STMicroelectronics LM117K 1.2 v to 37 v adjustable voltage regulator Datasheet

LM117/LM217/LM317
1.2 V to 37 V adjustable voltage regulators
Features
■
Output voltage range: 1.2 to 37 V
■
Output current in excess of 1.5 A
■
0.1% Line and load regulation
■
Floating operation for high voltages
■
Complete series of protections: current limiting,
thermal shutdown and SOA control
TO-220
TO-220FP
Description
The LM117/LM217/LM317 are monolithic
integrated circuit in TO-220, TO-220FP, TO-3 and
D2PAK packages intended for use as positive
adjustable voltage regulators.
They are designed to supply more than 1.5 A of
load current with an output voltage adjustable
over a 1.2 to 37 V range.
D2PAK
TO-3
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.
Table 1.
Device summary
Order codes
TO-220
D2PAK (tape and reel)
TO-220FP
TO-3
LM117K
LM217T
LM217D2T-TR
LM317T
LM317D2T-TR
February 2008
LM217K
LM317P
Rev 14
LM317K
1/25
www.st.com
25
Contents
LM117/LM217/LM317
Contents
1
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2/25
LM117/LM217/LM317
1
Pin configuration
Figure 1.
Pin connections (top view)
TO-220
D2PAK (Any Type)
Pin configuration
TO-220FP
TO-3
3/25
Maximum ratings
LM117/LM217/LM317
2
Maximum ratings
Table 2.
Absolute maximum ratings
Symbol
VI - VO
IO
TOP
PD
TSTG
Parameter
Value
Input-reference differential voltage
Unit
40
V
Output current
Operating junction temperature for:
Internally limited
LM117
-55 to 150
LM217
-25 to 150
LM317
0 to 125
Power dissipation
°C
Internally limited
Storage temperature
-65 to 150
°C
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
Table 3.
Thermal data
Symbol
Parameter
RthJC
Thermal resistance junction-case
RthJA
Thermal resistance junction-ambient
4/25
D2PAK
TO-220
TO-220FP
TO-3
Unit
3
3
5
4
°C/W
62.5
50
60
35
°C/W
LM117/LM217/LM317
3
Diagram
Figure 2.
Schematic diagram
Diagram
5/25
Electrical characteristics
LM117/LM217/LM317
4
Electrical characteristics
Table 4.
Electrical characteristics for LM117/LM217 (VI - VO = 5 V, IO = 500 mA, IMAX = 1.5 A and
PMAX = 20 W, TJ = -55 to 150°C for LM117, TJ = -25 to 150 °C for LM217, unless otherwise
specified)
Symbol
ΔVO
ΔVO
Parameter
Line regulation
Test conditions
TJ = 25°C
VI - VO = 3 to 40 V
VO ≤5 V
IO = 10 mA to IMAX
TJ = 25°C
VO ≥5 V,
IO = 10 mA to IMAX
TJ = 25°C
Adjustment pin current
ΔIADJ
Adjustment pin current
VI - VO = 2.5 to 40V
VREF
Reference voltage
(between pin 3 and pin 1)
VI - VO = 2.5 to 40V IO= 10 mA to IMAX
PD ≤PMAX
Minimum load current
IO(max)
Maximum load current
SVR
0.01
0.02
0.02
0.05
5
15
20
50
Unit
0.1
0.3
0.3
1
50
100
µA
0.2
5
µA
1.25
1.3
V
mV
%
IO = 10 mA to IMAX
1.2
Output noise voltage
(percentage of VO)
1
VI - VO = 40 V
3.5
VI - VO ≤15 V, PD < PMAX
1.5
mA
2.2
0.003
CADJ=0
CADJ=10µF
5
0.4
B = 10Hz to 100kHz, TJ = 25°C
Supply voltage rejection (1) TJ = 25°C, f = 120Hz
%
A
VI - VO = 40 V, PD < PMAX, TJ = 25°C
1. CADJ is connected between pin 1 and ground.
6/25
Max.
%/V
Output voltage
temperature stability
IO(min)
eN
Typ.
Load regulation
IADJ
ΔVO/VO
Min.
%
65
dB
66
80
LM117/LM217/LM317
Table 5.
Symbol
ΔVO
ΔVO
Electrical characteristics
Electrical characteristics for LM317 (VI - VO = 5 V, IO = 500 mA, IMAX = 1.5 A and
PMAX = 20 W, TJ = 0 to 125°C, unless otherwise specified)
Parameter
Line regulation
Test conditions
VI - VO = 3 to 40 V
TJ = 25°C
VO ≤5 V
IO = 10 mA to IMAX
TJ = 25°C
VO ≥5 V,
IO = 10 mA to IMAX
TJ = 25°C
Adjustment pin current
ΔIADJ
Adjustment pin current
VI - VO = 2.5 to 40V,
IO = 10 mA to 500mA
VREF
Reference voltage
(between pin 3 and pin 1)
VI - VO = 2.5 to 40V IO = 10 mA to 500mA
PD ≤PMAX
Minimum load current
IO(max)
Maximum load current
SVR
Max.
