LM317BD2TT4 [MOTOROLA]
1.2 V-37V ADJUSTABLE POSITIVE REGULATOR, PSSO2, PLASTIC, D2PAK-3;
| 型号： | LM317BD2TT4 |
| 厂家： | 
MOTOROLA |
| 描述： | 1.2 V-37V ADJUSTABLE POSITIVE REGULATOR, PSSO2, PLASTIC, D2PAK-3 输出元件 调节器 |
| 文件： | 总10页 (文件大小：184K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Order this document by LM317/D
The LM317 is an adjustable 3–terminal positive voltage regulator capable
of supplying in excess of 1.5 A 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.
THREE–TERMINAL
ADJUSTABLE POSITIVE
VOLTAGE REGULATOR
The LM317 serves a wide variety of applications including local, on card
regulation. This device can also be used to make a programmable output
regulator, or by connecting a fixed resistor between the adjustment and
output, the LM317 can be used as a precision current regulator.
SEMICONDUCTOR
TECHNICAL DATA
• Output Current in Excess of 1.5 A
• Output Adjustable between 1.2 V and 37 V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting Constant with Temperature
• Output Transistor Safe–Area Compensation
• Floating Operation for High Voltage Applications
T SUFFIX
PLASTIC PACKAGE
CASE 221A
2
• Available in Surface Mount D PAK, and Standard 3–Lead Transistor
Heatsink surface
connected to Pin 2.
Package
1
2
• Eliminates Stocking many Fixed Voltages
3
Pin 1. Adjust
2. V
3. V
out
in
Standard Application
V
V
in
out
LM317
D2T SUFFIX
R
240
1
PLASTIC PACKAGE
CASE 936
I
2
Adj
1
Adjust
2
(D PAK)
+
3
C
*
µ
C
1.0
**
µ
in
0.1
O
F
F
R
2
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
ORDERING INFORMATION
Operating
** C is required if regulator is located an appreciable distance from power supply filter.
in
** C is not needed for stability, however, it does improve transient response.
O
Temperature Range
Device
LM317BD2T
LM317BT
LM317D2T
LM317T
Package
R
2
Surface Mount
Insertion Mount
Surface Mount
Insertion Mount
V
1.25 V
1
I
R
out
2
Adj
T = –40° to +125°C
R
J
1
Since I
is controlled to less than 100 µA, the error associated with this term is
Adj
negligible in most applications.
T = 0° to +125°C
J
Motorola, Inc. 1996
Rev 1
LM317
MAXIMUM RATINGS
Rating
Symbol
V –V
Value
Unit
Input–Output Voltage Differential
40
Vdc
I
O
Power Dissipation
Case 221A
T
A
= +25°C
P
D
Internally Limited
W
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
θ
θ
65
5.0
°C/W
°C/W
JA
JC
2
Case 936 (D PAK)
= +25°C
T
P
θ
θ
Internally Limited
W
°C/W
°C/W
A
D
JA
JC
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
70
5.0
Operating Junction Temperature Range
Storage Temperature Range
T
–40 to +125
–65 to +150
°C
°C
J
T
stg
ELECTRICAL CHARACTERISTICS (V –V = 5.0 V; I = 0.5 A for D2T and T packages; T = T
to T
[Note 1]; I
and P
I
O
O
J
low
high
max
max
[Note 2]; unless otherwise noted.)
