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 16), 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) 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
DI
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 -
mV/V
O
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz r
O
- 1.1 - - 1.1 -
mW
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 MC78XXC, MC78XXAC,
= *40°C for NCV78XX, MC78XXB, MC78XXAB, and MC78XXAEB
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.