LM317MBDT-1T4 [MOTOROLA]
Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, PSIP3, PLASTIC, DPAK-3;
| 型号： | LM317MBDT-1T4 |
| 厂家： | 
MOTOROLA |
| 描述： | Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, PSIP3, PLASTIC, DPAK-3 |
| 文件： | 总10页 (文件大小：189K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Order this document by LM317M/D
MEDIUM CURRENT
THREE–TERMINAL
ADJUSTABLE POSITIVE
VOLTAGE REGULATOR
The LM317M is an adjustable three–terminal positive voltage regulator
capable of supplying in excess of 500 mA over an output voltage range of
1.2 V to 37 V. This voltage regulator is exceptionally easy to use and requires
only two external resistors to set the output voltage. Further, it employs
internal current limiting, thermal shutdown and safe area compensation,
making it essentially blow–out proof.
The LM317M serves a wide variety of applications including local,
on–card regulation. This device also makes an especially simple adjustable
switching regulator, a programmable output regulator, or by connecting a
fixed resistor between the adjustment and output, the LM317M can be used
as a precision current regulator.
SEMICONDUCTOR
TECHNICAL DATA
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2
(All 3 Packages)
• Output Current in Excess of 500 mA
Pin 1. Adjust
1
2. V
• Output Adjustable between 1.2 V and 37 V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe–Area Compensation
• Floating Operation for High Voltage Applications
• Eliminates Stocking Many Fixed Voltages
out
2
3
3. V
in
DT–1 SUFFIX
PLASTIC PACKAGE
CASE 369
1
(DPAK)
2
3
DT SUFFIX
PLASTIC PACKAGE
CASE 369A
1
(DPAK)
3
Simplified Application
Heatsink Surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
V
V
out
in
V
V
LM317M
in
out
ORDERING INFORMATION
Operating
R
240
1
Temperature Range
Device
Package
I
Adj
Adjust
**
*
+
Plastic
Power
LM317MT
LM317MAT
C
C
in
O
T = 0° to +125°C
J
0.1
µ
F
1.0µF
Plastic
Power
LM317MBT#
LM317MABT#
T = –40° to +125°C
J
R
2
LM317MDT
LM317MADT
LM317MDT–1
LM317MADT–1
T = 0° to 125°C
DPAK
DPAK
J
LM317MBDT
* = C is required if regulator is located an appreciable distance from power supply filter.
in
LM317MABDT
LM317MBDT–1
LM317MABDT–1
T = –40° to 125°C
J
** = C is not needed for stability, however, it does improve transient response.
O
R
R
2
1
V
1.25 V
1
I
R
out
Adj 2
# Automotive temperature range selections are
# available with special test conditions and additional
# tests. Contact your local Motorola sales office for
# information.
Since I
is controlled to less than 100
µA, the error associated with this
Adj
term is negligible in most applications.
Motorola, Inc. 1998
Rev4
LM317M, LM317MA
MAXIMUM RATINGS (T = 25°C, unless otherwise noted.)
A
Rating
Symbol
V –V
Value
Unit
Input–Output Voltage Differential
40
Vdc
I
O
Power Dissipation (Package Limitation) (Note 1)
Plastic Package, T Suffix
T
A
= 25°C
P
Internally Limited
D
Thermal Resistance, Junction–to–Air
Thermal Resistance, Junction–to–Case
θ
θ
70
5.0
°C/W
°C/W
JA
JC
Plastic Package, DT Suffix
= 25°C
T
A
P
θ
θ
Internally Limited
D
JA
JC
Thermal Resistance, Junction–to–Air
Thermal Resistance, Junction–to–Case
92
5.0
°C/W
°C/W
Operating Junction Temperature Range
Storage Temperature Range
T
–40 to +125
–65 to +150
°C
°C
J
T
stg
NOTE: 1. Figure 23 provides thermal resistance versus pc board pad size.
