LM317LD [STMICROELECTRONICS]
LOW CURRENT 1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR; 低电流1.2〜 37V可调稳压器
| 型号： | LM317LD |
| 厂家： | 
ST |
| 描述： | LOW CURRENT 1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR |
| 文件： | 总10页 (文件大小：252K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM217L
LM317L
LOW CURRENT
1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR
■
■
■
■
■
■
■
OUTPUT VOLTAGE RANGE: 1.2 TO 37V
OUTPUT CURRENT IN EXCESS OF 100 mA
LINE REGULATION TYP. 0.01%
LOAD REGULATION TYP. 0.1%
THERMAL OVERLOAD PROTECTION
SHORT CIRCUIT PROTECTION
OUTPUT TRANSISTOR SAFE AREA
COMPENSATION
■
FLOATING OPERATION FOR HIGH
VOLTAGE APPLICATIONS
DESCRIPTION
TO-92
SO-8
The LM217L/LM317L are monolithic integrated
circuit in SO-8 and TO-92 packages intended for
use as positive adjustable voltage regulators.
They are designed to supply until 100 mA of load
current with an output voltage adjustable over a
1.2 to 37V range.
exceptionally easy to use and eliminating the
stocking of many fixed regulators
The nominal output voltage is selected by means
of only a resistive divider, making the device
SCHEMATIC DIAGRAM
February 2003
1/10
LM217L/LM317L
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter²
Value
Unit
V
V
Input-Output Differential Voltage
40
V
I -
O
P
Power Dissipation
Internally Limited
-40 to 125
d
Operating Junction Temperature for LM217L
Range
T
°C
°C
opr
for LM317L
0 to 125
T
Storage Temperature Range
-55 to 150
stg
CONNECTION DIAGRAM (top view)
PIN 1 = ADJUST
PIN 2 = IN
PIN 3 = OUT
BOTTOM VIEW
SO-8
TO-92
ORDERING CODES
TYPE
SO-8
TO-92
LM217L
LM317L
LM217LD
LM317LD
LM217LZ
LM317LZ
TEST CIRCUIT
2/10
LM217L/LM317L
ELECTRICAL CHARACTERISTICS OF LM217L (refer to the test circuits, T = - 40 to 125°C,
J
V - V = 5 V, I = 40 mA, unless otherwise specified).
I
O
O
Symbol
Parameter
Test Conditions
V - V = 3 to 40 V T = 25°C
Min.
Typ.
Max.
Unit
∆V
Line Regulation
0.01
0.02
%/V
O
I
O
J
I < 20 mA
L
0.02
5
0.05
15
∆V
Load Regulation
V
≤ 5 V
T = 25°C
mV
%
O
O
J
I
= 5 to 100 mA
O
20
50
V
≥ 5 V
T = 25°C
0.1
0.3
O
J
I
= 5 to 100 mA
O
0.3
50
1
I
Adjustment Pin Current
Adjustment Pin Current
100
µA
µA
ADJ
∆I
V - V = 3 to 40 V
I
I
= 5 to 100 mA
= 10 to 500 mA
0.2
1.25
0.7
5
ADJ
I
O
O
P < 625 mW
d
V
Reference Voltage
V - V = 3 to 40 V
1.2
1.3
V
REF
I
O
O
P < 625 mW
d
∆V /V Output Voltage
%
O
O
Temperature Stability
I
Minimum Load Current
V - V = 40 V
3.5
200
50
5
mA
mA
O(min)
I
O
I
Maximum Output Current
Output Noise Voltage
V - V = 3 to 13 V
100
66
O(max)
I
O
V - V = 40 V
I
O
eN
B = 10 Hz to 10 KHzT = 25°C
0.003
65
%
J
SVR Supply Voltage Rejection (*) T = 25°C
C
C
= 0
dB
J
ADJ
ADJ
f = 120 Hz
= 10 µF
80
(*) CADJ is connected between Adjust pin and Ground.
ELECTRICAL CHARACTERISTICS OF LM317L (refer to the test circuits, T = 0 to 125°C,
J
V - V = 5 V, I = 40 mA, unless otherwise specified).
I
O
O
Symbol
Parameter
Test Conditions
V - V = 3 to 40 V T = 25°C
Min.
Typ.
Max.