Characteristics
Line Regulation (Note 3), T = +25°C, 3.0 V ≤ V –V ≤ 40 V
Figure
Symbol
Min
Typ
Max
Unit
1
2
Reg
–
0.01
0.04
%/V
mV
A
I
O
line
Load Regulation (Note 3), T = +25°C, 10 mA ≤ I ≤ I
Reg
load
A
O
max
V
V
≤ 5.0 V
≥ 5.0 V
–
–
5.0
0.1
25
0.5
O
O
% V
O
Thermal Regulation, T = +25°C (Note 6), 20 ms Pulse
Reg
–
–
–
0.03
50
0.07
100
5.0
% V /W
O
A
therm
Adjustment Pin Current
3
I
µA
µA
Adj
Adjustment Pin Current Change, 2.5 V ≤ V –V ≤ 40 V,
1, 2
∆I
Adj
0.2
I
O
10 mA ≤ I ≤ I
, P ≤ P
D max
L
max
Reference Voltage, 3.0 V ≤ V –V ≤ 40 V,
3
V
ref
1.2
–
1.25
0.02
1.3
V
I
O
10 mA ≤ I ≤ I
, P ≤ P
D max
O
max
Line Regulation (Note 3), 3.0 V ≤ V –V ≤ 40 V
1
2
Reg
0.07
% V
mV
I
O
line
Load Regulation (Note 3), 10 mA ≤ I ≤ I
Reg
O
max
load
V
O
V
O
≤ 5.0 V
≥ 5.0 V
–
–
20
0.3
70
1.5
% V
O
Temperature Stability (T
≤ T ≤ T
)
3
3
3
T
–
–
0.7
3.5
–
% V
low
J
high
S
O
Minimum Load Current to Maintain Regulation (V –V = 40 V)
I
Lmin
10
mA
A
I
O
Maximum Output Current
V –V ≤ 15 V, P ≤ P
I
max
T Package
1.5
0.15
2.2
0.4
–
–
I
O
D
max,
V –V = 40 V, P ≤ P , T = +25°C, T Package
I
O
D
max
A
RMS Noise, % of V , T = +25°C, 10 Hz ≤ f ≤ 10 kHz
N
–
0.003
–
% V
O
O
A
Ripple Rejection, V = 10 V, f = 120 Hz (Note 4)
4
3
RR
dB
O
Without C
–
66
65
80
–
–
Adj
C
= 10 µF
Adj
Long–Term Stability, T = T
J
Endpoint Measurements
(Note 5), T = +25°C for
S
–
0.3
1.0
%/1.0 k
Hrs.
high
A
Thermal Resistance Junction to Case, T Package
R
–
5.0
–
°C/W
θJC
NOTES: 1. T
to T
high
= 0° to +125°C, for LM317T, D2T.
= 20 W
T
to T = –40° to +125°C, for LM317BT, BD2T.
high
low
low
2. I
= 1.5 A, P
max
max
3. 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.
4. C , when used, is connected between the adjustment pin and ground.
Adj
5. 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.
6. Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting individual IC components on the die. These
effects can be minimized by proper integrated circuit design and layout techniques. Thermal Regulation is the effect of these temperature gradients
on the output voltage and is expressed in percentage of output change per watt of power change in a specified time.
2
MOTOROLA ANALOG IC DEVICE DATA
LM317
Representative Schematic Diagram
V
in
5.6k
31
0
310
230
120
6.3V
170
160
6.7k
12k
5.0pF
13k
200
125k
6.3V
12.4k
510
6.8k
135
6.3V
30
pF
30
pF
2.4k
105
4.0
12.5k
190
3.6k 5.8k 110
5.1k
0.1
V
out
Adjust
This device contains 29 active transistors.
Figure 1. Line Regulation and ∆I
/Line Test Circuit
Adj
V
CC
|V
–V
|
OH OL
|V
V
V
V
IH
IL
OH
OL
Line Regulation (% V)
x 100
*
|
V
OL
V
V
out
in
LM317
Adjust
* Pulse testing required.
* 1% Duty Cycle
* is suggested.
240
1%
R
+
1
I
C
0.1
µF
Adj
C
1.0
µF
R
L
in
O
R
1%
2
3
MOTOROLA ANALOG IC DEVICE DATA
LM317
Figure 2. Load Regulation and ∆I
/Load Test Circuit
Adj
V
V
V
out
I
in
I
LM317
L
V
V
(min Load)
(max Load)
O
O
R
L
(max Load)
240
1%
R
Adjust
L
R
1
*
(min Load)
+
C
0.1
µF
C
1.0 µF
in
O
I
Adj
* Pulse testing required.
* 1% Duty Cycle is suggested.
R
1%
2
V
(min Load) – V (max Load)
O
O
Load Regulation (mV) = V (min Load) – V (max Load)
Load Regulation (% V ) =
x 100
O
O
O
V
(min Load)
O
Figure 3. Standard Test Circuit
V
V
out
in
I
LM317
L
Adjust
240
1%
R
V
R
L
V
1
ref
I
I
Adj
+
C
0.1
µF
C
1.0 µF
V
in
O
O
I
SET
R
1%
2
* Pulse testing required.
* 1% Duty Cycle is suggested.