Unit
0.01
0.04
0.02
0.07
5
25
20
70
0.1
0.5
0.3
1.5
50
100
µA
0.2
5
µA
1.25
1.3
V
%/V
mV
%
1.2
Output voltage
temperature stability
IO(min)
eN
Typ.
Load regulation
IADJ
ΔVO/VO
Min.
Output noise voltage
(percentage of VO)
1
VI - VO = 40 V
3.5
VI - VO ≤15 V, PD < PMAX
1.5
mA
2.2
0.4
B = 10Hz to 100kHz, TJ = 25°C
0.003
CADJ=0
CADJ=10µF
10
A
VI - VO = 40 V, PD < PMAX, TJ = 25°C
Supply voltage rejection (1) TJ = 25°C, f = 120Hz
%
%
65
dB
66
80
1. CADJ is connected between pin 1 and ground.
7/25
Typical characteristics
LM117/LM217/LM317
5
Typical characteristics
Figure 3.
Output current vs input-output
differential voltage
Figure 5.
Reference voltage vs junction
Figure 6.
Basic adjustable regulator
8/25
Figure 4.
Dropout voltage vs junction
temperature
LM117/LM217/LM317
6
Application information
Application information
The LM117/217/317 provides an internal reference voltage of 1.25 V between the output
and adjustments terminals. This is used to set a constant current flow across an external
resistor divider (see Figure 3), giving an output voltage VO of:
VO = VREF (1 + R2/R1) + IADJ R2
The device was designed to minimize the term IADJ (100 µA 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-tooutput 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 R1 (see Figure 3) 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. Performance may be improved with added
capacitance as follow:
An input bypass capacitor of 0.1 µF
An adjustment terminal to ground 10 µF capacitor to improve the ripple rejection of about 15
dB (CADJ).
An 1 µF tantalum (or 25 µF Aluminium electrolytic) capacitor on the output to improve
transient response. In additional to external capacitors, it is good practice to add protection
diodes, as shown in Figure 4 D1 protect the device against input short circuit, while D2
protect against output short circuit for capacitance discharging.
Figure 7.
Voltage regulator with protection diodes
Note:
D1 protect the device against input short circuit, while D2 protects against output short
circuit for capacitors discharging.
9/25
Application information
LM117/LM217/LM317
Figure 8.
Slow turn-on 15 V regulator
Figure 9.
Current regulator
IO = (Vref/R1) + IADJ = 1.25V/R1
Figure 10. 5 V electronic shut-down regulator
10/25
LM117/LM217/LM317
Application information
Figure 11. Digitally selected outputs
(R2 sets maximum VO)
Figure 12. Battery charger (12 V)
* RS sets output impedance of charger ZO = RS (1 + R2/R1). Use of RS allows low charging rates whit fully
charged battery.
11/25
Application information
Figure 13. Current limited 6 V Charger
* R3 sets peak current (0.6 A for 1 0).
** C1 recommended to filter out input transients.
12/25
LM117/LM217/LM317
LM117/LM217/LM317
7
Package mechanical data
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
13/25
Package mechanical data
LM117/LM217/LM317
TO-3 mechanical data
mm.
Dim.
Min.
A
inch.
Typ.
Max.
Min.
Typ.
11.85
B
0.96
Max.
0.466
1.05
1.10
0.037
0.041
0.043
C
1.70
0.066
D
8.7
0.342
E
20.0
0.787
G
10.9
0.429
N
16.9
0.665
P
26.2
R
3.88
1.031
4.09
U
0.152
39.5
V
1.555
30.10
1.185
A
P
D
C
O
N
B
V
E
G
U
0.161
R
P003C/C
14/25
LM117/LM217/LM317
Package mechanical data
Figure 14. Drawing dimension TO-220 (type SMIC-subcon.)
0015988/F
15/25
Package mechanical data
LM117/LM217/LM317
Figure 15. Drawing dimension TO-220 (type STD-ST)
0015988/A
16/25
LM117/LM217/LM317
Table 6.
Package mechanical data
TO-220 mechanical data
Dim.
Min.
Type STD-ST
Type SMIC-Subcon.
mm.
mm.
Typ.
Max.
Min.
Typ.
Max.
