Datasheet

MC7800, MC7800A, MC7800AE, NCV7800
http://onsemi.com
11
ELECTRICAL CHARACTERISTICS (V
in
= 19 V, I
O
= 500 mA, T
J
= T
low
to 125°C (Note 17), unless otherwise noted)
MC7812B/NCV7812B MC7812C
Characteristic Symbol Min Typ Max Min Typ Max Unit
Output Voltage (T
J
= 25°C) V
O
11.5 12 12.5 11.5 12 12.5 Vdc
Output Voltage (5.0 mA ≤ I
O
≤ 1.0 A, P
D
≤ 15 W)
14.5 Vdc ≤ V
in
≤ 27 Vdc
15.5 Vdc ≤ V
in
≤ 27 Vdc
V
O
−
11.4
−
12
−
12.6
11.4
−
12
−
12.6
−
Vdc
Line Regulation, T
J
= 25°C (Note 18)
14.5 Vdc ≤ V
in
≤ 30 Vdc
16 Vdc ≤ V
in
≤ 22 Vdc
14.8 Vdc ≤ V
in
≤ 27 Vdc, I
O
= 1.0 A
Reg
line
−
−
−
7.5
2.2
−
240
120
−
−
−
−
3.8
0.3
−
24
24
48
mV
Load Regulation, T
J
= 25°C (Note 18)
5.0 mA ≤ I
O
≤ 1.5 A
Reg
load
− 1.6 240 − 8.1 60
mV
Quiescent Current I
B
− 3.4 8.0 − 3.4 6.5 mA
Quiescent Current Change
14.5 Vdc ≤ V
in
≤ 30 Vdc, I
O
= 1.0 A, T
J
= 25°C
15 Vdc ≤ V
in
≤ 30 Vdc
5.0 mA ≤ I
O
≤ 1.0 A
DI
B
−
−
−
−
−
−
−
1.0
0.5
−
−
−
−
−
−
0.7
0.8
0.5
mA
Ripple Rejection
15 Vdc ≤ V
in
≤ 25 Vdc, f = 120 Hz
RR
− 60 − 55 60 −
dB
Dropout Voltage (I
O
= 1.0 A, T
J
= 25°C) V
I
− V
O
− 2.0 − − 2.0 − Vdc
Output Noise Voltage (T
A
= 25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
− 10 − − 10 −
mV/V
O
Output Resistance f = 1.0 kHz r
O
− 1.1 − − 1.1 −
mW
Short Circuit Current Limit (T
A
= 25°C)
V
in
= 35 Vdc
I
SC
− 0.2 − − 0.2 −
A
Peak Output Current (T
J
= 25°C) I
max
− 2.2 − − 2.2 − A
Average Temperature Coefficient of Output Voltage TCV
O
− −0.8 − − −0.8 − mV/°C
17.T
low
=0°C for MC78XXC, MC78XXAC,
= *40°C for NCV78XX, MC78XXB, MC78XXAB, and MC78XXAEB
18.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 cycle is used.