To Calculate R : V R + 1.250 V
= I
To Calculate R : Assume I
2
out SET 2
= 5.25 mA
SET
2
Figure 4. Ripple Rejection Test Circuit
24 V
14 V
V
V
out
in
LM317
f = 120 Hz
D *
1
240
1%
Adjust
R
R
L
1N4002
1
V
= 10 V
out
+
C
0.1
µF
C
1.0
µF
V
O
in
O
+
1.65 k
1%
C
10 µF
R
Adj
2
* D Discharges C
Adj
if output is shorted to Ground.
1
4
MOTOROLA ANALOG IC DEVICE DATA
LM317
Figure 5. Load Regulation
Figure 6. Current Limit
4.0
3.0
2.0
0.4
0.2
0
I
= 0.5 A
T = 25°C
J
L
–0.2
–0.4
–0.6
–0.8
–1.0
I
= 1.5 A
150°C
L
V
V
= 15 V
in
1.0
0
55°C
= 10 V
out
–50
–25
0
25
50
75
100 125
C)
150
0
10
20
30
40
V
–V , INPUT–OUTPUT VOLTAGE DIFFERENTIAL (Vdc)
T , JUNCTION TEMPERATURE (
°
in out
J
Figure 7. Adjustment Pin Current
Figure 8. Dropout Voltage
3.0
70
65
60
∆
V
= 100 mV
out
I
= 1.5 A
L
2.5
2.0
1.5
1.0
1.0 A
55
50
500 mA
45
40
35
200 mA
20 mA
–50 –25
0
25
50
75
100
C)
125 150
–50 –25
0
25
50
75
100
125 150
T , JUNCTION TEMPERATURE (
°
T , JUNCTION TEMPERATURE (°C)
J
J
Figure 9. Temperature Stability
Figure 10. Minimum Operating Current
5.0
4.5
1.26
1.25
T
= –55°C
J
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
+25°C
+150
°
C
1.24
1.23
1.22
0
–50 –25
0
25
50
75
100
C)
125 150
0
10
V –V , INPUT–OUTPUT VOLTAGE DIFFERENTIAL (Vdc)
in out
20
30
40
T , JUNCTION TEMPERATURE (
°
J
5
MOTOROLA ANALOG IC DEVICE DATA
LM317
Figure 12. Ripple Rejection versus
Output Current
Figure 11. Ripple Rejection versus Output Voltage
100
C
= 10 µF
Adj
120
100
80
60
40
20
Without C
Adj
C
= 10 µF
Adj
80
60
40
20
0
Without C
Adj
V
I
– V
= 5 V
= 500 mA
in
L
out
V
= 15 V
= 10 V
in
V
out
f = 120 Hz
T
f = 120 Hz
= 25
°C
J
T
= 25
°C
J
0
0
5.0
10
15
20
25
30
35
0.01
0.1
, OUTPUT CURRENT (A)
O
1.0
10
I
V
, OUTPUT VOLTAGE (V)
out
Figure 14. Output Impedance
Figure 13. Ripple Rejection versus Frequency
1
0
10
100
80
I
= 500 mA
V
V
= 15 V
= 10 V
= 500 mA
L
in
out
10
V
= 15 V
in
V
= 10 V
I
out
L
60
T
= 25°C
T
= 25°C
J
J
–1
–2
–3
10
10
10
40
20
Without C
Adj
C
= 10 µF
C
= 10 µF
Adj
Adj
Without C
Adj
0
10
100
1.0 k 10 k
100 k
1.0 M 10 M
10
100
1.0 k
10 k
100 k
1.0 M
f, FREQUENCY (Hz)
f, FREQUENCY (Hz)
Figure 15. Line Transient Response
Figure 16. Load Transient Response
3.0
2.0
1.0
0
1.5
C
C
= 1.0
µ
F;
µ
L
1.0
0.5
0
C
C
= 1.0
µ
F;
µ
L
= 10
F
Adj
= 10
F
Adj
–1.0
–2.0
–3.0
1.5
1.0
0.5
0
= 15 V
= 10 V
= 50 mA
in
–0.5
–1.0
–1.5
1.0
V
= 10 V
= 50 mA
= 25°C
C
= 0;
out
L
I
I
Without C
L
T
Adj
= 25°C
C
= 0;
L
J
Without C
Adj
I
V
L
in
0.5
0
0
10
20
30
40
0
10
20
t, TIME (µs)
30
40
t, TIME (
µs)
6
MOTOROLA ANALOG IC DEVICE DATA
LM317
APPLICATIONS INFORMATION
Basic Circuit Operation
External Capacitors
The LM317 is a 3–terminal floating regulator. In operation,
the LM317 develops and maintains a nominal 1.25 V
A 0.1 µF disc or 1.0 µF tantalum input bypass capacitor
(C ) is recommended to reduce the sensitivity to input line
in
reference (V ) between its output and adjustment terminals.
