NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
IP137SMD
/
IP137ASMD
/
IP137HVSMD /
IP137AHVSMD /
LM137SMD
LM137ASMD
LM137HVSMD
LM137AHVSMD
FEATURES
•
•
•
•
•
1.5A Output Current Guaranteed
Internal Thermal Overload Protection
Output Short Circuit Protected
Hermetic Ceramic Surface Mount Package
Screening Options Available
APPLICATIONS
•
•
•
Adjustable Power Supplies
System Power Supplies
Precision Voltage / Current Regulators
DESCRIPTION
The 137 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.
ABSOLUTE MAXIMUM RATINGS
(TC = 25°C unless otherwise stated)
VI - VO
IO
PD
TJ
Tstg
Input – Output Voltage Differential
Standard
HV Series
Output Current
Power Dissipation
Operating Junction Temperature Range
Storage Temperature Range
40V
50V
Internally Limited
Internally Limited
-55 to +150°C
-65 to +150°C
THERMAL PROPERTIES
Symbols
R
θJC
Parameters
Thermal Resistance, Junction To Case
Min.
Typ.
Max.
3.5
Units
°C/W
** This datasheet supersedes document 2831
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
Coventry Road, Lutterworth, Leicestershire, LE17 4JB
Telephone +44 (0) 1455 556565
Fax +44 (0) 1455 552612
Email:
sales@semelab-tt.com
Document Number 8211
Issue 3
Page 1 of 5
Website:
http://www.semelab-tt.com
NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS(1)(3)
(TC = 25°C unless otherwise stated)
LM137, IP137, LM137HV, IP137HV
Symbols
VREF
Parameters
Reference Voltage
Test Conditions
IOUT = 10mA
10mA
≤
IOUT
≤
IMAX, P
≤
PMAX,
3V
≤
(VIN-VOUT)
≤
VMAX
3V
≤
(VIN-VOUT)
≤
VMAX,
IOUT = 10mA
VOUT
≤
5V
Min.
-1.225
Typ
-1.250
Max.
-1.275
Units
V
•
-1.200 -1.250
0.010
-1.300
0.020
0.050
25
0.5
50
1.0
0.02
∆
V
OUT
∆
V
IN
Line Regulation (2)
•
%/V
mV
%
mV
%
%/W
dB
0.020
15
0.3
∆
VOUT
∆
IOUT
Load Regulation (2)(3)
10mA
≤
IOUT
≤
IMAX
VOUT
≥
5V
VOUT
≤
5V
VOUT
≥
5V
•
•
20
0.3
0.002
60
66
77
65
0.5
2
3
2.5
1.2
1.5
0.24
0.2
2.2
0.4
0.4
0.6
0.3
0.003
Thermal Regulation
Ripple Rejection
IADJ
Adjust Pin Current
VIN = -14.58V, IOUT = 1.5A,
PD = 20W, TA = 25°C, 10ms Pulse
VOUT = -10V
f = 120Hz
CADJ = 0
CADJ = 10µF
•
•
10mA
≤
IOUT
≤
IMAX
100
5
5
6
5
3
3.2
µA
•
•
•
•
•
•
•
•
•
∆
IADJ
Adjust Pin Current Change
3V
≤
(VIN-VOUT)
≤
40V
3V
≤
(VIN-VOUT)
≤
50V (HV Series)
IMIN
Minimum Load Current
(VIN - VOUT)
≤
40V
(VIN - VOUT)
≤
10V
(VIN - VOUT)
≤
15V
mA
ICL
Current Limit
(VIN - VOUT) = 40V
(VIN - VOUT) = 50V (HV Series)
A
0.8
∆
VOUT
∆
TEMP
∆
VOUT
∆
TIME
en
Temperature Stability
Long Term Stability
RMS Output Noise
(% of VOUT)
TA = 125°C, 1000Hrs
TA = 25°C, 10Hz
≤
f
≤
10KHz
1.0
%
Notes
The
●
denotes the specifications which apply over the full operating temperature range.
(1)
(2)
Test conditions unless otherwise stated: VIN - VOUT = 5V, IOUT = 0.5A, PMAX = 20W, IMAX = 1.5A
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 the junction of the wide and narrow portion of
the output lead.
VMAX = 40V for LM137, IP137, LM137A, IP137A
VMAX = 50V for LM137HV, IP137HV, LM137AHV, IP137AHV
(3)
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 8211
Issue 3
Page 2 of 5
NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS(1)(3)
(TC = 25°C unless otherwise stated)
LM137A, IP137A, LM137AHV, IP137AHV
Symbols
VREF
Parameters
Reference Voltage
Test Conditions
IOUT = 10mA
10mA
≤
IOUT
≤
IMAX, P
≤
PMAX,
3V
≤
(VIN-VOUT)
≤
VMAX
3V
≤
(VIN-VOUT)
≤
VMAX,
IOUT = 10mA
VOUT
≤
5V
Min.