ELECTRICAL CHARACTERISTICS (V –V = 5.0 V; I = 0.1 A, T = T
to T [Note 1], unless otherwise noted.)
high
I
O
O
J
low
Characteristics
Figure
Symbol
Min
Typ
Max
Unit
Line Regulation (Note 2)
= 25°C, 3.0 V ≤ V –V ≤ 40 V
1
Reg
–
0.01
0.04
%/V
line
T
A
I
O
Load Regulation (Note 2)
= 25°C, 10 mA ≤ I ≤ 0.5 A
2
Reg
load
T
A
O
V
O
O
≤ 5.0 V
≥ 5.0 V
–
–
5.0
0.1
25
0.5
mV
V
% V
O
Adjustment Pin Current
3
I
–
–
50
100
5.0
µA
µA
Adj
Adjustment Pin Current Change
1,2
∆I
0.2
Adj
2.5 V ≤ V –V ≤ 40 V, 10 mA ≤ I ≤ 0.5 A, P ≤ P
I
O
L
D
max
Reference Voltage
3.0 V ≤ V –V ≤ 40 V, 10 mA ≤ I ≤ 0.5 A, P ≤ P
max
LM317M:
LM317MA:
3
1
2
V
1.200
1.225
1.250
1.250
1.300
1.275
V
ref
I
O
O
D
Line Regulation (Note 2)
3.0 V ≤ V –V ≤ 40 V
Reg
–
0.02
0.07
%/V
line
I
O
Load Regulation (Note 2)
10 mA ≤ I ≤ 0.5 A
Reg
load
O
V
O
V
O
≤ 5.0 V
≥ 5.0 V
–
–
20
0.3
70
1.5
mV
% V
O
Temperature Stability (T
≤ T ≤ T
)
3
3
T
–
–
0.7
3.5
–
% V
low
J
high
S
O
Minimum Load Current to Maintain Regulation
(V –V = 40 V)
I
10
mA
A
Lmin
I
O
Maximum Output Current
3
I
max
V –V ≤ 15 V, P ≤ P
0.5
0.15
0.9
0.25
–
–
I
I
O
O
D
D
max
max
V –V = 40 V, P ≤ P
, T = 25°C
A
RMS Noise, % of V
T = 25°C, 10 Hz ≤ f ≤ 10 kHz
A
–
4
N
–
0.003
–
% V
O
O
Ripple Rejection, V = 10 V, f = 120 Hz (Note 3)
RR
dB
O
Without C
–
66
65
80
–
–
Adj
C
= 10 µF
Adj
Long–Term Stability, T = T
T = 25°C for Endpoint Measurements
A
(Note 4)
3
S
–
0.3
1.0
%/1.0 k
Hrs.
J
high
NOTES: 1. T
low
to T
high
= 0° to +125°C for LM317M
T
to T
= –40° to +125°C for LM317MB
low
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account separately.
O
Pulse testing with low duty cycle is used.
3. C , when used, is connected between the adjustment pin and ground.
Adj
4. Since Long–Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability
from lot to lot.
2
MOTOROLA ANALOG IC DEVICE DATA
LM317M, LM317MA
Representative Schematic Diagram
V
in
300
300
300
3.0k
300
70
6.8V
6.8V
350
18k
8.67k
500
130
400
5.1k
200k
180 180
2.0k
6.0k
60
1.25
10
pF
6.3V
10
pF
V
out
2.4k
12.8k
50
Adjust
Figure 1. Line Regulation and ∆I
Adj
/Line Test Circuit
V
CC
V
– V
OL
OH
V
OL
Line Regulation (%/V) =
x 100
*
V
V
OH
IH
V
V
V
V
out
IL
in
OL
LM317M
Adjust
240
1%
R
R
L
1
+
C
0.1µF
C
1.0µF
I
in
O
Adj
R2
1%
* Pulse Testing Required:
1% Duty Cycle is suggested.
3
MOTOROLA ANALOG IC DEVICE DATA
LM317M, LM317MA
Figure 2. Load Regulation and ∆I
Adj
/Load Test Circuit
Load Regulation (mV) = V (min Load) –V (max Load)
O
O
V
(min Load) – V (max Load)
O
O
Load Regulation (% V ) =
X 100
O
V
(min Load)
O
V
(min Load)
O
VO (max Load)
V
V
V
out
in
in
LM317M
I
L
R
L
(max Load)
240
1%
Adjust
R
L
(min Load)
R
1
*
+
C
0.1µF
C
1.0µF
in
O
I
Adj
R
1%
2
* Pulse Testing Required:
1% Duty Cycle is suggested.
Figure 3. Standard Test Circuit
V
V
out
in
LM317M
I
L
Adjust
240
1%
R
V
R
L
V
1
ref
I
I
Adj
+
C
0.1µF
C
O
1µF
V
in
O
I
SET
R
1%
2
To Calculate R :
2
*Pulse Testing Required:
1% Duty Cycle is suggested.
