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| 型号： | LM137SMD05R4 |
| 厂商： | SEMELAB LTD |
| 元件分类： | 可调负电压单路输出标准稳压器 |
| 英文描述： | 1.25 V-40 V ADJUSTABLE NEGATIVE REGULATOR, CBCC3 |
| 封装： | CERAMIC, TO-276AA, 3 PIN |
| 文件页数： | 4/5页 |
| 文件大小： | 415K |
| 代理商： | LM137SMD05R4 |
NEGATIVE ADJUSTABLE
VOLTAGE REGULATOR
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 8377
Issue 1
Page 4 of 5
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.
Dual Tracking Supply
Current Regulator
* Solid Tantalum
** R1 & R5 maybe trimmed slightly to improve tracking
R3
1.5k
1%
ADJ
IP137
VIN
VOUT
R1
1k
1%
1F
–VOUT
SOLID
TANTALUM
7V
R2
*
–VIN
(
)
V
OUT
9.08 x 10 -3
– 908
R2 =
*
C3
10F
R2
ADJ
IP137
V
IN
V
OUT
1N4002
R1
120
–VIN
ADJ
IP137
V
IN
V
OUT
1N4002
2F
C1
1F
SOLID
TANTALUM
–VOUT1
REG #1
2F
REG #2
1F
SOLID
TANTALUM
OUT2
–V
ADJ
IP137
V
IN
V
OUT
1N4002
2F
REG #N
OUT N
–V
1F
SOLID
TANTALUM
ADJ
IP137
V
IN
V
OUT
D2
1N4002
–V
OUT
IN
–V
R5**
100
1%
R3
5k
10F
V
IN
V
OUT
ADJ
IP137
R1**
100
1%
10F
2.2
F
2.2
F
D1
1N4002
IN
+V
OUT
R2
5k
1%
R4
5k
1%
*
ADJ
V
IN
V
OUT
(–)
I
(+)
C1
1F
SOLID
TANATALUM
IP137
RS
0.8 ≤
≤ 250
R
S
I = 65A +
1.25 V
R
S
IP137
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