Data Sheet

MC7800, MC7800A, MC7800AE, NCV7800
http://onsemi.com
18
ELECTRICAL CHARACTERISTICS (V
in
= 33 V, I
O
= 1.0 A, T
J
= T
low
to 125°C (Note 31), unless otherwise noted)
MC7824AC
Characteristic Symbol Min Typ Max Unit
Output Voltage (T
J
= 25°C) V
O
23.5 24 24.5 Vdc
Output Voltage (5.0 mA ≤ I
O
≤ 1.0 A, P
D
≤ 15 W)
27.3 Vdc ≤ V
in
≤ 38 Vdc
V
O
23.2 24 25.8
Vdc
Line Regulation (Note 32)
27 Vdc ≤ V
in
≤ 38 Vdc, I
O
= 500 mA
30 Vdc ≤ V
in
≤ 36 Vdc, I
O
= 1.0 A
30 Vdc ≤ V
in
≤ 36 Vdc, T
J
= 25°C
26.7 Vdc ≤ V
in
≤ 38 Vdc, I
O
= 1.0 A, T
J
= 25°C
Reg
line
−
−
−
−
11.5
3.8
3.8
10
25
28
12
25
mV
Load Regulation (Note 32)
5.0 mA ≤ I
O
≤ 1.5 A, T
J
= 25°C
5.0 mA ≤ I
O
≤ 1.0 A
250 mA ≤ I
O
≤ 750 mA
Reg
load
−
−
−
2.1
2.0
1.8
15
25
15
mV
Quiescent Current I
B
− 3.6 6.0 mA
Quiescent Current Change
27.3 Vdc ≤ V
in
≤ 38 Vdc, I
O
= 500 mA
27 Vdc ≤ V
in
≤ 38 Vdc, T
J
= 25°C
5.0 mA ≤ I
O
≤ 1.0 A
DI
B
−
−
−
−
−
−
0.8
0.8
0.5
mA
Ripple Rejection
28 Vdc ≤ V
in
≤ 38 Vdc, f = 120 Hz, I
O
= 500 mA
RR
45 54 −
dB
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)
10 Hz ≤ f ≤ 100 kHz
V
n
− 10 −
mV/V
O
Output Resistance (f = 1.0 kHz) r
O
− 1.4 −
mW
Short Circuit Current Limit (T
A
= 25°C)
V
in
= 35 Vdc
I
SC
− 0.2 −
A
Peak Output Current (T
J
= 25°C) I
max
− 2.2 − A
Average Temperature Coefficient of Output Voltage TCV
O
− −2.0 − mV/°C
31.T
low
=0°C for MC78XXC, MC78XXAC,
= *40°C for NCV78XX, MC78XXB, MC78XXAB, and MC78XXAEB
32.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.