NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
Semelab Limited reserves the right to change test conditions, parameter limits and package dimensions without notice.
Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However
Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to
verify that datasheets are current before placing orders.
Semelab Limited
Semelab LimitedSemelab Limited
Semelab Limited
Coventry Road, Lutterworth, Leicestershire, LE17 4JB
Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Website: http://www.semelab-tt.com
Document Number 8380
Issue 1
Page 1 of 7
IP137K / LM137K
IP137AK / LM137AK
IP137HVK / LM137HVK
IP137AHVK / LM137AHVK
IP337K / LM337K
IP337AK / LM337AK
IP337HVK / LM337HVK
IP337AHVK / LM337AHVK
ABSOLUTE MAXIMUM RATINGS
(TC = 25°C unless otherwise stated)
Standard 40V
VI - VO Input – Output Voltage Differential HV Series 50V
IO Output Current Internally Limited
PD Power Dissipation Internally Limited
137 Series -55 to +150°C
TJ Operating Junction
Temperature Range 337 Series 0 to +125°C
Tstg Storage Temperature Range -65 to +150°C
THERMAL PROPERTIES
Symbols Parameters Min. Typ. Max. Units
RθJC
Thermal Resistance, Junction To Case 3 °C/W
** This datasheet supersedes document 2831
DESCRIPTION
The 137/337 Series regulators are adjustable 3 terminal voltage regulators capable of supplying in excess of -1.5A over an
output voltage range of -1.2V to -37V (HV Series, -47V). The regulators are exceptionally easy to apply requiring only 2 external
resistors to set the output voltage and 1 output capacitor for frequency compensation.
Every effort has been made to make these devices easy to use and difficult to damage. Internal current limiting and power
limiting coupled with true thermal limiting prevents damage due to overloads or shorts, even if the regulators are not fastened
to a heat sink.
FEATURES
• 1.5A Output Current Guaranteed
• Internal Thermal Overload Protection
• Output Short Circuit Protected
• Hermetic Metal TO3 Package
• Screening Options Available
APPLICATIONS
• Adjustable Power Supplies
• System Power Supplies
• Precision Voltage / Current Regulators
NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
Semelab Limited
Semelab LimitedSemelab Limited
Semelab Limited
Coventry Road, Lutterworth, Leicestershire, LE17 4JB
Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Website: http://www.semelab-tt.com
Document Number 8380
Issue 1
Page 2 of 7
ELECTRICAL CHARACTERISTICS(1)(3)
(TC = 25°C unless otherwise stated)
LM137, IP137, LM137HV, IP137HV
Symbols Parameters Test Conditions Min.
Typ Max.
Units
IOUT = 10mA
-1.225
-1.250
-1.275
VREF Reference Voltage 10mA ≤ IOUT ≤ IMAX, P ≤ PMAX,
3V ≤ (VIN-VOUT) ≤ VMAX
•
-1.200
-1.250
-1.300
V
0.010 0.020
IN
OUT
V
V
∆
∆
Line Regulation (2)
3V ≤ (VIN-VOUT) ≤ VMAX,
IOUT = 10mA
•
0.020 0.050
%/V
VOUT ≤ 5V
15 25 mV
VOUT ≥ 5V
0.3 0.5 %
VOUT ≤ 5V
•
20 50 mV
OUT
I
OUT
V
∆
∆
Load Regulation (2)(3) 10mA
≤
IOUT
≤
IMAX
VOUT
≥
5V
•
0.3 1.0 %
Thermal Regulation VIN = -14.58V, IOUT = 1.5A,
PD = 20W, TA = 25°C, 10ms Pulse
0.002 0.02 %/W
VOUT = -10V CADJ = 0
60
Ripple Rejection
f = 120Hz CADJ = 10µF
•
66 77
dB
IADJ Adjust Pin Current
•
65 100
10mA
≤
IOUT
≤
IMAX
•
0.5 5
3V
≤
(VIN-VOUT)
≤
40V
•
2 5
∆
IADJ Adjust Pin Current Change
3V
≤
(VIN-VOUT)
≤
50V (HV Series)
(HV Series)(HV Series)
(HV Series)
•
3 6
µA
(VIN - VOUT)
≤
40V
•
2.5 5
IMIN Minimum Load Current (VIN - VOUT)
≤
10V
•
1.2 3
mA
(VIN - VOUT)
≤
15V
•
1.5 2.2 3.2
(VIN - VOUT) = 40V
•
0.24 0.4
ICL Current Limit
(VIN - VOUT) = 50V (HV Series)
(HV Series)(HV Series)
(HV Series)
•
0.2 0.4 0.8
A
TEMP
OUT
V
∆
∆
Temperature Stability
•
0.6
TIME
OUT
V
∆
∆ Long Term Stability TA = 125°C, 1000Hrs
0.3 1.0
en RMS Output Noise
(% of VOUT) TA = 25°C, 10Hz ≤ f ≤ 10KHz
0.003
%
Notes
NotesNotes
Notes
The ● denotes the specifications which apply over the full operating temperature range.
