LM337D2TR4G [ONSEMI]
1.5 A, Adjustable Output, Negative Voltage Regulator; 1.5 A ，可调输出，负电压稳压器
| 型号： | LM337D2TR4G |
| 厂家： | 
ONSEMI |
| 描述： | 1.5 A, Adjustable Output, Negative Voltage Regulator |
| 文件： | 总10页 (文件大小：134K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
C
O
LM337
1.5 A, Adjustable Output,
Negative Voltage Regulator
The LM337 is an adjustable 3−terminal negative 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.
The LM337 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 LM337 can be used as a precision current
regulator.
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THREE−TERMINAL
ADJUSTABLE NEGATIVE
VOLTAGE REGULATOR
MARKING
DIAGRAMS
Features
• Output Current in Excess of 1.5 A
• Output Adjustable between −1.2 V and −37 V
• Internal Thermal Overload Protection
LM
337yyyy
AWLYWWG
2
D PAK
• Internal Short Circuit Current Limiting Constant with Temperature
• Output Transistor Safe−Area Compensation
• Floating Operation for High Voltage Applications
• Eliminates Stocking many Fixed Voltages
D2T SUFFIX
CASE 936
1
2
• Available in Surface Mount D PAK and Standard 3−Lead Transistor
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
Package
• Pb−Free Packages are Available
Pin 1. Adjust
2. V
3. V
in
out
Standard Application
TO−220AB
T SUFFIX
I
PROG
CASE 221AB
LM
337xx
AWLYWWG
R
2
+
+
Heatsink surface
connected to Pin 2.
C *
in
C **
O
1.0 mF
R
1
1.0 mF
120
1
I
Adj
xx
= BT, T
V
in
V
out
yyyy = BD2T, D2T
A
LM337
−V
in
−V
out
= Assembly Location
WL = Wafer Lot
Y
= Year
WW = Work Week
= Pb−Free Package
*C is required if regulator is located more than 4 inches from power supply filter.
in
*ꢁA 1.0 mF solid tantalum or 10 mF aluminum electrolytic is recommended.
G
** is necessary for stability. A 1.0 mF solid tantalum or 10 mF aluminum electrolytic
**ꢁis recommended.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
R
2
ꢀ +ꢀ –1.25ꢀVꢀǒ1 ) Ǔ
V
out
R
1
© Semiconductor Components Industries, LLC, 2006
1
Publication Order Number:
August, 2006 − Rev. 6
LM337/D
LM337
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
Case 221A
T = +25°C
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
P
q
q
Internally Limited
W
°C/W
°C/W
A
D
JA
JC
65
5.0
2
Case 936 (D PAK)
T = +25°C
Internally Limited
W
°C/W
°C/W
P
q
q
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
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
ELECTRICAL CHARACTERISTICS (|V V | = 5.0 V; I = 0.5 A for T package; T = T to T
[Note 1]; I
and P
max
[Note 2].)
Unit
I−
O
O
J
low
high
max
Characteristics
Line Regulation (Note 3), T = +25°C, 3.0 V ≤ |V −V | ≤ 40 V
Figure
Symbol
Min
Typ
Max
1
2
Reg
−
0.01
0.04
%/V
A
I
O
line
Load Regulation (Note 3), T = +25°C, 10 mA ≤ I ≤ I
Reg
A
O
max
load
|V | ≤ 5.0 V
−
−
15
0.3
50
1.0
mV
O
|V | ≥ 5.0 V
% V
O
O
Thermal Regulation, T = +25°C (Note 5), 10 ms Pulse
Reg
−
−
−
0.003
65
0.04
100
5.0
% V /W
A
therm
O
Adjustment Pin Current
3
I
mA
mA
Adj
Adjustment Pin Current Change, 2.5 V ≤ |V −V | ≤ 40 V,
1, 2
DI
2.0
I
O
Adj
10 mA ≤ I ≤ I
, P ≤ P
, T = +25°C
L
max
D
max A
Reference Voltage, T = +25°C, 3.0 V ≤ |V −V | ≤ 40 V,
3
V
ref
−1.21 −1.25 −1.28
V
A
I
O
10 mA ≤ I ≤ I
, P ≤ P
, T = T
to T
high
3
0
7
O
max
D
max
J
low
−1.20 −1.25 −1.30
Line Regulation (Note 3), 3.0 V ≤ |V −V | ≤ 40 V
1
2
Reg
−
0.02
0.07
%/V
mV
I
O
line
Load Regulation (Note 3), 10 mA ≤ I ≤ I
Reg
O
max
load
|V | ≤ 5.0 V
−
−
20
0.3
70
1.5
O
|V | ≥ 5.0 V
% V
O
O
Temperature Stability (T
≤ T ≤ T
)
3
3
T
−
0.6
−
% V
low
J
high
S
O
Minimum Load Current to Maintain Regulation
I
mA
A
Lmin
(|V −V | ≤ 10 V)
−
−
1.5
2.5
6.0
10
I
O
(|V −V | ≤ 40 V)
I
O
Maximum Output Current
|V −V | ≤ 15 V, P ≤ P
3
I
max
, T Package
, T = +25°C, T Package
J
−
−
1.5
0.15
2.2
0.4
I
O
D
max
max
|V −V | ≤ 40 V, P ≤ P
I
O
D
RMS Noise, % of V , T = +25°C, 10 Hz ≤ f ≤ 10 kHz
N
−
0.003
−
% V
O
A
O
Ripple Rejection, V = −10 V, f = 120 Hz (Note 4)
4
3
RR
dB
O
Without C
−
66
60
77
−
−
Adj
C
= 10 mF
Adj
Long−Term Stability, T = T
(Note 6), T = +25°C for
S
−
0.3
1.0
%/1.0 k
Hrs.