V
= I
R
+ 1.250 V
= 5.25 mA
out SET
2
Assume I
SET
Figure 4. Ripple Rejection Test Circuit
24V
V
V
out
V
= 10 V
in
out
14V
f = 120 Hz
LM317M
D
*
1
240
1%
Adjust
R
R
L
1N4002
1
+
C
0.1µF
C
1.0µF
V
O
in
O
**
C
+
1.65K
1%
10µF
R
Adj
2
* D Discharges C
**C
Adj
if Output is Shorted to Ground.
provides an AC ground to the adjust pin.
1
Adj
4
MOTOROLA ANALOG IC DEVICE DATA
LM317M, LM317MA
Figure 5. Load Regulation
Figure 6. Ripple Rejection
90
80
0.4
0.2
V
= 45 V
= 5.0 V
in
V
out
= 5.0 mA to 40 mA
I
L
Without C
Adj
= 10 µF
0
–0.2
–0.4
70
V
= 10 V
= 5.0 V
in
V
out
= 5.0 mA to 100 mA
I
Without C
Adj
I
= 100 mA
L
L
–0.6
–0.8
60
50
f = 120 Hz
= 10 V
= 14 V to 24 V
out
–1.0
–50
–25
0
25
50
75
100 125
C)
150
–50
–25
0
25
50
75
100 125
C)
150
T , JUNCTION TEMPERATURE (
°
T , JUNCTION TEMPERATURE (
°
J
J
Figure 7. Current Limit
Figure 8. Dropout Voltage
1.0
2.5
2.0
I
= 500 mA
L
0.80
0.60
0.40
0.20
0
I
= 100 mA
L
1.5
1.0
T
= 25°C
J
T
= 125°C
J
0.5
0
10
20
30
40
50
–50
–25
0
25
50
75
100 125
C)
150
V
–V , INPUT–OUTPUT VOLTAGE DIFFERENTIAL (V)
T , JUNCTION TEMPERATURE (°
in out
J
Figure 9. Minimum Operating Current
Figure 10. Ripple Rejection versus Frequency
5.0
4.5
100
90
I
V
V
= 40 mA
L
4.0
3.5
3.0
2.5
80
70
60
50
40
30
20
10
= 5.0 V ± 1.0 V
= 1.25 V
in
PP
out
T
= 25°C
J
T
= 125°C
2.0
1.5
1.0
0.5
J
0
10
20
30
40
10
100
1.0 k
10 k
100 k 1.0 M
V
V
, INPUT–OUTPUT VOLTAGE DIFFERENTIAL (Vdc)
f, FREQUENCY (Hz)
in– out
5
MOTOROLA ANALOG IC DEVICE DATA
LM317M, LM317MA
Figure 11. Temperature Stability
Figure 12. Adjustment Pin Current
1.260
1.250
1.240
1.230
1.220
80
70
65
60
55
50
45
40
35
V
V
= 6.25 V
in
= V
out
ref
I
= 10 mA
= 100 mA
L
I
L
V
= 4.2 V
in
V
= V
out
= 5.0 mA
ref
I
L
–50 –25
0
25
50
75
100
125 150
–50 –25
0
25
50
75
100
C)
125 150
T , JUNCTION TEMPERATURE (
°
T , JUNCTION TEMPERATURE (°C)
J
J
Figure 13. Line Regulation
Figure 14. Output Noise
0.4
0.2
V
= 4.25 V to 41.25 V
= V
ref
in
V
Bandwidth 100 Hz to 10 kHz
out
= 5.0 mA
10
8.0
6.0
I
L
0
–0.2
–0.4
–0.6
–0.8
–1.0
4.0
–50 –25
0
25
50
75
100
125 150
–50 –25
0
25
50
75
100
125 150
T , JUNCTION TEMPERATURE (
°C)
T , JUNCTION TEMPERATURE (°C)
J
J
Figure 15. Line Transient Response
Figure 16. Load Transient Response
3.0
2.0
1.5
1.0
0.5
0
1.0
0
CL = 1.0
µF; CAdj = 10
µF
C
= 1.0 µF
L
= 15 V
= 10 V
–1.0
–2.0
–3.0
1.5
1.0
0.5
0
in
–0.5
–1.0
–1.5
1.0
C
= 0.3
µF; C
= 10 µF
L
Adj
V
= 10 V
= 50 mA
= 25°C
out
I
T
L
C
= 0
J
L
I
L
V
in
0.5
0
0
10
20
30
40
0
10
20
30
40
t, TIME (µs)
t, TIME (µs)
6
MOTOROLA ANALOG IC DEVICE DATA
LM317M, LM317MA
APPLICATIONS INFORMATION
Basic Circuit Operation
External Capacitors
The LM317M is a three–terminal floating regulator. In
operation, the LM317M develops and maintains a nominal
A 0.1 µF disc or 1.0 µF tantalum input bypass capacitor
(C ) is recommended to reduce the sensitivity to input line
in
1.25 V reference (V ) between its output and adjustment
impedance.
