Datasheet

MC7800, MC7800A, MC7800AE, NCV7800
http://onsemi.com
15
ELECTRICAL CHARACTERISTICS (V
in
= 27 V, I
O
= 500 mA, T
J
= T
low
to 125°C (Note 25), unless otherwise noted)
MC7818B MC7818C
Characteristic Symbol Min Typ Max Min Typ Max Unit
Output Voltage (T
J
= 25°C) V
O
17.3 18 18.7 17.3 18 18.7 Vdc
Output Voltage (5.0 mA ≤ I
O
≤ 1.0 A, P
D
≤ 15 W)
21 Vdc ≤ V
in
≤ 33 Vdc
22 Vdc ≤ V
in
≤ 33 Vdc
V
O
−
17.1
−
18
−
18.9
17.1
−
18
−
18.9
−
Vdc
Line Regulation, (Note 26)
21 Vdc ≤ V
in
≤ 33 Vdc
24 Vdc ≤ V
in
≤ 30 Vdc
Reg
line
−
−
9.5
3.2
360
180
−
−
9.5
3.2
50
25
mV
Load Regulation, (Note 26)
5.0 mA ≤ I
O
≤ 1.5 A
Reg
load
− 2.0 360 − 2.0 55
mV
Quiescent Current I
B
− 3.5 8.0 − 3.5 6.5 mA
Quiescent Current Change
21 Vdc ≤ V
in
≤ 33 Vdc
5.0 mA ≤ I
O
≤ 1.0 A
DI
B
−
−
−
−
−
0.5
−
−
−
−
1.0
0.5
mA
Ripple Rejection
22 Vdc ≤ V
in
≤ 33 Vdc, f = 120 Hz
RR
− 57 − 53 57 −
dB
Dropout Voltage (I
O
= 1.0 A, T
J
= 25°C) V
iI
− 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
− 1.3 − − 1.3 −
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
− −1.5 − − −1.5 − mV/°C
25.T
low
=0°C for MC78XXC, MC78XXAC,
= *40°C for NCV78XX, MC78XXB, MC78XXAB, and MC78XXAEB
26.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.