(1) Test conditions unless otherwise stated: VIN - VOUT = 5V, IOUT = 0.5A, PMAX = 20W, IMAX = 1.5A
(2) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to heating
effects are covered under thermal regulation specifications. Load regulation is measured at
1
/
8
” below the bottom of the package.
(3) VMAX = 40V for LM137, IP137, LM137A, IP137A, LM337, IP337, LM337A, IP337A
VMAX = 50V for LM137HV, IP137HV, LM137AHV, IP137AHV, LM337HV, IP337HV, LM337AHV, IP337AHV
NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
Semelab Limited
Semelab LimitedSemelab Limited
Semelab Limited
Coventry Road, Lutterworth, Leicestershire, LE17 4JB
Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Website: http://www.semelab-tt.com
Document Number 8380
Issue 1
Page 3 of 7
ELECTRICAL CHARACTERISTICS(1)(3)
(TC = 25°C unless otherwise stated)
LM137A, IP137A, LM137AHV, IP137AHV
Symbols Parameters Test Conditions Min.
Typ Max.
Units
IOUT = 10mA
-1.238
-1.250
-1.262
VREF Reference Voltage 10mA ≤ IOUT ≤ IMAX, P ≤ PMAX,
3V ≤ (VIN-VOUT) ≤ VMAX
●
-1.220
-1.250
-1.280
V
0.005 0.010
IN
OUT
V
V
∆
∆
Line Regulation (2)
3V ≤ (VIN-VOUT) ≤ VMAX,
IOUT = 10mA
●
0.010 0.030
%/V
VOUT ≤ 5V
5 25 mV
VOUT ≥ 5V
0.1 0.5 %
VOUT ≤ 5V
●
10 50 mV
OUT
I
OUT
V
∆
∆ Load Regulation (2)(3) 10mA ≤ IOUT ≤ IMAX
VOUT ≥ 5V
●
0.2 1.0 %
Thermal Regulation VIN = -14.58V, IOUT = 1.5A,
PD = 20W, TA = 25°C, 10ms Pulse
0.002 0.02 %/W
VOUT = -10V CADJ = 0
60 66
Ripple Rejection
f = 120Hz CADJ = 10µF
●
70 80
dB
IADJ Adjust Pin Current
●
65 100
10mA ≤ IOUT ≤ IMAX
●
0.2 2
3V ≤ (VIN-VOUT) ≤ 40V
●
1.0 5
∆IADJ Adjust Pin Current Change
3V ≤ (VIN-VOUT) ≤ 50V (HV Series)
(HV Series)(HV Series)
(HV Series)
●
2 6
µA
(VIN - VOUT) ≤ 40V
●
2.5 5
IMIN Minimum Load Current (VIN - VOUT) ≤ 10V
●
1.2 3
mA
(VIN - VOUT) ≤ 15V
●
1.5 2.2 3.2
(VIN - VOUT) = 40V
●
0.24 0.4 1.0
ICL Current Limit
(VIN - VOUT) = 50V (HV Series)
(HV Series)(HV Series)
(HV Series)
●
0.2 0.4 0.8
A
TEMP
OUT
V
∆
∆ Temperature Stability
●
0.6 1.5
TIME
OUT
V
∆
∆ Long Term Stability TA = 125°C, 1000Hrs
0.3 1.0
en RMS Output Noise
(% of VOUT) TA = 25°C, 10Hz ≤ f ≤ 10KHz
0.003
%
Notes
NotesNotes
Notes
The ● denotes the specifications which apply over the full operating temperature range.
