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LM137K Datasheet(PDF) 4 Page - STMicroelectronics

Part No. LM137K
Description  NEGATIVE VOLTAGE REGULATORS THREE-TERMINAL ADJUSTABLE
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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LM137K Datasheet(HTML) 4 Page - STMicroelectronics

 
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ELECTRICAL CHARACTERISICS
LM137: -55
o C< Tj < 150 oC
LM237: -25
o C< Tj < 150 oC
LM337: 0
oC< Tj < 150 oC
VI -VO =5V, IO = 0.5 A (unless otherwise specified)
Symbol
Parameter
LM137/LM237
LM337
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Vref
Reference Voltage
Tamb =25
oC
Tmin
≤ Tj ≤ Tmax
3V
≤ |VI -VO| ≤ 40V, 10mA ≤ |IO| ≤ |IO(max)|
P
≤ Pmax
-1.225
-1.2
-1.25
-1.25
-1.275
-1.3
-1.213
-1.2
-1.25
-1.25
-1.287
-1.3
V
KVI
Line Regulation
(Tamb =25
oC, 3V ≤ |VI -VO| ≤ 40V) - Note 2
IO = 0.1 A
IO =20 mA
0.01
0.01
0.02
0.02
0.01
0.01
0.04
0.04
%/V
%/V
KVO
Load Regulation
(Tamb =25
oC, 10mA ≤ |IO| ≤ |IO(max)|) - Note 2
|VO|
≤ 5V
|VO|
≥ 5V
15
0.3
25
0.5
15
0.3
50
1
mV
%
Thermal Regulation (Tamb =25
oC, pulse 10 ms)
0.002
0.02
0.003
0.04
%/W
Iadj
Adjustment Pin Current
65
100
65
100
µA
∆Iadj
Adjustment Pin Current Change
(Tamb =25
oC, 10mA ≤ |IO| ≤ |IO(max)|,
3V
≤ |VI -VO| ≤ 40V)
25
2
5
µA
KVI
Line Regulation (3V
≤ |VI -VO| ≤ 40V) - Note 2
0.02
0.05
0.02
0.07
%/V
KVO
Load Regulation
(10mA
≤ |IO| ≤ |IO(max)|) - Note 2
|VO|
≤ 5V
|VO|
≥ 5V
20
0.3
50
1
20
0.3
70
1.5
mV
%
|IO(min)|
Minimum Load Current
|VI -VO|
≤ 40V
|VI -VO|
≤ 10V
2.5
1.2
5
3
2.5
1.5
10
6
mA
mA
IOS
Short Circuit Output Current
|VI -VO|
≤ 15V (TO-3 and TO-220)
|VI -VO|
≤ 15V (TO-39)
|VI -VO| = 40V, Tj =25
oC (TO-3 and TO-220)
|VI -VO| = 40V, Tj =25
oC (TO-39)
1.5
0.5
0.24
0.15
2.2
0.4
0.2
1.5
0.5
0.15
0.1
2.2
0.4
0.2
A
A
A
A
VNO
RMS Output Noise (% of VO)
Tamb =25
oC, 10Hz ≤ f ≤ 10KHz
0.003
0.003
%
Rvf
Ripple Rejection Ratio
VO = - 10 V, f = 120 Hz
Cadj =10
µF66
60
77
66
60
77
dB
dB
KVT
Temperature Stability
0.6
0.6
%
KVH
Long Term Stability (Tamb = 125
oC, 1000H)
0.3
1
0.3
1
%
Notes : 1. Although power dissipation is internally limited, these specifications are applicable for power dissipation of :
• 2W for TO-39
• 15W for TO-220
• 20W for TO-3 Package
IO(max) is :
• 1.5A for TO-3 and TO-220
• 0.5A for TO-39
2. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in out-
put voltage due to heating effects are covered under the specification for thermal regulation.
LM137-LM237-LM337
4/14


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