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 18), 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) V
O
11.5 12 12.5 Vdc
14.8 Vdc ≤ V
in
≤ 27 Vdc
Line Regulation (Note 19) Reg
line
mV
14.8 Vdc ≤ V
in
≤ 30 Vdc, I
O
= 500 mA - 3.8 18
16 Vdc ≤ V
in
≤ 22 Vdc, I
O
= 1.0 A - 2.2 20
14.5 Vdc ≤ V
in
≤ 27 Vdc, T
J
= 25°C - 6.0 120
Load Regulation (Note 19) Reg
load
mV
5.0 mA ≤ I
O
≤ 1.5 A, T
J
= 25°C - - 25
5.0 mA ≤ I
O
≤ 1.0 A - - 25
Quiescent Current I
B
- 3.4 6.0 mA
Quiescent Current Change
DI
B
mA
15 Vdc ≤ V
in
≤ 30 Vdc, I
O
= 500 mA - - 0.8
14.8 Vdc ≤ V
in
≤ 27 Vdc, T
J
= 25°C - - 0.8
5.0 mA ≤ I
O
≤ 1.0 A, T
J
= 25°C - - 0.5
Ripple Rejection RR 55 60 - dB
15 Vdc ≤ V
in
≤ 25 Vdc, f = 120 Hz, I
O
= 500 mA
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) V
n
- 10 -
mV/V
O
10 Hz ≤ f ≤ 100 kHz
Output Resistance (f = 1.0 kHz) r
O
- 1.1 -
mW
Short Circuit Current Limit (T
A
= 25°C) I
SC
- 0.2 - A
V
in
= 35 Vdc
Peak Output Current (T
J
= 25°C) I
max
- 2.2 - A
Average Temperature Coefficient of Output Voltage TCV
O
- -0.8 - mV/°C
18.T
low
=0°C for MC78XXC, MC78XXAC,
= *40°C for NCV78XX, MC78XXB, MC78XXAB, and MC78XXAEB
19.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.