LM120K-12 National Semiconductor, LM120K-12 Datasheet - Page 7

• Manufacturer Part Number: LM120K-12
• Description: Series 3-Terminal Negative Regulators
• Manufacturer: National Semiconductor

Typical Applications
inputs
Necessary only if raw supply capacitors are more than 3 from regulators
An LM3086N array may substitute for Q1 D1 and D2 for better stability and
tracking In the array diode transistors Q5 and Q4 (in parallel) make up D2
similarly Q1 and Q2 become D1 and Q3 replaces the 2N2222
V
SELECT R2 AS FOLLOWS
LM120-5
LM120-12
LM120-15
Lamp brightness increases until i
Necessary only of raw supply filter capacitor is more than 2
LM320MP
Resistor tolerance of R1 and R2 determine matching of (
Optional Improves transient response and ripple rejection
OUT
e
V
SET
R1
Wide Range Tracking Regulator
b
b
b
R2
300
750
1k
a
R2
Variable Output
I
e
5V R1 (i
(Continued)
I
can be set as low as 1 A)
Light Controllers Using Silicon Photo Cells
TL H 7767– 10
TL H 7767 – 7
TL H 7767 – 9
a
) and (
from
b
)
7
Lamp brightness increases until i
Necessary only if raw supply filter capacitor is more than 2 from LM320
Load Regulation at I
Output Ripple C
Temperature Stability
Output Noise 10 Hz
Resistor tolerance of R4 and R5 determine matching of (
(
Necessary only if raw supply filter capacitors are more than 2
from regulators
b
) outputs
g
15V 1 Amp Tracking Regulators
IN
Performance (Typical)
e
s
L
3000 F I
f
e
Current Source
s
1A
10 kHz
I
L
e
e
i
Q
1A
(1 mA)
100 Vrms
150 Vrms
a
a
10 mV
50 mV
5V R1
I
OUT
a
e
100 Vrms
150 Vrms
TL H 7767 – 12
TL H 7767 – 11
) and
a
TL H 7767– 8
1 mA
1 mV
50 mV
a
5 0V
R1