ref
terminals. This reference voltage is converted to a
The adjustment terminal may be bypassed to ground to
programming current (I
constant current flows through R to ground. The regulated
2
output voltage is given by:
) by R (see Figure 17), and this
improve ripple rejection. This capacitor (C ) prevents ripple
PROG
1
Adj
from being amplified as the output voltage is increased. A
10 µF capacitor should improve ripple rejection about 15 dB
at 120 Hz in a 10 V application.
R
2
Although the LM317M is stable with no output
capacitance, like any feedback circuit, certain values of
external capacitance can cause excessive ringing. An output
V
V
1
I
R
out
ref
Adj 2
R
1
capacitance (C ) in the form of a 1.0 µF tantalum or 25 µF
aluminum electrolytic capacitor on the output swamps this
effect and insures stability.
Since the current from the terminal (I ) represents an
Adj
O
error term in the equation, the LM317M was designed to
control I
to less than 100 µA and keep it constant. To do
Adj
this, all quiescent operating current is returned to the output
terminal. This imposes the requirement for a minimum load
current. If the load current is less than this minimum, the
output voltage will rise.
Since the LM317M is a floating regulator, it is only the
voltage differential across the circuit which is important to
performance, and operation at high voltages with respect to
ground is possible.
Protection Diodes
When external capacitors are used with any IC regulator it
is sometimes necessary to add protection diodes to prevent
the capacitors from discharging through low current points
into the regulator.
Figure 18 shows the LM317M with the recommended
protection diodes for output voltages in excess of 25 V or high
capacitance values (C > 25 µF, C
> 5.0 µF). Diode D
O
Adj
1
Figure 17. Basic Circuit Configuration
prevents C from discharging thru the IC during an input
O
short circuit. Diode D protects against capacitor C
2
Adj
discharging through the IC during an output short circuit. The
combination of diodes D and D prevents C from
V
V
out
in
LM317M
+
1
2
Adj
discharging through the IC during an input short circuit.
R
1
V
ref
Figure 18. Voltage Regulator with
Protection Diodes
Adjust
I
PROG
V
out
D
1
I
Adj
R
2
1N4002
V
= 1.25 V Typical
ref
V
V
in
out
V
LM317M
out
+
Load Regulation
C
R
C
O
in
1
The LM317M is capable of providing extremely good load
regulation, but a few precautions are needed to obtain
maximum performance. For best performance, the
programming resistor (R ) should be connected as close to
the regulator as possible to minimize line drops which
effectively appear in series with the reference, thereby
D
2
Adjust
1N4002
C
Adj
1
R
2
degrading regulation. The ground end of R can be returned
2
near the load ground to provide remote ground sensing and
improve load regulation.
7
MOTOROLA ANALOG IC DEVICE DATA
LM317M, LM317MA
Figure 19. Adjustable Current Limiter
Figure 20. 5 V Electronic Shutdown Regulator
D
V
I
O
V
1
R
O
+25V
out
1
LM317M
1.25k
1N4002
LM317M
V
in
V
V
in
out
V
V
out
in
Adjust
D1
R
+
2
1N914
1.0µF
120
500
D2
* To provide current limiting of I
to the system ground, the source of
the current limiting diode must be tied to
a negative voltage below – 7.25 V.
O
Adjust
720
1N914
MPS2222
1.0k
TTL
Control
1N5314
V
ref
R
R
≥
2
I
DSS
Minimum V
out
= 1.25 V
V
*
SS
V
ref
+ I
=
1
I
Omax DSS
D
protects the device during an input short circuit.
