KA78XX/KA78XXA
Electrical Characteristics (KA7812/KA7812R)
(Refer to test circuit ,0
°
C < T
J
< 125
°
C, I
O
= 500mA, V
I
=19V, C
I
= 0.33µF, C
O
=0.1µF, unless otherwise specified)
Parameter
Symbol
T
J
=+25
o
C
Output Voltage
V
O
5.0mA
≤
I
O
≤1.0A,
P
O
≤15W
V
I
= 14.5V to 27V
T
J
=+25
o
C
V
I
= 14.5V to 30V
V
I
= 16V to 22V
I
O
= 5mA to 1.5A
I
O
= 250mA to 750mA
Conditions
KA7812/KA7812R
Min. Typ.
11.5
11.4
-
-
-
-
-
-
-
-
-
55
-
-
-
-
12
12
10
3.0
11
5.0
5.1
0.1
0.5
-1
76
71
2
18
230
2.2
Max.
12.5
12.6
240
120
240
120
8.0
0.5
1.0
-
-
-
-
-
-
-
V
mV
mV
mA
mA
mV/
o
C
µV/Vo
dB
V
mΩ
mA
A
Unit
Line Regulation (Note1)
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Output Resistance
Short Circuit Current
Peak Current
Regline
Regload T
J
=+25
o
C
I
Q
∆I
Q
∆V
O
/∆T
V
N
RR
V
Drop
r
O
I
SC
I
PK
T
J
=+25
o
C
I
O
= 5mA to 1.0A
V
I
= 14.5V to 30V
I
O
= 5mA
f = 10Hz to 100KHz, T
A
=+25
o
C
f = 120Hz
V
I
= 15V to 25V
I
O
= 1A, T
J
=+25
o
C
f = 1KHz
V
I
= 35V, T
A
=+25
o
C
T
J
= +25
o
C
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
7
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
