LM7808A Fairchild Semiconductor, LM7808A Datasheet - Page 23

• Manufacturer Part Number: LM7808A
• Manufacturer: Fairchild Semiconductor

LM78XX/LM78XXA Rev. 1.1
Notes:
1. To specify an output voltage, substitute voltage value for “XX.” A common ground is required between the input and the
2. C
3. C
output voltage. The input voltage must remain typically 2.0V above the output voltage even during the low point on the input
ripple voltage.
I
O
is required if regulator is located an appreciable distance from power supply filter.
improves stability and transient response.
I
V
RI
O
≥ 5 I
= V
Input
Input
XX
Q
(1 + R
C
Figure 12. Circuit for Increasing Output Voltage
C
2
I
/ R
I
Input
1
) + I
0.33µF
0.33µF
Figure 10. Fixed Output Regulator
Q
R
1
C
I
O
1
2
I
=
V
R
XX
0.33µF
I
LM78XX
1
Q
LM78XX
+ I
1
Q
2
Figure 11.
2
LM78XX
I
23
Q
C
2
3
C
O
3
O
0.1µF
0.1µF
C
3
O
R
1
0.1µF
V
V
R
XX
XX
L
Output
R1
R2
I
O
Output
Output
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