IP137 Просмотр технического описания (PDF) - Semelab - > TT Electronics plc
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IP137 Datasheet PDF : 4 Pages
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IP137A SERIES
IP137A SERIES
IP337A SERIES
IP337A SERIES
LM137A SERIES
LM137A SERIES
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.
R 2*
7V
R3
R1
1.5k
1k
1%
1%
1µF
S O LID
TANTALUM
ADJ
VIN
VOU T
– VIN
* R2 =
( VOUT )
9.08 x 10 -3
– 908 Ω
–VO U T
IP337A
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.
2 µF
C3
1 0µF
R2
C1
1µF
SO L ID
ADJ
1N4002
R1
120 Ω
TANTALUM
VIN
VOU T
–VIN
REG #1
– VO U T1
IP137A
IP317A
+ VIN
VIN
VO U T
ADJ
+ VO U T
R1**
100 Ω
1%
D1
2.2
1N4002
µF
R2
1 0µF
5k
1%
R3
5k
R4
1 0µF
5k
1%
R5**
100 Ω
1%
2.2
µF
D2
1N4002
ADJ
– VIN
VIN
VO U T
–VO U T
IP337A
* Solid Tantalum
** R1 or R5 may be trimmed slightly to improve tracking.
Dual Tracking Supply
2 µF
VIN
ADJ
VOU T
REG #2
IP137A
1N4002
1µF
SO L ID
TA NTA LU M
–VO U T2
2 µF
VIN
ADJ
VOU T
REG #N
IP137A
1N4002
1µF
SO L ID
TA NTA LU M
–VO UT N
C1
1 µF
ADJ
(–)
VIN
VOU T
S O LID
TANA TALU M
I
(+ )
RS
IP337A
I = 65µA +
1.25 V
RS
0.8 Ω ≤ RS ≤ 250Ω
Current Regulator
Part
Number
LM137
LM137HV
LM137A
LM137AHV
IP137
IP137HV
IP137A
IP137AHV
LM337
LM337HV
IP337
IP337HV
IP337A
IP337AHV
K–Pack
(TO–3)
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
Order Information
IG–Pack
R–Pack G–Pack T–Pack
(TO–66) (TO–257) (TO–220)
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
SG–Pack Temp.
SMD1
Range
✔ -55 to +150°C
✔
”
✔
”
✔
”
✔ -55 to +150°C
✔
”
✔
”
✔
”
0 to 125°C
0 to 125°C
0 to 125°C
”
0 to 125°C
”
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
Prelim. 7/00
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