excess of 1.5A
* Internal thermal overload protection
* Internal short circuit current limiting
* Output transistor safe area compensation
ORDERING INFORMATION
Ordering Number
Pin Assignment
Packing
Package
Lead Free
Halogen Free
LM317AG-AA3-R
LM317AG-TA3-T
LM317AG-TN3-R
LM317AG-TQ2-R
LM317AG-TQ2-T
1
2
3
I
LM317AL-AA3-R
LM317AL-TA3-T
LM317AL-TN3-R
LM317AL-TQ2-R
LM317AL-TQ2-T
SOT-223
TO-220
TO-252
TO-263
TO-263
ADJ
ADJ
ADJ
ADJ
ADJ
O
O
O
O
O
Tape Reel
Tube
I
I
Tape Reel
Tape Reel
Tube
I
I
Note: Pin Assignment: I: VIN O: VOUT
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LM317A
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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LM317A
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VIN-VOUT
PD
RATINGS
40
UNIT
V
Input-Output Voltage Differential
Power Dissipation
Internally limited
+125
Junction Temperature
Operating Temperature
Storage Temperature
TJ
°C
°C
°C
TOPR
0 ~ +125
-65 ~ +150
TSTG
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
UNIT
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
SOT-223
TO-220
TO-252
TO-263
SOT-223
TO-220
TO-252
TO-263
140
50
Junction to Ambient
Junction to Case
θJA
103
62.5
23.5
3
θJC
12
3
ELECTRICAL CHARACTERISTICS
(VIN-VOUT=5V, IOUT=0.5A, PMAX=20W, Ta=25°C, unless otherwise specified.)
PARAMETER SYMBOL TEST CONDITIONS
Line Regulation
MIN TYP MAX UNIT
ΔVOUT/VOUT 3V≤VIN-VOUT≤40V, IOUT=100mA
VOUT≤5V
0.01 0.04
%/V
mV
%
5
25
0.5
100
Load Regulation
ΔVOUT
IADJ
10mA≤IOUT≤1.5A
VOUT≥5V
0.1
50
Adjustable Pin Current
Adjustable Pin Current Change
μA
3V≤VIN-VOUT≤40V,
10mA≤IOUT≤500mA
3V≤VIN-VOUT≤40V,
ΔIADJ
0.2
5
μA
Reference Voltage
VREF
1.20 1.25 1.30
V
10mA≤IOUT≤1.5A, PD＜PMAX
Temperature Stability
TMIN≤TJ≤TMAX
VIN-VOUT=40V
0.7
4.5
%/VOUT
mA
Minimum Load Current for Regulation
IL(MIN)
IO(MAX)
eN
VIN-VOUT=40V, PD≤PMAX
VIN-VOUT=15V, PD＜PMAX
0.3
1.5
0.4
2.2
A
Maximum Output Current
RMS Noise vs. %of VOUT
Ripple Rejection
A
10HZ≤f≤10KHZ
0.003
65
%/VOUT
dB
CADJ=0
RR
VOUT=10V,f=120HZ
CADJ=10μF
66
80
dB
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LM317A
LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUITS
D1 1N4002
VIN
VOUT
3
2
UTC LM317A
1
R1
IADJ
VIN
VOUT
UTC
LM317A
3
2
C1
0.1μF
Co
1μF
1μF
R2
1
120Ω
1kΩ
720Ω
VOUT=1.25V×(1+R2/R1)+IADJ×R2
TTL Level
signal
C1 is required when regulator is located an
appreciated distance from power supply. Co is
needed to improve transient response.
Fig.1 Programmable voltage regulator
Fig.2 Regulator with On-off control
IO(MAX) = ( VREF )+IADJ =
1.25V
R1
R1
VREF
1.25V
IO(MIN) = (
)+IADJ =
R1+R2
R1+R2
5mA < IOUT <100mA
Fig.3 Soft Start Application
Fig.4 Constant Current Application
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LM317A
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
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.
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