LM337T [FAIRCHILD]
3-Terminal 1.5A Negative Adjustable Regulator; 3端子1.5A负可调稳压器
| 型号： | LM337T |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | 3-Terminal 1.5A Negative Adjustable Regulator |
| 文件： | 总6页 (文件大小：39K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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LM337
3-Terminal 1.5A Negative Adjustable Regulator
Features
Description
• Output current in excess of 1.5A
The LM337 is a 3-terminal negative adjustable regulator. It
supplies in excess of 1.5A over an output voltage range of
-1.2V to - 37V. This regulator requires only two external
resistor to set the output voltage. Included on the chip are
current limiting, thermal overload protection and safe area
compensation.
• Output voltage adjustable between -1.2V and - 37V
• Internal thermal overload protection
• Internal short circuit current limiting
• Output transistor safe area compensation
• Floating operation for high voltage applications
• Standard 3-pin TO-220 package
TO-220
1
1. Adj 2. Input 3. Output
Internal Block Diagram
Vadj
1
3
Output
Voltage
Reference
-
+
Protection
Circuitry
Input
2
Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
LM337
Absolute Maximum Ratings
Parameter
Symbol
Value
40
Unit
V
Input-Output Voltage Differential
Power Dissipation
|V - V |
I
O
P
Internally limited
0 ~ +125
W
D
Operating Temperature Range
Storage Temperature Range
T
OPR
°C
°C
T
STG
-65 ~+125
Electrical Characteristics
(V - V = 5V, I = 40mA, 0°C ≤ T ≤ +125°C, P
= 20W, unless otherwise specified)
I
O
O
J
DMAX
Parameter
Symbol
Conditions
T = +25°C
Min
Typ.
Max.
Unit
A
-
0.01
0.04
3V ≤ I V - V I ≤ 40V
%/ V
I
O
Line Regulation (Note1)
Load Regulation (Note1)
R
line
3V ≤ I V - V I ≤ 40V
-
-
0.02
15
0.07
50
I
O
T = +25°C
A
R
10mA ≤ I ≤ 0.5A
mV
load
O
10mA ≤ I ≤ 1.5A
-
-
15
50
150
100
O
Adjustable Pin Current
I
-
µA
µA
ADJ
T =+ 25°C
A
Adjustable Pin Current Change
∆I
10mA ≤ I ≤ 1.5A
-
2
5
ADJ
O
3V ≤I V - V I ≤ 40V
I
O
T =+ 25°C
-1.213 -1.250 -1.287
-1.200 -1.250 -1.300
A
Reference Voltage
V
3V ≤ I V - V I ≤ 40V
I O
REF
V
10mA ≤ I ≤ 1.5A
O
Temperature Stability
ST
0°C ≤ ΤJ ≤ +125°C
-
-
0.6
2.5
-
10
6
-
%
T
Minimum Load Current to Maintain
Regulation
3V ≤I V - V I ≤ 40V
I O
I
L(MIN)
3V ≤I V - V I ≤ 10V
-
1.5
mA
V/106
I
O
Output Noise
e
T =+25°C 10Hz ≤ f ≤10KHz
A
-
0.003
60
N
V
= -10V, f = 120Hz
-
-
O
Ripple Rejection Ratio
RR
ST
C
ADJ
= 10µF (Note2)
66
-
77
-
dB
%
Long Term Stability
T = 125°C ,1000Hours
J
0.3
1
Thermal Resistance Junction to
Case
R
θJC
-
-
4
-
°C/ W
Note:
1. Load and line regulation are specified at constant junction temperature. Change in V
account separately. Pulse testing with low duty is used.
must be taken into
O due to heating effects
2. C , when used, is connected detween the adjustment pin and ground.
ADJ
2
LM337
Typical Application
IPROG
R2
+
+
Ci
0. 1µF
Co
1µF
Iadj
R1
Vadj
VI
Vo
-VI
LM337
-Vo
Figure 1. Programmable Regulator
• Ci is required if regulator is located more then 4 inches from power supply filter.
A 1.0µF solid tantalum or 10µF aluminum electrolytic is recommended.
Co is necessary for stability. A 1.0µF solid tantalum or 10µF aluminum electrolytic
is recommended.
• V = -1.25V (1+R /R )
O
2
1
3
LM337
Mechanical Dimensions
Package
TO-220
4.50 ±0.20
9.90 ±0.20
(8.70)
+0.10
–0.05
1.30
ø3.60 ±0.10
1.27 ±0.10
1.52 ±0.10
0.80 ±0.10
+0.10
–0.05
0.50
2.40 ±0.20
2.54TYP
2.54TYP
[2.54 ±0.20
]
[2.54 ±0.20]
10.00 ±0.20
4
LM337
Ordering Information
Product Number
Package
Operating Temperature
LM337T
TO-220
0°C to + 125°C
5
LM337
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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6/1/01 0.0m 001
Stock#DSxxxxxxxx
2001 Fairchild Semiconductor Corporation
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