Datasheet

MC7800, MC7800A, MC7800AE, NCV7800
http://onsemi.com
16
ELECTRICAL CHARACTERISTICS (V
in
= 27 V, I
O
= 1.0 A, T
J
= T
low
to 125°C (Note 26), unless otherwise noted)
Characteristic Symbol
MC7818AC
Unit
Min Typ Max
Output Voltage (T
J
= 25°C) V
O
17.64 18 18.36 Vdc
Output Voltage (5.0 mA ≤ I
O
≤ 1.0 A, P
D
≤ 15 W) V
O
17.3 18 18.7 Vdc
21 Vdc ≤ V
in
≤ 33 Vdc
Line Regulation (Note 27) Reg
line
mV
21 Vdc ≤ V
in
≤ 33 Vdc, I
O
= 500 mA - 9.5 22
24 Vdc ≤ V
in
≤ 30 Vdc, I
O
= 1.0 A - 3.2 25
24 Vdc ≤ V
in
≤ 30 Vdc, I
O
= 1.0 A, T
J
= 25°C - 3.2 10.5
20.6 Vdc ≤ V
in
≤ 33 Vdc, I
O
= 1.0 A, T
J
= 25°C - 8.0 22
Load Regulation (Note 27) Reg
load
mV
5.0 mA ≤ I
O
≤ 1.5 A, T
J
= 25°C - 2.0 25
5.0 mA ≤ I
O
≤ 1.0 A - 1.8 25
250 mA ≤ I
O
≤ 750 mA - 1.5 15
Quiescent Current I
B
- 3.5 6.0 mA
Quiescent Current Change
DI
B
mA
21 Vdc ≤ V
in
≤ 33 Vdc, I
O
= 500 mA - - 0.8
21.5 Vdc ≤ V
in
≤ 30 Vdc, T
J
= 25°C - - 0.8
5.0 mA ≤ I
O
≤ 1.0 A - - 0.5
Ripple Rejection RR 53 57 - dB
22 Vdc ≤ V
in
≤ 32 Vdc, f = 120 Hz, I
O
= 500 mA
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) V
n
- 10 -
mV/V
O
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz r
O
- 1.3 -
mW
Short Circuit Current Limit (T
A
= 25°C) I
SC
- 0.2 - A
V
in
= 35 Vdc
Peak Output Current (T
J
= 25°C) I
max
- 2.2 - A
Average Temperature Coefficient of Output Voltage TCV
O
- -1.5 - mV/°C
26.T
low
=0°C for MC78XXC, MC78XXAC,
= *40°C for NCV78XX, MC78XXB, MC78XXAB, and MC78XXAEB
27.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.