ETC LM217P

LM117/217
LM317
1.2V TO 37V ADJUSTABLE VOLTAGE REGULATOR
..
..
.
OUTPUT VOLTAGE RANGE : 1.2 TO 37V
OUTPUT CURRENT IN EXCESS OF 1.5A
(0.5A for TO-39)
0.1% LINE AND LOAD REGULATION
FLOATING OPERATION FOR HIGH VOLTAGES
COMPLETE SERIES OF PROTECTIONS :
CURRENT LIMITING, THERMAL SHUTDOWN
AND SOA CONTROL
TO-3
DESCRIPTION
The LM117/LM217/LM317 are monolithic integrated circuit in TO-220 and TO-3 packages intended for use as positive adjustable voltage regulators.
They are designed to supply more than 1.5A of load
current with an output voltage adjustable over a 1.2
to 37V range.
TO-220
TO-39
The nominal output voltage is selected by means of
only a resistive divider, making the device exceptionally easy to use and eliminating the stocking of
many fixed regulators.
ABSOLUTE MAXIMUM RATING
Symbol
Vi-o
IO
Parameter
Value
Unit
40
V
Input-output Differential Voltage
Output Current
Top
Operating Junction Temperature for:
P tot
Power Dissipation
Intenrally Limited
LM117
LM217
LM317
o
-55 to 150
-25 to 150
0 to 125
C
C
o
C
o
Internally Limited
THERMAL DATA
Rthj-case Thermal Resistance Junction-case
Rthj-amb Thermal Resistance Junction-ambient
March 1993
Max
Max
TO-3
TO-220
ISOWATT220
TO-39
4
35
3
50
4
60
15
160
o
o
C/W
C/W
1/10
LM117/LM217/LM317
PIN CONNECTION AND ORDERING NUMBER
TO-220
TO-3
TO-3
pin 1 = INPUT
pin2 = ADJ
pin3 = OUTPUT
Type
TO-3
LM117
LM117K
LM217
LM217K
LM217T
LM217P
LM217H
LM317
LM317K
LM317T
LM317P
LM317H
SCHEMATIC DIAGRAM
2/10
TO-220
ISOWATT220
TO-39
LM117H
LM117/LM217/LM317
Basic adjustable regulator.
ELECTRICAL CHARACTERISTICS (Vi - Vo = 5 V, I o = 500 mA for TO-3 and TO-220,
I o = 100 mA for TO-39, I MAX and P MA X according note 2, unless otherwise specified)
Symbol
Parameter
Test Conditions
LM117/LM217
Min.
Max.
Typ.
Max.
0.01
0.02
0.01
0.04
%/V
0.02
0.05
0.02
0.07
%/V
5
15
5
25
mV
20
70
mV
0.1
0.5
%
0.3
1.5
%
100
50
100
µA
0.2
5
0.2
5
µA
1.25
1.3
1.25
1.3
V
Line Regulation
V i - Vo = 3 to 40 V
Tj = 25 oC
∆Vo
Load Regulation
V o ≤ 5V
Io = 10 mA to IMAX
Tj = 25 oC
20
50
V o ≥ 5V
Io = 10 mA to IMAX
Tj = 25 oC
0.1
0.3
0.3
1
50
Adjustment Pin
Current
∆IADJ
Adjustment Pin
Current
V i - Vo = 2.5 to 40 V
Io = 10 mA to IMAX
VREF
Reference Voltage
(between pin 3 and
pin 1)
V i - Vo = 2.5 to 40 V
Io = 10 mA to IMAX
P D ≤ PMAX
∆Vo
Vo
Output Voltage
Temperature Stability
Io(min)
Minimum Load
Current
V i - Vo = 40 V
Io(max)
Maximum Load
Current
V i - Vo ≤ 15 V
P D < PMAX
SVR
3.5
TO-3
TO-220
1.5
TO-39
0.5
Tj = 25 oC
f = 120 Hz
1
5
3.5
2.2
1.5
0.8
0.5
%
10
2.2
mA
A
0.8
A
TO-3
TO-220
0.4
0.4
A
TO-39
0.07
0.07
A
0.003
0.003
%
65
65
dB
80
dB
Output Noise Voltage B = 10Hz to 10KHz
(percentance of VO)
Tj = 25 oC
Supply Voltage
Rejection (*)
1.2
1
V i - Vo = 40 V
P D < PMAX
Tj = 25 oC
eN
1.2
Min.
Unit
Typ.
∆Vo
IADJ
LM317
CADJ=0
CADJ=10µF
66
80
66
(*) CADJ is connected between pin 1 and ground.
Note:
(1) Unless otherwise specified the above specs, apply over the following conditions : LM 117 Tj = – 55 to 150°C;
LM 217 Tj = – 25 to 150°C ; LM 317 Tj = 0 to 125°C.