impedance.
ref
This reference voltage is converted to a programming current
The adjustment terminal may be bypassed to ground to
(I
)byR (seeFigure17),andthisconstantcurrentflows
improve ripple rejection. This capacitor (C ) prevents ripple
PROG
1
Adj
through R to ground.
2
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.
Although the LM317 is stable with no output capacitance,
like any feedback circuit, certain values of external
capacitance can cause excessive ringing. An output
The regulated output voltage is given by:
R
2
V
V
1
I
R
out
2
ref
Adj
R
1
Since the current from the adjustment terminal (I
)
Adj
represents an error term in the equation, the LM317 was
designed to control I to less than 100 µA and keep it
constant. To do 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 LM317 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.
capacitance (C ) in the form of a 1.0 µF tantalum or 25 µF
O
aluminum electrolytic capacitor on the output swamps this
effect and insures stability.
Adj
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 LM317 with the recommended
protection diodes for output voltages in excess of 25 V or high
Figure 17. Basic Circuit Configuration
capacitance values (C > 25 µF, C > 10 µF). Diode D
O
Adj 1
prevents C from discharging thru the IC during an input
O
V
V
out
in
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
LM317
out
+
1
2
Adj
R
1
discharging through the IC during an input short circuit.
V
ref
Adjust
I
PROG
Figure 18. Voltage Regulator with Protection Diodes
D
1
I
Adj
R
2
V
1N4002
out
V
= 1.25 V Typical
ref
V
V
in
out
LM317
Load Regulation
+
The LM317 is capable of providing extremely good load
regulation, but a few precautions are needed to obtain
maximum performance. For best performance, the
C
R
C
O
in
1
D
2
Adjust
1N4002
C
Adj
programming resistor (R ) should be connected as close to
1
R
the regulator as possible to minimize line drops which
effectively appear in series with the reference, thereby
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.
2
Figure 19. D PAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
3.5
3.0
80
70
P
for T = +50°C
A
D(max)
Free Air
Mounted
Vertically
2.0 oz. Copper
L
60
50
40
30
2.5
2.0
Minimum
Size Pad
L
1.5
1.0
R
θ
JA
0
5.0
10
15
20
25
30
L, LENGTH OF COPPER (mm)
7
MOTOROLA ANALOG IC DEVICE DATA
LM317
Figure 20. ‘‘Laboratory’’ Power Supply with Adjustable Current Limit and Output Voltage
D *
6
1N4002
I
out
V
V
in2
R
V
out 2
out1
SC
LM317
LM317
V
V
in
32 V to 40 V
out
(1)
(2)
V
in1
+
1.0
240
D
5
IN4001
0.1
µF
µF
Tantalum
D
1
Adjust 1
1N4001
Adjust 2
+
1.0K
D
2
5.0 k
10 µF
Current
Limit
Voltage
Adjust
1N4001
Adjust
1N4001
Q
1
D
2N3822
3
4
* Diodes D and D and transistor Q are added to
* allow adjustment of output voltage to 0 V.
Output Range: 0
Output Range: 0
≤ V ≤
≤ I ≤
O
25 V
1.5 A
1
2
2
O
D
* D protects both LM317’s during an input short circuit.
6
–10 V
IN4001
Q
2
2N5640
–10 V
Figure 21. Adjustable Current Limiter
Figure 22. 5.0 V Electronic Shutdown Regulator
D *
1
V
R
+25 V
out
1
I
out
LM317
1.25
1N4002
V
in
V
V
in
out
LM317
Adjust
D
1
R
+
2
1N4001
1.0 µF
120
100
D
2
Adjust
720
1N4001
MPS2222
1.0 k
* To provide current limiting of I to the system
* ground, the source of the FET must be tied to a
* negative voltage below – 1.25 V.