J
high
A
Endpoint Measurements
Thermal Resistance, Junction−to−Case, T Package
R
−
4.0
−
°C/W
q
JC
1. T
to T
= 1.5 A, P
= 0° to +125°C, for LM337T, D2T.
max
T
low
to T
= −40° to +125°C, for LM337BT, BD2T.
low
high
high
2. I
= 20 W
max
3. Load and line regulation are specified at constant junction temperature. Change in V because of heating effects is covered under the
O
Thermal Regulation specification. Pulse testing with a low duty cycle is used.
4. C , when used, is connected between the adjustment pin and ground.
Adj
5. 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.
6. 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.
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2
LM337
Representative Schematic Diagram
Adjust
60
100
2.0k
2.5k
810
21k
V
out
10k
800
25pF
15pF
220
5.0k
2.0k
75
0
60k
100k
15pF
800
18k
4.0k
6.0k
100
1.0k
2.2k
18k
240
3.0k
9.6k
30k
270
2.0
pF
250
5.0pF
5.0k
100pF
20k
8.0k
0.2
100k
600
15
2.9k
4.0k
155
2.4k
500
15
500
0.05
V
in
This device contains 39 active transistors.
R
2
1%
+
C
O
1.0 mF
C
in
1.0 mF
I
Adj
120
1%
R
1
R
L
Adjust
*ꢀPulse testing required.
ꢂꢀ1% Duty Cycle
ꢂꢀis suggested.
V
in
V
out
LM337
V
V
V
IH
OH
V
OL
IL
*
|V –V
|
OL OH
LineꢀRegulationꢀ(%ńV)ꢀ +ꢀ
xꢀ100
V
EE
|V
|
OH
Figure 1. Line Regulation and DIAdj/Line Test Circuit
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3
LM337
*ꢀPulse testing required.
ꢂꢀ1% Duty Cycle is suggested.
R
2
1%
C
O
+
C
in
1.0 mF
1.0 mF
I
Adj
R
1
120
*
Adjust
R
L
(max
Load)
−V (min Load)
O
V
in
V
out
−V
I
L
LM337
−V (max Load)
O
I
V
O
(min Load) − V (max Load)
O
Load Regulation (mV) = V (min Load) − V (max Load)
Load Regulation (% V ) =
x 100
O
O
O
V
O
(min Load)
Figure 2. Load Regulation and DIAdj/Load Test Circuit
1%
R
2
+
C
O
C
in
1.0 mF
1.0 mF
V
O
V
I
R
L
V
ref
I
Adj
R
1
120
Adjust
V
in
V
out
I
LM337
L
V
O
To Calculate R :
R =
2
R
1
− 1
2
V
ref
* Pulse testing required.
This assumes I is negligible.
* 1% Duty Cycle is suggested.
Adj
Figure 3. Standard Test Circuit
+
C
Adj
10mF
R
2
1%
+
V
O
C
in
C
O
1.0 mF
1.0 mF
R
L
Adjust
D *
1
1N4002
120
R
1
V
in
V
out
LM337
V
out
= −1.25 V
14.3 V
4.3 V
* D Discharges C if output is shorted to Ground.
