KA78XX/KA78XXA
Electrical Characteristics (KA7809A)
(Refer to the test circuits. 0oC < T < +125 oC, I =1A, V = 15V, C =0.33µF, C =0.1µF, unless otherwise speci-
J
o
I
I
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fied)
Parameter
Output Voltage
Symbol
Conditions
Min. Typ. Max.
Unit
T =+25°C
8.82 9.0
9.18
J
V
O
V
I
= 5mA to 1A, P ≤15W
O
V = 11.2V to 24V
O
8.65 9.0
9.35
I
V = 11.7V to 25V
I
-
6
90
I
= 500mA
O
Line Regulation (Note1)
Load Regulation (Note1)
V = 12.5V to 19V
-
-
-
4
6
2
45
90
45
I
Regline
mV
V = 11.5V to 24V
I
T =+25°C
J
V = 12.5V to 19V
I
T =+25°C
J
-
12
100
I
I
I
= 5mA to 1.0A
O
O
O
Regload
mV
= 5mA to 1.0A
-
-
-
-
-
-
-
12
100
50
= 250mA to 750mA
5
5.0
-
Quiescent Current
I
T =+25 °C
6.0
0.8
0.8
0.5
-
mA
mA
Q
J
V = 11.7V to 25V, T =+25 °C
I
J
Quiescent Current Change
∆I
V = 12V to 25V, I = 500mA
-
Q
I
O
O
O
I
I
= 5mA to 1.0A
= 5mA
-
Output Voltage Drift
Output Noise Voltage
∆V/∆T
-1.0
mV/ °C
f = 10Hz to 100KHz
V
N
-
-
10
62
-
-
µV/Vo
T =+25 °C
A
f = 120Hz, I = 500mA
O
Ripple Rejection
RR
dB
V = 12V to 22V
I
Dropout Voltage
Output Resistance
Short Circuit Current
Peak Current
V
I
= 1A, T =+25 °C
-
-
-
-
2.0
17
-
-
-
-
V
mΩ
mA
A
Drop
O
J
r
O
f = 1KHz
V = 35V, T =+25 °C
T =+25°C
I
250
2.2
SC
I
A
I
PK
J
Note:
1. Load and line regulation are specified at constant junction temperature. Change in V due to heating effects must be taken
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into account separately. Pulse testing with low duty is used.
14
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