1
V
< P
OV
+ 1.25 V + V
O
SS
– I < I < 500 mA – I
P
I
Lmin
P
O
As shown O < I < 495 mA
O
Figure 21. Slow Turn–On Regulator
Figure 22. Current Regulator
I
V
out
out
R
R
2
V
V
1
LM317M
in
out
V
in
LM317M
240
1N4001
V
out
I
Adjust
50k
Adjust
Adj
R
2
MPS2907
+
10µF
V
1.25 V
ref
I
=
+ I
Adj
outmax
R
+ R
R
+ R
1
2
1
2
5.0 mA < I
< 100 mA
out
Figure 23. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
100
90
80
70
60
50
40
2.4
2.0
1.6
1.2
0.8
0.4
0
P
for T = 50°C
A
D(max)
Free Air
Mounted
Vertically
2.0 oz. Copper
L
Minimum
Size Pad
L
R
θ
JA
0
5.0
10
15
20
25
30
L, LENGTH OF COPPER (mm)
8
MOTOROLA ANALOG IC DEVICE DATA
LM317M, LM317MA
OUTLINE DIMENSIONS
T SUFFIX
PLASTIC PACKAGE
CASE 221A–06
ISSUE Y
NOTES:
SEATING
PLANE
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
–T–
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION Z DEFINES A ZONE WHERE ALL
BODY AND LEAD IRREGULARITIES ARE
ALLOWED.
B
F
C
T
S
4
1
INCHES
MIN
MILLIMETERS
DIM
A
B
C
D
F
MAX
0.620
0.405
0.190
0.035
0.147
0.105
0.155
0.025
0.562
0.060
0.210
0.120
0.110
0.055
0.255
0.050
–––
MIN
14.48
9.66
4.07
0.64
3.61
2.42
2.80
0.46
12.70
1.15
4.83
2.54
2.04
1.15
5.97
0.00
1.15
–––
MAX
15.75
10.28
4.82
0.88
3.73
2.66
3.93
0.64
14.27
1.52
5.33
3.04
2.79
1.39
6.47
1.27
–––
A
K
Q
Z
0.570
0.380
0.160
0.025
0.142
0.095
0.110
0.018
0.500
0.045
0.190
0.100
0.080
0.045
0.235
0.000
0.045
–––
2
3
U
H
G
H
J
K
L
N
Q
R
S
L
R
V
J
G
T
U
V
D
N
Z
0.080
2.04
DT–1 SUFFIX
PLASTIC PACKAGE
CASE 369–07
(DPAK)
ISSUE K
C
B
R
NOTES:
V
E
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
4
2
INCHES
MILLIMETERS
DIM
A
B
C
D
E
MIN
MAX
0.250
0.265
0.094
0.035
0.040
0.047
MIN
5.97
6.35
2.19
0.69
0.84
0.94
MAX
6.35
6.73
2.38
0.88
1.01
1.19
A
K
0.235
0.250
0.086
0.027
0.033
0.037
1
3
S
–T–
SEATING
PLANE
F
0.090 BSC
2.29 BSC
G
H
J
K
R
S
0.034
0.018
0.350
0.175
0.050
0.030
0.040
0.023
0.380
0.215
0.090
0.050
0.87
0.46
8.89
4.45
1.27
0.77
1.01
0.58
9.65
5.46
2.28
1.27
J
F
H
V
D 3 PL
0.13 (0.005)
G
M
T
9
MOTOROLA ANALOG IC DEVICE DATA
LM317M, LM317MA
OUTLINE DIMENSIONS
DT SUFFIX
PLASTIC PACKAGE
CASE 369A–13
(DPAK)
ISSUE Y
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
SEATING
PLANE
–T–
2. CONTROLLING DIMENSION: INCH.
C
B
R
INCHES
MILLIMETERS
E
V
DIM
A
B
C
D
E
MIN
MAX
0.250
0.265
0.094
0.035
0.040
0.047
MIN
5.97
6.35
2.19
0.69
0.84
0.94
MAX
6.35
6.73
2.38
0.88
1.01
1.19
0.235
0.250
0.086
0.027
0.033
0.037
4
2
Z
A
K
S
F
1
3
G
H
J
K
L
0.180 BSC
4.58 BSC
U
0.034
0.018
0.102
0.040
0.023
0.114
0.87
0.46
2.60
1.01
0.58
2.89
0.090 BSC
2.29 BSC
F
J
R
S
U
V
0.175
0.020
0.020
0.030
0.138
0.215
0.050
–––
0.050
–––
4.45
0.51
0.51
0.77
3.51
5.46
1.27
–––
1.27
–––
L
H
D 2 PL
0.13 (0.005)
Z
M
G
T
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LM317M/D
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