1
Adj
f = 120 Hz
Figure 4. Ripple Rejection Test Circuit
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4
LM337
0.2
0
4.0
3.0
2.0
1.0
0
I = 0.5 A
L
−0.2
−0.4
−0.6
−0.8
−1.0
−1.2
−1.4
T = 25°C
J
I = 1.5 A
L
V
= −15 V
= −10 V
in
V
out
0
10
20
30
40
−50 −25
0
25
50
75
100 125 150
V −V , INPUT−OUTPUT VOLTAGE DIFFERENTIAL (Vdc)
in out
T , JUNCTION TEMPERATURE (°C)
J
Figure 5. Load Regulation
Figure 6. Current Limit
3.0
2.5
2.0
1.5
1.0
80
75
70
65
60
55
50
45
40
V
= −5.0 V
out
DV = 100 mV
O
I = 1.5 A
L
1.0 A
500 mA
200 mA
20 mA
−50 −25
0
25
50 75
100 125 150
−50 −25
0
25
50 75
100 125 150
T , JUNCTION TEMPERATURE (°C)
J
T , JUNCTION TEMPERATURE (°C)
J
Figure 7. Adjustment Pin Current
Figure 8. Dropout Voltage
1.27
1.26
1.25
1.24
1.23
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
T = 25°C
J
−50 −25
0
25
50 75
100 125 150
0
10
20
30
40
T , JUNCTION TEMPERATURE (°C)
J
V −V , INPUT−OUTPUT VOLTAGE DIFFERENTIAL (Vdc)
in out
Figure 9. Temperature Stability
Figure 10. Minimum Operating Current
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5
LM337
100
80
60
40
20
0
100
C
= 10 mF
Adj
C
= 10 mF
Adj
80
Without C
Adj
60
40
Without C
Adj
V
= −15 V
= −10 V
in
V
− V = 5.0 V
out
in
V
out
I = 500 mA
L
20
0
f = 120 Hz
T = 25°C
J
f = 120 Hz
T = 25°C
J
0
−5.0
−10
−15
−20
−25
−30
−35
−40
0.01
0.1
1.0
10
I , OUTPUT CURRENT (A)
O
V , OUTPUT VOLTAGE (V)
out
Figure 11. Ripple Rejection versus Output Voltage
Figure 12. Ripple Rejection versus Output Current
1
0
100
80
60
40
20
0
10
V
V
= −15 V
= −10 V
V
V
= −15 V
= −10 V
in
in
out
out
I = 500 mA
I = 500 mA
L
10
L
T = 25°C
J
C = 1.0 mF
T = 25°C
J
C
Adj
=10 mF
L
−1
−2
−3
10
10
10
Without C
Adj
Without C
Adj
C
Adj
= 10 mF
10
100 1.0 k
10 k 100 k 1.0 M
f, FREQUENCY (Hz)
10 M
10
100
1.0 k
10 k
100 k
1.0 M
f, FREQUENCY (Hz)
Figure 13. Ripple Rejection versus Frequency
Figure 14. Output Impedance
0.6
0.4
0.2
0
0.8
0.6
0.4
Without C
Adj
0.2
0
−0.2
Without C
= −10 V
I = 50 mA
T = 25°C
C = 1.0 mF
C
Adj
= 10 mF
Adj
−0.4
−0.6
C
= 10 mF
Adj
−0.2
−0.4
V
in
= −15 V
0
V
out
= −10 V
V
out
0
−0.5
−1.0
−0.5
I = 50 mA
L
L
T = 25°C
J
J
−1.0
−1.5
C = 1.0 mF
L
L
0
10
20
30
40
0
10
20
30
40
t, TIME (ms)
t, TIME (ms)
Figure 15. Line Transient Response
Figure 16. Load Transient Response
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6
LM337
APPLICATIONS INFORMATION
Basic Circuit Operation
The LM337 is a 3−terminal floating regulator. In
operation, the LM337 develops and maintains a nominal
degrading regulation. The ground end of R can be returned
near the load ground to provide remote ground sensing and
improve load regulation.
2
−1.25 V reference (V ) between its output and adjustment
ref
terminals. This reference voltage is converted to a
External Capacitors
programming current (I
) by R (see Figure 17), and this
PROG
1
A 1.0 mF tantalum input bypass capacitor (C ) is
recommended to reduce the sensitivity to input line
impedance.
The adjustment terminal may be bypassed to ground to
improve ripple rejection. This capacitor (C ) prevents
ripple from being amplified as the output voltage is
increased. A 10 mF capacitor should improve ripple
rejection about 15 dB at 120 Hz in a 10 V application.
in
constant current flows through R from ground.
2
The regulated output voltage is given by:
R
2
ꢀǒ1 ) Ǔꢀ )ꢀ I
V
ꢀ +ꢀ V
out
ꢀR
2
Adj
ref
R
Adj
1
Since the current into the adjustment terminal (I
)
Adj
represents an error term in the equation, the LM337 was
designed to control I to less than 100 mA and keep it
Adj
An output capacitance (C ) in the form of a 1.0 mF
O
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 LM337 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.
tantalum or 10 mF aluminum electrolytic capacitor is
required for stability.
