MC7800, MC7800A, NCV7805
http://onsemi.com
11
ELECTRICAL CHARACTERISTICS (V
in
= 19 V, I
O
= 500 mA, T
J
= T
low
to T
high
(Note 16), unless otherwise noted)
MC7812B 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) V
O
Vdc
14.5 Vdc ≤ V
in
≤ 27 Vdc − − − 11.4 12 12.6
15.5 Vdc ≤ V
in
≤ 27 Vdc 11.4 12 12.6 − − −
Line Regulation, T
J
= 25°C (Note 17) Reg
line
mV
14.5 Vdc ≤ V
in
≤ 30 Vdc − 7.5 240 − 3.8 24
16 Vdc ≤ V
in
≤ 22 Vdc − 2.2 120 − 0.3 24
14.8 Vdc ≤ V
in
≤ 27 Vdc, I
O
= 1.0 A − − − − − 48
Load Regulation, T
J
= 25°C (Note 17) Reg
load
− 1.6 240 − 8.1 60 mV
5.0 mA ≤ I
O
≤ 1.5 A
Quiescent Current I
B
− 3.4 8.0 − 3.4 6.5 mA
Quiescent Current Change I
B
mA
14.5 Vdc ≤ V
in
≤ 30 Vdc, I
O
= 1.0 A, T
J
= 25°C − − − − − 0.7
15 Vdc ≤ V
in
≤ 30 Vdc − − 1.0 − − 0.8
5.0 mA ≤ I
O
≤ 1.0 A − − 0.5 − − 0.5
Ripple Rejection RR − 60 − 55 60 − dB
15 Vdc ≤ V
in
≤ 25 Vdc, f = 120 Hz
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) V
n
− 10 − − 10 − V/V
O
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz r
O
− 1.1 − − 1.1 − m
Short Circuit Current Limit (T
A
= 25°C) I
SC
− 0.2 − − 0.2 − A
V
in
= 35 Vdc
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
16.T
low
=0°C for MC78XXAC, C T
high
= +125°C for MC78XXAC, C, NCV7805
= 40°C for MC78XXB, MC78XXAB, NCV7805
17.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.