(1) Test conditions unless otherwise stated: VIN - VOUT = 5V, IOUT = 0.5A, PMAX = 20W, IMAX = 1.5A
(2) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to heating
effects are covered under thermal regulation specifications. Load regulation is measured at
1
/
8
” below the bottom of the package.
(3) VMAX = 40V for LM137, IP137, LM137A, IP137A, LM337, IP337, LM337A, IP337A
VMAX = 50V for LM137HV, IP137HV, LM137AHV, IP137AHV, LM337HV, IP337HV, LM337AHV, IP337AHV
NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
Semelab Limited
Semelab LimitedSemelab Limited
Semelab Limited
Coventry Road, Lutterworth, Leicestershire, LE17 4JB
Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Website: http://www.semelab-tt.com
Document Number 8380
Issue 1
Page 4 of 7
ELECTRICAL CHARACTERISTICS(1)(3)
(TC = 25°C unless otherwise stated)
LM337, IP337, LM337HV, IP337HV
Symbols Parameters Test Conditions Min.
Typ Max.
Units
IOUT = 10mA
-1.213
-1.250
-1.287
VREF Reference Voltage 10mA ≤ IOUT ≤ IMAX, P ≤ PMAX,
3V ≤ (VIN-VOUT) ≤ VMAX
•
-1.200
-1.250
-1.300
V
0.010 0.040
IN
OUT
V
V
∆
∆
Line Regulation (2)
3V ≤ (VIN-VOUT) ≤ VMAX,
IOUT = 10mA
•
0.020 0.070
%/V
VOUT ≤ 5V
15 50 mV
VOUT ≥ 5V
0.3 1.0 %
VOUT ≤ 5V
•
20 70 mV
OUT
I
OUT
V
∆
∆ Load Regulation (2)(3) 10mA ≤ IOUT ≤ IMAX
VOUT ≥ 5V
•
0.3 1.5 %
Thermal Regulation VIN = -14.58V, IOUT = 1.5A,
PD = 20W, TA = 25°C, 10ms Pulse
0.003 0.04 %/W
VOUT = -10V CADJ = 0
60
Ripple Rejection
f = 120Hz CADJ = 10µF
•
66 77
dB
IADJ Adjust Pin Current
•
65 100
10mA ≤ IOUT ≤ IMAX
•
0.5 5
3V ≤ (VIN-VOUT) ≤ 40V
•
2 5
∆IADJ Adjust Pin Current Change
3V ≤ (VIN-VOUT) ≤ 50V (HV Series)
(HV Series)(HV Series)
(HV Series)
•
3 6
µA
(VIN - VOUT) ≤ 40V
•
2.5 10
IMIN Minimum Load Current (VIN - VOUT) ≤ 10V
•
1.0 6
mA
(VIN - VOUT) ≤ 15V
•
1.5 2.2 3.5
(VIN - VOUT) = 40V
•
0.15 0.4
ICL Current Limit
(VIN - VOUT) = 50V (HV Series)
(HV Series)(HV Series)
(HV Series)
•
0.1 0.4 0.8
A
TEMP
OUT
V
∆
∆ Temperature Stability
•
0.6
TIME
OUT
V
∆
∆ Long Term Stability TA = 125°C, 1000Hrs
0.3 1.0
en RMS Output Noise
(% of VOUT) TA = 25°C, 10Hz ≤ f ≤ 10KHz
0.003
%
Notes
NotesNotes
Notes
The ● denotes the specifications which apply over the full operating temperature range.