-1.238
Typ
-1.250
Max.
-1.262
Units
V
●
-1.220 -1.250
0.005
-1.280
0.010
0.030
25
0.5
50
1.0
0.02
mV
%
mV
%
%/W
∆
V
OUT
∆
V
IN
Line Regulation (2)
%/V
●
0.010
5
0.1
∆
VOUT
∆
IOUT
Load Regulation (2)(3)
10mA
≤
IOUT
≤
IMAX
VOUT
≥
5V
VOUT
≤
5V
VOUT
≥
5V
●
●
10
0.2
0.002
60
70
66
80
65
0.2
1.0
2
2.5
1.2
1.5
0.24
0.2
2.2
0.4
0.4
0.6
0.3
0.003
Thermal Regulation
VIN = -14.58V, IOUT = 1.5A,
PD = 20W, TA = 25°C, 10ms Pulse
VOUT = -10V
f = 120Hz
CADJ = 0
CADJ = 10µF
●
Ripple Rejection
IADJ
Adjust Pin Current
dB
100
2
5
6
5
3
3.2
1.0
0.8
1.5
1.0
%
A
mA
µA
●
10mA
≤
IOUT
≤
IMAX
●
●
●
●
●
●
●
●
●
∆
IADJ
Adjust Pin Current Change
3V
≤
(VIN-VOUT)
≤
40V
3V
≤
(VIN-VOUT)
≤
50V (HV Series)
IMIN
Minimum Load Current
(VIN - VOUT)
≤
40V
(VIN - VOUT)
≤
10V
(VIN - VOUT)
≤
15V
ICL
Current Limit
(VIN - VOUT) = 40V
(VIN - VOUT) = 50V (HV Series)
∆
VOUT
∆
TEMP
∆
VOUT
∆
TIME
en
Temperature Stability
Long Term Stability
RMS Output Noise
(% of VOUT)
TA = 125°C, 1000Hrs
TA = 25°C, 10Hz
≤
f
≤
10KHz
Notes
The
●
denotes the specifications which apply over the full operating temperature range.
(1)
(2)
Test conditions unless otherwise stated: VIN - VOUT = 5V, IOUT = 0.5A, PMAX = 20W, IMAX = 1.5A
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 the junction of the wide and narrow portion of
the output lead.
VMAX = 40V for LM137, IP137, LM137A, IP137A
VMAX = 50V for LM137HV, IP137HV, LM137AHV, IP137AHV
(3)
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 8211
Issue 3
Page 3 of 5
NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
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 regulation 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.
C3
10µF
R2
*
2µF
R2
7V
SOLID
TANTALUM
R1
1k
1%
1µF
ADJ
–V
IN
V
IN
V
OUT
REG #1
1N4002
C1
1µF
SOLID
TANTALUM
R1
120
Ω
–V
OUT1
R3
1.5k
1%
ADJ
V
IN
–V
IN
*
V
OUT
( V
OUT
)
R2 = 9.08 x 10
-3
– 908
Ω
–V
OUT
IP137
IP137
IP137
IP137
1µF
2µF
1N4002
ADJ
V
IN
SOLID
TANTALUM
–V
OUT2
V
REG #2
OUT
IP137
IP137
Dual Tracking Supply
IP137
IP137
+V
IN
V
IN
ADJ
R1**
100
Ω
1%
V
OUT
+V
2µF
1N4002
1µF
ADJ
SOLID
TANTALUM
–V
OUT N
OUT
V
IN
V
OUT
REG #N
*
2.2
µF
D1
1N4002
IP137
IP137
10µF
R2
5k
1%
R3
5k
Current Regulator
C1
1µF
SOLID
TANATALUM
V
OUT
R
S
I
(+)
1.25 V
R
S
10µF
R4
5k
1%
2.2
µF
*
R5**
100
Ω
1%
ADJ
–V
IN
V
IN
V
OUT
ADJ
D2
1N4002
(–)
V
IN
IP137
IP137
–V
OUT
I = 65µA +
0.8
Ω ≤
R
S
≤
250Ω
IP137
IP137
* Solid Tantalum
** R1 & R5 maybe trimmed slightly to improve tracking
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 8211
Issue 3
Page 4 of 5
NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
MECHANICAL DATA
Dimensions in mm (inches)
0.89
(0.035)
min.
3.70 (0.146)
3.41 (0.134)
3.70 (0.146)
3.41 (0.134)
3.60 (0.142)
Max.
4.14 (0.163)
3.84 (0.151)
1
3
0.76
(0.030)
min.
10.69 (0.421)
10.39 (0.409)
2
9.67 (0.381)
9.38 (0.369)
11.58 (0.456)
11.28 (0.444)
16.02 (0.631)
15.73 (0.619)
0.50 (0.020)
0.26 (0.010)
SMD1 (TO276AB)
Pin 1 = ADJ.
Pin 2 = VIN
Pin 3 = VOUT
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 8211
Issue 3
Page 5 of 5
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