lm337ahvk Semelab Group, lm337ahvk Datasheet - Page 6

• Manufacturer Part Number: lm337ahvk
• Description: Negative Adjustable Voltage Regulator
• Manufacturer: Semelab Group

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.
–V
Dual Tracking Supply
Semelab Limited
Semelab Limited
Semelab Limited
Semelab Limited
Telephone [phone]
+V
–V
IN
IN
IN
* Solid Tantalum
** R1 & R5 maybe trimmed slightly to improve tracking
V
10µF
10µF
V
V
IN
IN
IN
IP137
IP137
IP137
IP137
IP137
IP137
ADJ
ADJ
ADJ
Coventry Road, Lutterworth, Leicestershire, LE17 4JB
R2
5k
1%
R4
5k
1%
V
V
V
OUT
OUT
OUT
*
Fax [phone]
R2 =
1.5k
R3
1%
9.08 x 10
(
R1**
100 Ω
1%
R5**
100 Ω
1%
7V
R3
5k
V
OUT
)
-3
1%
R1
1k
R2
– 908 Ω
*
2.2
µF
2.2
µF
*
*
SOLID
TANTALUM
1 µ F
1N4002
1N4002
Email:
–V
D1
D2
OUT
+V
–V
[e-mail]
OUT
OUT
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 V OUT / 1.25V compared to a
standard, so regulator #1 should be the one which has
the lowest load current.
–V
IN
2µF
Website:
2µF
2µF
(–)
V
V
V
IN
IN
IN
IP137
IP137
IP137
IP137
http://www.semelab-tt.com
REG #1
REG #2
REG #N
IP137
IP137
ADJ
ADJ
ADJ
Current Regulator
V
V
V
V
IN
OUT
OUT
OUT
IP137
IP137
ADJ
V
1N4002
1N4002
1N4002
OUT
I = 65µA +
C3
10µF
0.8 Ω ≤
1µF
SOLID
TANATALUM
Document Number 8380
C1
R
R2
S
1.25 V
R1
120 Ω
R
R
≤ 250Ω
S
S
1µF
SOLID
TANTALUM
1µF
C1
1µF
SOLID
TANTALUM
SOLID
TANTALUM
Page 6 of 7
–V
–V
–V
Issue 1
OUT1
OUT2
OUT N
(+)
I