IG–Pack
Part
K–Pack
R–Pack
G–Pack
T–Pack
SG–Pack
Temp.
Number
(TO–3)
(TO–66)
(TO–257) (TO–220)
SMD1
Range
LM137
-55 to +150°C
LM137HV
”
LM137A
”
LM137AHV
”
IP137
-55 to +150°C
IP137HV
”
IP137A
”
IP137AHV
”
LM337
0 to 125°C
LM337HV
0 to 125°C
IP337
0 to 125°C
IP337HV
”
IP337A
0 to 125°C
IP337AHV
”
Prelim. 7/00
IP137A SERIES
IP137A SERIES
IP337A SERIES
IP337A SERIES
LM137A SERIES
LM137A SERIES
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk
R3
1. 5k
1%
AD J
IP337A
V
IN
V
OU T
R1
1k
1%
R2
1
F
–VOUT
SO LID
TA NT A LUM
7V
*
–VIN
* R2 =
(
)
VOUT
9.08 x 10 -3
– 908
C3
10
F
R2
AD J
IP137A
V
IN
V
OU T
1N4 0 02
R1
120
–VIN
AD J
IP137A
VIN
VOUT
1N4 0 02
2
F
C1
1
F
SO LID
TANTA LUM
–VOUT1
REG #1
2
F
REG #2
1
F
SO LID
TA NTA LU M
OUT2
–V
AD J
IP 137A
V
IN
V
OU T
1N4 0 02
2
F
REG #N
1
F
SO LID
TA NTA LU M
OUT N
–V
AD J
IP3 37A
VIN
VOUT
D2
1N 40 02
–VOUT
IN
–V
R5* *
100
1%
R3
5k
10
F
V
IN
V
OU T
AD J
IP3 17A
R1* *
100
1%
10
F
2. 2
F
2. 2
F
D1
1N 40 02
IN
+V
OUT
R2
5k
1%
R4
5k
1%
AD J
VIN
VOUT
(–)
I
(+)
C1
1
F
SO LID
TA NA TALU M
IP 337A
R S
0.8
≤
≤ 250
RS
I = 65
A + 1.25 V
RS
Current Regulator
Dual Tracking Supply
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 regulator,
so regulator #1 should be the one which has the lowest load
current.
* Solid Tantalum
** R1 or R5 may be trimmed slightly to improve tracking.
Order Information