A
4.40
4.60
4.47
4.57
4.67
A1
0.61
0.88
0.80
0.81
0.86
b1
1.14
1.70
1.15
c
0.49
0.70
0.56
c1
D
1.44
0.38
15.25
D1
15.75
15.07
15.24
15.45
1.27
E
10.00
10.40
10
10.15
10.30
e
2.40
2.70
2.29
2.54
2.79
e1
4.95
5.15
4.83
5.08
5.33
F
1.23
1.32
1.27
H1
6.20
6.60
6.24
J1
2.40
2.72
2.04
2.67
2.92
L
13.00
14.00
13.35
13.50
13.65
L1
3.50
3.93
L20
16.40
L30
28.90
16.25
16.40
16.55
28.74
∅P
3.75
3.85
Q
2.65
2.95
Note:
3.90
3.83
2.72
2.74
2.80
In spite of some difference in tolerances, the packages are compatible.
17/25
Package mechanical data
LM117/LM217/LM317
TO-220FP mechanical data
Dim.
mm.
Min.
A
4.40
Typ
inch.
Max.
Min.
Typ.
Max.
4.60
0.173
0.181
B
2.5
2.7
0.098
0.106
D
2.5
2.75
0.098
0.108
E
0.45
0.70
0.017
0.027
F
0.75
1
0.030
0.039
F1
1.15
1.50
0.045
0.059
F2
1.15
1.50
0.045
0.059
G
4.95
5.2
0.194
0.204
G1
2.4
2.7
0.094
0.106
H
10.0
10.40
0.393
0.409
L2
L3
16
0.630
28.6
30.6
1.126
1.204
L4
9.8
10.6
0.385
0.417
L5
2.9
3.6
0.114
0.142
L6
15.9
16.4
0.626
0.645
L7
9
9.3
0.354
0.366
DIA.
3
3.2
0.118
0.126
7012510A-H
18/25
LM117/LM217/LM317
Package mechanical data
Figure 16. Drawing dimension D2PAK (type STD-ST)
0079457/L
19/25
Package mechanical data
LM117/LM217/LM317
Figure 17. Drawing dimension D2PAK (type WOOSEOK-SUBCON.)
0079457/L
20/25
LM117/LM217/LM317
Table 7.
D2PAK mechanical data
DIM.
MIN.
TYPE STD-ST
TYPE WOOSEOK-SUBCON.
mm.
mm.
TYP.
MAX.
MIN.
TYP.
MAX.
A
4.40
4.60
4.30
4.70
A1
0.03
0.23
0
0.20
b
0.70
0.93
0.70
0.90
b2
1.14
1.70
1.17
1.37
c
0.45
0.60
0.45
0.50
0.60
c2
1.23
1.36
1.25
1.30
1.40
D
8.95
9.35
9
9.20
9.40
D1
7.50
E
10
E1
8.50
e
7.50
10.40
9.80
10.20
7.50
2.54
2.54
e1
4.88
5.28
H
15
15.85
15
J1
2.49
2.69
2.20
2.60
L
2.29
2.79
1.79
2.79
L1
1.27
1.40
1
1.40
L2
1.30
1.75
1.20
1.60
R
V2
Note:
Package mechanical data
5.08
0.4
0°
15.30
15.60
0.30
8°
0°
3°
The D2PAK package coming from the subcontractor Wooseok is fully compatible with the
ST's package suggested footprint.
21/25
Package mechanical data
LM117/LM217/LM317
Figure 18. D2PAK footprint recommended data
Table 8.
Footprint data
Values
22/25
mm.
inch.
A
12.20
0.480
B
9.75
0.384
C
16.90
0.665
D
3.50
0.138
E
1.60
0.063
F
2.54
0.100
G
5.08
0.200
LM117/LM217/LM317
Package mechanical data
Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data
mm.
inch.
Dim.
Min.
Typ.
A
Max.
Min.
Typ.
180
13.0
7.086
C
12.8
D
20.2
0.795
N
60
2.362
T
13.2
Max.
0.504
0.512
14.4
0.519
0.567
Ao
10.50
10.6
10.70
0.413
0.417
0.421
Bo
15.70
15.80
15.90
0.618
0.622
0.626
Ko
4.80
4.90
5.00
0.189
0.193
0.197
Po
3.9
4.0
4.1
0.153
0.157
0.161
P
11.9
12.0
12.1
0.468
0.472
0.476
23/25
Revision history
LM117/LM217/LM317
8
Revision history
Table 9.
Document revision history
Date
Revision
01-Sep-2004
10
Mistake VREF ==> VO, tables 1, 4 and 5.
19-Jan-2007
11
D2PAK mechanical data has been updated, add footprint data and the
document has been reformatted.
13-Jun-2007
12
Change values ΔIADJ and VREF test condition of IO = 10 mA to IMAX ==>
IO = 10 mA to 500mA on Table 5.
23-Nov-2007
13
Added Table 1.
06-Feb-2008
14
Added: TO-220 mechanical data Figure 14 on page 15, Figure 15 on page 16
and Table 6 on page 17.
24/25
Changes
LM117/LM217/LM317
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