(1) Test conditions unless otherwise stated: VIN - VOUT = 5V, IOUT = 0.5A, PMAX = 20W, IMAX = 1.5A
(2) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to heating
effects are covered under thermal regulation specifications. Load regulation is measured at
1
/
8
” below the bottom of the package.
(3) VMAX = 40V for LM137, IP137, LM137A, IP137A, LM337, IP337, LM337A, IP337A
VMAX = 50V for LM137HV, IP137HV, LM137AHV, IP137AHV, LM337HV, IP337HV, LM337AHV, IP337AHV
NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
Semelab Limited
Semelab LimitedSemelab Limited
Semelab Limited
Coventry Road, Lutterworth, Leicestershire, LE17 4JB
Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Website: http://www.semelab-tt.com
Document Number 8380
Issue 1
Page 5 of 7
ELECTRICAL CHARACTERISTICS(1)(3)
(TC = 25°C unless otherwise stated)
LM337A, IP337A, LM337AHV, IP337AHV
Symbols Parameters Test Conditions Min.
Typ Max.
Units
IOUT = 10mA
-1.238
-1.250
-1.262
VREF Reference Voltage 10mA ≤ IOUT ≤ IMAX, P ≤ PMAX,
3V ≤ (VIN-VOUT) ≤ VMAX
●
-1.220
-1.250
-1.280
V
0.005 0.010
IN
OUT
V
V
∆
∆
Line Regulation (2)
3V ≤ (VIN-VOUT) ≤ VMAX,
IOUT = 10mA
●
0.010 0.030
%/V
VOUT ≤ 5V
5 25 mV
VOUT ≥ 5V
0.1 0.5 %
VOUT ≤ 5V
●
10 50 mV
OUT
I
OUT
V
∆
∆ Load Regulation (2)(3) 10mA ≤ IOUT ≤ IMAX
VOUT ≥ 5V
●
0.2 1.0 %
Thermal Regulation VIN = -14.58V, IOUT = 1.5A,
PD = 20W, TA = 25°C, 10ms Pulse
0.002 0.02 %/W
VOUT = -10V CADJ = 0
60 66
Ripple Rejection
f = 120Hz CADJ = 10µF
●
70 80
dB
IADJ Adjust Pin Current
●
65 100
10mA ≤ IOUT ≤ IMAX
●
0.2 2
3V ≤ (VIN-VOUT) ≤ 40V
●
1.0 5
∆IADJ Adjust Pin Current Change
3V ≤ (VIN-VOUT) ≤ 50V (HV Series)
(HV Series)(HV Series)
(HV Series)
●
2 6
µA
(VIN - VOUT) ≤ 40V
●
2.5 5
IMIN Minimum Load Current (VIN - VOUT) ≤ 10V
●
1.2 3
mA
(VIN - VOUT) ≤ 15V
●
1.5 2.2 3.5
(VIN - VOUT) = 40V
●
0.24 0.4 1.0
ICL Current Limit
(VIN - VOUT) = 50V (HV Series)
(HV Series)(HV Series)
(HV Series)
●
0.2 0.4 0.8
A
TEMP
OUT
V
∆
∆ Temperature Stability
●
0.6 1.5
TIME
OUT
V
∆
∆ Long Term Stability TA = 125°C, 1000Hrs
0.3 1.0
en RMS Output Noise
(% of VOUT) TA = 25°C, 10Hz ≤ f ≤ 10KHz
0.003
%
Notes
NotesNotes
Notes
The ● denotes the specifications which apply over the full operating temperature range.
(1) Test conditions unless otherwise stated: VIN - VOUT = 5V, IOUT = 0.5A, PMAX = 20W, IMAX = 1.5A
(2) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to heating
effects are covered under thermal regulation specifications. Load regulation is measured at
1
/
8
” below the bottom of the package.