Unit
∆V
Line Regulation
0.01
0.04
%/V
O
I
O
J
I < 20 mA
L
0.02
5
0.07
25
∆V
Load Regulation
V
≤ 5 V
T = 25°C
mV
%
O
O
J
I
= 5 to 100 mA
O
20
70
V
≥ 5 V
T = 25°C
0.1
0.5
O
J
I
= 5 to 100 mA
O
0.3
50
1.5
100
5
I
Adjustment Pin Current
Adjustment Pin Current
µA
µA
ADJ
∆I
V - V = 3 to 40 V
P < 625 mW
I
I
= 5 to 100 mA
= 5 to 100 mA
0.2
ADJ
I
O
O
d
V
Reference Voltage
V - V = 3 to 40 V
P < 625 mW
1.2
1.25
0.7
1.3
V
REF
I
O
O
d
∆V /V Output Voltage
%
O
O
Temperature Stability
I
Minimum Load Current
V - V = 40 V
3.5
200
50
5
mA
mA
O(min)
I
O
I
Maximum Output Current
Output Noise Voltage
V - V = 3 to 13 V
100
66
O(max)
I
O
V - V = 40 V
I
O
eN
B = 10 Hz to 10 KHzT = 25°C
0.003
65
%
J
SVR Supply Voltage Rejection (*) T = 25°C
C
C
= 0
dB
J
ADJ
ADJ
f = 120 Hz
= 10 µF
80
(*) CADJ is connected between Adjust pin and Ground.
3/10
LM217L/LM317L
Figure 1 : Current Limit
Figure 2 : Minimum Operating Current
APPLICATION INFORMATION
The LM317L provides an internal reference voltage of 1.25V between the output and adjustments
terminals. This is used to set a constant current flow across an external resistor divider (see fig. 4), giving
an output voltage V of:
O
V
= V
(1 + R /R ) + I
R
ADJ 2
O
REF
2
1
The device was designed to minimize the term I
(100µA max) and to maintain it very constant with line
ADJ
and load changes. Usually, the error term I
× R can be neglected. To obtain the previous requirement,
ADJ
2
all the regulator quiescent current is returned to the output terminal, imposing a minimum load current
condition. If the load is insufficient, the output voltage will rise.
Since the LM317L is a floating regulator and "sees" only the input-to-output differential voltage, supplies
of very high voltage with respect to ground can be regulated as long as the maximum input-to-output
differential is not exceeded. Furthermore, programmable regulator are easily obtainable and, by
connecting a fixed resistor between the adjustment and output, the device can be used as a precision
current regulator. In order to optimize the load regulation, the current set resistor R (see fig. 4) should be
1
tied as close as possible to the regulator, while the ground terminal of R should be near the ground of the
2
load to provide remote ground sensing.
Figure 3 : Basic Adjustable Regulator
4/10
LM217L/LM317L
Figure 4 : Voltage Regulator with Protection Diodes
Figure 5 : Slow Turn-on 15V Regulator
Figure 6 : Current Regulator
V
R
1.25V
R
1
ref
I
=
+ I
≈
O
ADJ
1
5/10
LM217L/LM317L
Figure 7 : 5V Electronic Shut-down Regulator
Figure 8 : Digitally Selected Outputs
(R = sets maximum V )
2
O
6/10
LM217L/LM317L
SO-8 MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
TYP
MAX.
MIN.
MAX.
A
A1
A2
B
1.35
1.75
0.053
0.069
0.10
1.10
0.33
0.19
4.80
3.80
0.25
1.65
0.51
0.25
5.00
4.00
0.04
0.010
0.065
0.020
0.010
0.197
0.157
0.043
0.013
0.007
0.189
0.150
C
D
E
e
1.27
0.050
H
5.80
0.25
0.40
6.20
0.50
1.27
0.228
0.010
0.016
0.244
0.020
0.050
h
L
k
˚ (max.)
8
ddd
0.1
0.04
0016023/C
7/10
LM217L/LM317L
TO-92 MECHANICA DATA
mm.
mils
TYP.
DIM.
MIN.
TYP
MAX.
MIN.
MAX.
A
b
4.32
4.95
170.1
194.9
0.36
4.45
3.30
2.41
1.14
12.7
2.16
0.92
0.41
0.51
4.95
3.94
2.67
1.40
15.49
2.41
1.52
0.56
14.2
175.2
129.9
94.9
20.1
194.9
155.1
105.1
55.1
D
E
e
e1
L
44.9
500.0
85.0
609.8
94.9
R
S1
W
36.2
59.8
16.1
22.0
0102782/C
8/10
LM217L/LM317L
Tape & Reel SO-8 MECHANICAL DATA
mm.
TYP
inch
TYP.
DIM.
MIN.
MAX.
330
MIN.
MAX.
12.992
0.519
A
C
12.8
20.2
60
13.2
0.504
0.795
2.362
D
N
T
22.4
8.5
5.9
2.3
4.1
8.1
0.882
0.335
0.232
0.090
0.161
0.319
Ao
Bo
Ko
Po
P
8.1
5.5
2.1
3.9
7.9
0.319
0.216
0.082
0.153
0.311
9/10
LM217L/LM317L
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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