O
TTL
Control
2N5640
V
V
ref
I
DDS
ref
+ I
R
≤
R
=
2
1
Minimum V
out
= 1.25 V
I
Omax DSS
V
*
SS
V
< BV + 1.25 V + V
,
O
DSS
– I
SS
* D protects the device during an input short circuit.
1
I
< I < 1.5 A.
O
O
Lmin DSS
As shown 0 < I < 1.0 A.
Figure 23. Slow Turn–On Regulator
Figure 24. Current Regulator
I
out
V
V
V
in
R
1
V
out
out
in
LM317
LM317
240
1N4001
I
Adj
Adjust
Adjust
50 k
V
R
2
ref
MPS2907
+
I
I
out
Adj
R
10 µF
1
1.25 V
R
1
10 mA
≤
I
≤
1.5 A
out
8
MOTOROLA ANALOG IC DEVICE DATA
LM317
OUTLINE DIMENSIONS
T SUFFIX
PLASTIC PACKAGE
CASE 221A–06
ISSUE Y
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIM Z DEFINES A ZONE WHERE ALL BODY AND
LEAD IRREGULARITIES ARE ALLOWED.
SEATING
–T
PLANE
–
F
B
C
T
S
INCHES
MILLIMETERS
DIM
A
B
C
D
F
G
H
J
K
L
N
Q
R
S
MIN
MAX
0.620
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
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
–
4
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
–
A
K
Q
Z
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
–
1
2
3
U
H
L
R
J
V
T
U
V
G
D
Z
0.080
2.04
N
D2T SUFFIX
PLASTIC PACKAGE
CASE 936–03
2
(D PAK)
ISSUE B
OPTIONAL
CHAMFER
NOTES:
TERMINAL 4
1
DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
–T
–
A
U
2
3
CONTROLLING DIMENSION: INCH.
TAB CONTOUR OPTIONAL WITHIN DIMENSIONS
A AND K.
E
4
5
DIMENSIONS U AND V ESTABLISH A MINIMUM
MOUNTING SURFACE FOR TERMINAL 4.
DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH OR GATE PROTRUSIONS. MOLD FLASH
AND GATE PROTRUSIONS NOT TO EXCEED
0.025 (0.635) MAXIMUM.
S
K
V
B
H
F
INCHES
MILLIMETERS
MIN MAX
9.804 10.236
1
2
3
DIM
A
B
C
D
E
MIN
MAX
0.403
0.368
0.180
0.036
0.055
0.386
0.356
0.170
0.026
0.045
M
L
9.042
4.318
0.660
1.143
9.347
4.572
0.914
1.397
P
J
N
F
0.051 REF
0.100 BSC
0.539 0.579 13.691 14.707
0.125 MAX
0.050 REF
1.295 REF
2.540 BSC
D
G
H
J
K
L
M
N
P
R
S
R
M
0.010 (0.254)
T
3.175 MAX
1.270 REF
G
0.000
0.088
0.018
0.058
5
0.010
0.102
0.026
0.078
0.000
0.254
2.591
0.660
1.981
2.235
0.457
1.473
5
REF
REF
C
0.116 REF
0.200 MIN
0.250 MIN
2.946 REF
5.080 MIN
6.350 MIN
U
V
9
MOTOROLA ANALOG IC DEVICE DATA
LM317
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specificallydisclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,including“Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applicationsintended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
ordeathmayoccur. ShouldBuyerpurchaseoruseMotorolaproductsforanysuchunintendedorunauthorizedapplication,BuyershallindemnifyandholdMotorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and
Opportunity/Affirmative Action Employer.
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Mfax is a trademark of Motorola, Inc.
How to reach us:
USA/EUROPE/Locations Not Listed: Motorola Literature Distribution;
P.O. Box 5405, Denver, Colorado 80217. 303–675–2140 or 1–800–441–2447
JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 4–32–1,
Nishi–Gotanda, Shinagawa–ku, Tokyo 141, Japan. 81–3–5487–8488
Mfax : RMFAX0@email.sps.mot.com – TOUCHTONE 602–244–6609
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– US & Canada ONLY 1–800–774–1848 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
INTERNET: http://motorola.com/sps
LM317/D
◊
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