Data Sheet

MC7800, MC7800A, MC7800AE, NCV7800
http://onsemi.com
17
ELECTRICAL CHARACTERISTICS (V
in
= 33 V, I
O
= 500 mA, T
J
= T
low
to 125°C (Note 29), unless otherwise noted)
MC7824B MC7824C
Characteristic Symbol Min Typ Max Min Typ Max Unit
Output Voltage (T
J
= 25°C) V
O
23 24 25 23 24 25 Vdc
Output Voltage (5.0 mA ≤ I
O
≤ 1.0 A, P
D
≤ 15 W)
27 Vdc ≤ V
in
≤ 38 Vdc
28 Vdc ≤ V
in
≤ 38 Vdc
V
O
−
22.8
−
24
−
25.2
22.8
−
24
−
25.2
−
Vdc
Line Regulation, (Note 30)
27 Vdc ≤ V
in
≤ 38 Vdc
30 Vdc ≤ V
in
≤ 36 Vdc
Reg
line
−
−
11.5
3.8
480
240
−
−
2.7
2.7
60
48
mV
Load Regulation, (Note 30)
5.0 mA ≤ I
O
≤ 1.5 A
Reg
load
− 2.1 480 − 4.4 65
mV
Quiescent Current I
B
− 3.6 8.0 − 3.6 6.5 mA
Quiescent Current Change
27 Vdc ≤ V
in
≤ 38 Vdc
5.0 mA ≤ I
O
≤ 1.0 A
DI
B
−
−
−
−
−
0.5
−
−
−
−
1.0
0.5
mA
Ripple Rejection
28 Vdc ≤ V
in
≤ 38 Vdc, f = 120 Hz
RR
− 54 − 50 54 −
dB
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)
10 Hz ≤ f ≤ 100 kHz
V
n
− 10 − − 10 −
mV/V
O
Output Resistance f = 1.0 kHz r
O
− 1.4 − − 1.4 −
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
− −2.0 − − −2.0 − mV/°C
29.T
low
=0°C for MC78XXC, MC78XXAC,
= *40°C for NCV78XX, MC78XXB, MC78XXAB, and MC78XXAEB
30.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.