Datasheet

MC7800, MC7800A, MC7800AE, NCV7800
http://onsemi.com
12
ELECTRICAL CHARACTERISTICS (V
in
= 19 V, I
O
= 1.0 A, T
J
= T
low
to 125°C (Note 19), unless otherwise noted)
MC7812AB/MC7812AC/NCV7812AB
Characteristic Symbol Min Typ Max Unit
Output Voltage (T
J
= 25°C) V
O
11.75 12 12.25 Vdc
Output Voltage (5.0 mA ≤ I
O
≤ 1.0 A, P
D
≤ 15 W)
14.8 Vdc ≤ V
in
≤ 27 Vdc
V
O
11.5 12 12.5
Vdc
Line Regulation (Note 20)
14.8 Vdc ≤ V
in
≤ 30 Vdc, I
O
= 500 mA
16 Vdc ≤ V
in
≤ 22 Vdc, I
O
= 1.0 A
14.5 Vdc ≤ V
in
≤ 27 Vdc, T
J
= 25°C
Reg
line
−
−
−
3.8
2.2
6.0
18
20
120
mV
Load Regulation (Note 20)
5.0 mA ≤ I
O
≤ 1.5 A, T
J
= 25°C
5.0 mA ≤ I
O
≤ 1.0 A
Reg
load
−
−
−
−
25
25
mV
Quiescent Current I
B
− 3.4 6.0 mA
Quiescent Current Change
15 Vdc ≤ V
in
≤ 30 Vdc, I
O
= 500 mA
14.8 Vdc ≤ V
in
≤ 27 Vdc, T
J
= 25°C
5.0 mA ≤ I
O
≤ 1.0 A, T
J
= 25°C
DI
B
−
−
−
−
−
−
0.8
0.8
0.5
mA
Ripple Rejection
15 Vdc ≤ V
in
≤ 25 Vdc, f = 120 Hz, I
O
= 500 mA
RR
55 60 −
dB
Dropout Voltage (I
O
= 1.0 A, T
J
= 25°C) V
I
− V
O
− 2.0 − Vdc
Output Noise Voltage (T
A
= 25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
− 10 −
mV/V
O
Output Resistance (f = 1.0 kHz) r
O
− 1.1 −
mW
Short Circuit Current Limit (T
A
= 25°C)
V
in
= 35 Vdc
I
SC
− 0.2 −
A
Peak Output Current (T
J
= 25°C) I
max
− 2.2 − A
Average Temperature Coefficient of Output Voltage TCV
O
− −0.8 − mV/°C
19.T
low
=0°C for MC78XXC, MC78XXAC,
= *40°C for NCV78XX, MC78XXB, MC78XXAB, and MC78XXAEB
20.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.