(3) VMAX = 40V for LM137, IP137, LM137A, IP137A, LM337, IP337, LM337A, IP337A
VMAX = 50V for LM137HV, IP137HV, LM137AHV, IP137AHV, LM337HV, IP337HV, LM337AHV, IP337AHV
NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
Semelab Limited
Semelab LimitedSemelab Limited
Semelab Limited
Coventry Road, Lutterworth, Leicestershire, LE17 4JB
Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Website: http://www.semelab-tt.com
Document Number 8380
Issue 1
Page 6 of 7
APPLICATIONS INFORMATION
High Stability Regulator
The output stability, load regulation, line regulation,
thermal regulation,
temperature drift, long term drift,
and noise, can be improved by a factor of 6.6 over
the standard regulator configuration. This assumes a
zener has 20PPM/°C maximum drift and about 10
times lower noise than the regulator.
Multiple Tracking Regulators
In the application shown below, regulator #2 to “N” will
track regulator #1 to within ±24mV initially, and to
±60mV over all load line, and temperature conditions.
If any regulator output is shorted to ground, all other
outputs will drop to -2V. Load regu
lation of regulators #2
to “N” will be improved by VOUT / 1.25V compared to a
standard, so regulator #1 should be the one which has
the lowest load current.
Dual Tracking Supply
Current Regulator
* Solid Tantalum
** R1 & R5 maybe trimmed slightly to improve tracking
R3
1.5k
1%
ADJ
IP137
V
IN
V
OUT
R1
1k
1%
1µF
–V
OUT
SOLID
TANTALUM
7V
R2 *
–V
IN
( )V
OUT
9.08 x 10
-3
– 908 Ω
R2 =
*
C3
10µF
R2
ADJ
IP137
V
IN
V
OUT
1N4002
R1
120 Ω
–V
IN
ADJ
IP137
V
IN
V
OUT
1N4002
2µF
C1
1µF
SOLID
TANTALUM
–V
OUT1
REG #1
2µF
REG #2
1µF
SOLID
TANTALUM
OUT2
–V
ADJ
IP137
V
IN
V
OUT
1N4002
2µF
REG #N
OUT N
–V
1µF
SOLID
TANTALUM
ADJ
IP137
V
IN
V
OUT
D2
1N4002
–V
OUT
IN
–V
R5**
100 Ω
1%
R3
5k
10µF
V
IN
V
OUT
ADJ
IP137
R1**
100 Ω
1%
10µF
2.2
µF
2.2
µF
D1
1N4002
IN
+V +V
OUT
R2
5k
1%
R4
5k
1%
*
*
ADJ
V
IN
V
OUT
(–) I
(+)
C1
1µF
SOLID
TANATALUM
IP137
R
S
0.8 Ω ≤ ≤ 250Ω
R
S
I = 65µA + 1.25 V
R
S
IP137
IP137
IP137
IP137
IP137
IP137
IP137
NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
Semelab Limited
Semelab LimitedSemelab Limited
Semelab Limited
Coventry Road, Lutterworth, Leicestershire, LE17 4JB
Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Website: http://www.semelab-tt.com
Document Number 8380
Issue 1
Page 7 of 7
MECHANICAL DATA
Dimensions in mm (inches)
TO3 (TO-204AA)
Pin 1 = ADJ. Pin 2 = VOUT Case = VIN
1 2
3
(case)
25.15 (0.99)
26.67 (1.05)
10.67 (0.42)
11.18 (0.44)
38.61 (1.52)
39.12 (1.54)
29.9 (1.177)
30.4 (1.197)
16.64 (0.655)
17.15 (0.675)
3.84 (0.151)
4.09 (0.161)
0.97 (0.060)
1.10 (0.043)
7.92 (0.312)
12.70 (0.50)
22.23
(0.875)
max.
6.35 (0.25)
9.15 (0.36)
1.52 (0.06)
3.43 (0.135)