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 LM337 with the recommended
protection diodes for output voltages in excess of −25 V or
high capacitance values (C > 25 mF, C > 10 mF). Diode
+
V
out
R
PROG
O
Adj
2
I
D prevents C from discharging thru the IC during an input
I
1
O
Adj
+
short circuit. Diode D protects against capacitor C
2
Adj
C
O
discharging through the IC during an output short circuit.
The combination of diodes D and D prevents C from
R
1
Adjust
V
ref
1
2
Adj
the discharging through the IC during an input short circuit.
V
in
V
out
−
LM337
+
V
out
V
out
+
R
2
C
Adj
V
ref
= −1.25 V Typical
+
+
Figure 17. Basic Circuit Configuration
C
in
C
O
Adjust
LM337
R
1
D
2
Load Regulation
1N4002
−V
in
− V
out
The LM337 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
V
in
V
out
D1
1N4002
1
Figure 18. Voltage Regulator with Protection Diodes
3.5
80
P
D(max)
for T = +50°C
A
3.0
70
60
50
40
30
Free Air
Mounted
Vertically
2.0 oz. Copper
L
2.5
2.0
Minimum
Size Pad
L
1.5
1.0
R
q
JA
0
5.0
10
15
20
25
30
L, LENGTH OF COPPER (mm)
Figure 19. D2PAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
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7
LM337
ORDERING INFORMATION
Device
†
Operating Temperature Range
Package
Shipping
2
LM337BD2T
D PAK
2
50 Units / Rail
LM337BD2TG
D PAK
(Pb−Free)
2
LM337BD2TR4
D PAK
T = −40° to +125°C
J
2
800 / Tape & Reel
LM337BD2TR4G
D PAK
(Pb−Free)
LM337BT
TO−220AB
LM337BTG
TO−220AB
(Pb−Free)
50 Units / Rail
2
LM337D2T
D PAK
2
LM337D2TG
D PAK
(Pb−Free)
2
LM337D2TR4
D PAK
T = 0° to +125°C
J
2
800 / Tape & Reel
50 Units / Rail
LM337D2TR4G
D PAK
(Pb−Free)
LM337T
TO−220AB
LM337TG
TO−220AB
(Pb−Free)
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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8
LM337
PACKAGE DIMENSIONS
D2T SUFFIX
CASE 936−03
(D2PAK)
ISSUE B
OPTIONAL
CHAMFER
NOTES:
TERMINAL 4
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. TAB CONTOUR OPTIONAL WITHIN DIMENSIONS
A AND K.
−T
−
A
U
E
4. DIMENSIONS U AND V ESTABLISH A MINIMUM
MOUNTING SURFACE FOR TERMINAL 4.
5. 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
DIM MIN MAX
MILLIMETERS
MIN MAX
9.804 10.236
1
2
3
A
B
C
D
E
F
0.386
0.356
0.170
0.026
0.045
0.403
0.368
0.180
0.036
0.055
M
9.042
4.318
0.660
1.143
9.347
4.572
0.914
1.397
L
P
J
0.051 REF
0.100 BSC
0.539 0.579 13.691 14.707
0.125 MAX
0.050 REF
0.000
0.088
0.018
0.058
1.295 REF
2.540 BSC
N
D
G
H
J
R
0.010 (0.254) M
T
3.175 MAX
1.270 REF
G
K
L
0.010
0.102
0.026
0.078
0.000
0.254
2.591
0.660
1.981
M
N
P
R
S
U
V
2.235
0.457
1.473
5_REF
5_REF
C
0.116 REF
0.200 MIN
0.250 MIN
2.946 REF
5.080 MIN
6.350 MIN
SOLDERING FOOTPRINT*
8.38
0.33
1.016
0.04
10.66
0.42
5.08
0.20
3.05
0.12
17.02
0.67
mm
inches
ǒ
Ǔ
SCALE 3:1
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
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9
LM337
PACKAGE DIMENSIONS
TO−220, SINGLE GAUGE
T SUFFIX
CASE 221AB−01
ISSUE O
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION Z DEFINES A ZONE WHERE ALL
BODY AND LEAD IRREGULARITIES ARE
ALLOWED.
SEATING
PLANE
−T−
C
B
F
T
S
INCHES
DIM MIN MAX
MILLIMETERS
4
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
0.508
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
B
C
D
F
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
0.020
0.235
0.000
0.045
−−−
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
−−−
A
K
Q
Z
1
2
3
U
H
G
H
J
K
L
N
Q
R
S
T
L
R
V
J
G
U
V
Z
D
0.080
2.04
N
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