(2) IMAX: 1.5 A for TO-3 and TO-220; 0.5 A for TO-39
PMAX: 20 W for TO-3 and TO-220; 2 W for TO-39
3/10
LM117/LM217/LM317
Figure 1 : Output Current vs. Input-output
Differential Voltage.
Figure 2 : Dropout Voltage vs. Junction
Temperature.
Figure 3 : Reference Voltage vs. Junction
Figure 4 : Basic Adjustable Regulator.
APPLICATION INFORMATION
The LM117/217/317 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 VO of:
VO = VREF (1 +
R2
) + IADJ R2
R1
The device was designed to minimize the term IADJ
(100µA max) and to maintain it very constant with
line and load changes. Usually, the error term
IADJ ⋅ R2 can be neglected. To obtain the previous
requirement, 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 LM117/217317 is a floating regulator and
”sees” only the input-to-output differential voltage,
4/10
supplies of very high voltage with respect to ground
can be regulated as long as the maximum input-tooutput 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 optimise the load regulation, the current
set resistor R1 (see fig. 4) should be tied as close
as possible to the regulator, while the ground terminal of R2 should be near the ground of the load to
provide remote ground sensing.
No external capacitors are required, but performance may be improved with added capacitance as
follow:
An input bypass capacitor of 0.1 µF
LM117/LM217/LM317
An adjustment terminal to ground 10 mF capacitor
to improve the ripple rejection of about 15 dB (CADJ).
An 1mF tantalium capacitor on the output to improve
transient response.
In additional to external capacitors, it is good prac-
tice to add protection diodes, as shown in fig.5.
D1 protect the device against input short circuit,
while D2 protect against output short circuit for capacitance discharging.
Figure 5 : Voltage Regulator with Protection Diodes.
D1 protect the device against input short circuit, while D2 protects against output short circuit for capacitors discharging
Figure 6 : Slow Turn-on 15V Regulator.
Figure 7 : Current Regulator.
Io =
Vref
1.25V
+ IADJ ≈
R1
R1
5/10
LM117/LM217/LM317
Figure 8 : 5V Electronic Shut-down Regulator.
Figure 9 : Digitally Selected Outputs.
(R2 sets maximum Vo )
Figure 10 : Battery Charger (12V).
* RS sets output impedance of charger
R2
Zo = RS (1 + )
R1
Use of RS allows low charging rates with fully charged battery.
6/10
Figure 11 : Current Limited 6V Charger.
* R3 sets peak current (0.6A for 1Ω).
** C1 recommended to filter out input transients.
LM117/LM217/LM317
TO-3 MECHANICAL DATA
mm
DIM.
MIN.
inch
TYP.
MAX.
MIN.
TYP.
MAX.
A
11.00
13.10
0.433
0.516
B
0.97
1.15
0.038
0.045
C
1.50
1.65
0.059
0.065
D
8.32
8.92
0.327
0.351
E
19.00
20.00
0.748
0.787
G
10.70
11.10
0.421
0.437
N
16.50
17.20
0.649
0.677
P
25.00
26.00
0.984
1.023
R
4.00
4.09
0.157
0.161
U
38.50
39.30
1.515
1.547
V
30.00
30.30
1.187
1.193
A
P
C
O
N
B
V
E
G
U
D
R
P003F
7/10
LM117/LM217/LM317
TO-220 MECHANICAL DATA
mm
DIM.
MIN.
inch
MAX.
MIN.
A
4.40
TYP.
4.60
0.173
0.181
C
1.23
1.32
0.048
0.051
D
2.40
2.72
0.094
D1
TYP.
MAX.
0.107
1.27
0.050
E
0.49
0.70
0.019
0.027
F
0.61
0.88
0.024
0.034
F1
1.14
1.70
0.044
0.067
F2
1.14
1.70
0.044
0.067
G
4.95
5.15
0.194
0.203
G1
2.4
2.7
0.094
0.106
H2
10.0
10.40
0.393
L2
0.409
16.4
0.645
13.0
14.0
0.511
0.551
L5
2.65
2.95
0.104
0.116
L6
15.2
15.9
0.598
0.625
L7
6.2
6.6
0.244
0.260
L9
3.5
4.2
0.137
0.165
DIA.
3.75
3.85
0.147
0.151
D1
C
D
A
E
L4
H2
G
G1
F1
L2
F2
F
Dia.
L5
L9
L7
L6
L4
P011C
8/10
LM117/LM217/LM317
TO39 MECHANICAL DATA
mm
inch
DIM.
MIN.
A
TYP.
MAX.
MIN.
12.7
TYP.
MAX.
0.500
B
0.49
0.019
D
6.6
0.260
E
8.5
0.334
F
9.4
0.370
G
5.08
0.200
H
1.2
0.047
I
0.9
0.035
45o (typ.)
L
D
A
G
I
E
F
H
B
L
P008B
9/10
LM117/LM217/LM317
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
 1994 SGS-THOMSON Microelectronics - All Rights Reserved
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