Samsung SR-608EV Service Manual page 60

2) REGULATOR(MC7812C)
ELECTRICAL CHARACTERISTICS MC7812
(Refer to test circuit, T < T
min
Characteristic
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
Output Voltage Drift
Output Noise Boltage
Ripple
Rejection
Dropout Voltage
Output Resistance
Short Circuit Current
Peak Current
* T < T < T
min i max
MC78XXI : T = -40°C, T
min
MC78XXC, T = 0°C, T
min max
* Load and line regulation are specified at constant junction temperature. Changes in V
account separately. Pulse testint with low duty is used.
60
< T V = 500mA, V = 19V, C
i max, i i
Symbol
V
o
∆V
Ti = 25°C
o
∆V
Ti = 25°C
o
I
d
∆I
d
∆V
/∆T
o
V
n
RR
V
D
R
O
I
SC
I
peak
= 125C
max
= 125°C
= 0.33µF, C = 1.0µFunless otherwise specified)
o
i
Test Conditions
Ti = 25°C
≤1.0A, P≤15W
5.0mA≤I
o
V = 14.5V to 27V
in
V = 15.5V to 27V
i
V = 14.5V to 30V
i
V = 16V to 22V
i
I = 5.0mA to 1.5V
o
I = 250mA to 750mA
o
T = 25°C
i
Io = 5mA to 1.0A
V = 14.5V to 30V
i
V = 15V to 30V
i
I = 5mA
o
f = 10Hz to 100KHz T = 25°C
i
fF = 120Hz
V = 15 to 25V
i
I = 1A, T = 25°C
o i
f = 1KHz
V = 35V, T = 25°C
i i
T = 25°C
i
MC7805C
Min Typ
11.5 12
11.4 12
10
3.0
12
4.0
5.1
-1
75
55
71
2
18
250
2.2
due to heating effects must be taken into
o
Samsung Electronics
Unit
Max
12.5
V
12.6
240
mV
120
240
mV
120
mA
8
0.5
mA
1.0
mV/°C
µ/V
dB
V
mΩ
mA
A