Datasheet

LT1033
9
1033fd
For more information www.linear.com/LT1033
Typical applicaTions
High Stability Regulator
Dual Tracking 3A Supply ±1.25V to ±20V
Current 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 whose drift
and noise is considerably better than the regulator itself.
The LM329B has 20ppm/°C maximum drift and about 10
times lower noise than the regulator.
In the application shown below, regulators #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 regulator, so regulator #1 should be the one
which has the lowest load current.
–V
OUT1
–V
OUT2
–V
OUT3
–V
IN
C1
2µF
SOLID
TANTALUM
2µF
2µF
2µF
C3
10µF
R2
R1
120Ω
1N4002
1N4002
2µF
SOLID
TANTALUM
2µF
SOLID
TANTALUM
+
+
+
ADJ
LT1033
REG #1
V
IN
V
OUT
ADJ
LT1033
REG #2
V
IN
V
OUT
ADJ
LT1033
REG #N
V
IN
V
OUT
1033 TA02
+
+
+
+
R2*
R1
1k
1%
R3
1.5k
1%
*R2 = – 908Ω
|V
OUT
|
9.08 • 10
–3
7V
LM329B
1µF
SOLID
TANTALUM
–V
OUT
+
ADJ
LT1033
–V
IN
V
IN
V
OUT
1033 TA03
R1**
100Ω
1%
R5**
100Ω
1%
R2
5k
1%
R4
5k
1%
10µF
10µF
R3
5k
2.2µF*
D1
1N4002
*SOLID TANTALUM
**R1 OR R5 MAY BE TRIMMED SLIGHTLY TO IMPROVE TRACKING
+V
OUT
–V
OUT
+V
IN
–V
IN
+
2.2µF*
D2
1N4002
+
+
+
ADJ
LT1033
V
IN
V
OUT
ADJ
LT150A
V
IN
V
OUT
1033 TA04
R
S
I
(+)
(O.5Ω ≤ R
S
≤ 250Ω) I = 65µA +
(–)
C1
2µF
SOLID TANTALUM
+
1.25V
R
S
ADJ
LT1033
V
IN
V
OUT
1033 TA05
Multiple Tracking Regulators