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 24), 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) V
O
Vdc
21 Vdc ≤ V
in
≤ 33 Vdc - - - 17.1 18 18.9
22 Vdc ≤ V
in
≤ 33 Vdc 17.1 18 18.9 - - -
Line Regulation, (Note 25) Reg
line
mV
21 Vdc ≤ V
in
≤ 33 Vdc - 9.5 360 - 9.5 50
24 Vdc ≤ V
in
≤ 30 Vdc - 3.2 180 - 3.2 25
Load Regulation, (Note 25) Reg
load
- 2.0 360 - 2.0 55 mV
5.0 mA ≤ I
O
≤ 1.5 A
Quiescent Current I
B
- 3.5 8.0 - 3.5 6.5 mA
Quiescent Current Change
DI
B
mA
21 Vdc ≤ V
in
≤ 33 Vdc - - - - - 1.0
5.0 mA ≤ I
O
≤ 1.0 A - - 0.5 - - 0.5
Ripple Rejection RR - 57 - 53 57 - dB
22 Vdc ≤ V
in
≤ 33 Vdc, f = 120 Hz
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) V
n
- 10 - - 10 -
mV/V
O
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz r
O
- 1.3 - - 1.3 -
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
- -1.5 - - -1.5 - mV/°C
24.T
low
=0°C for MC78XXC, MC78XXAC,
= *40°C for NCV78XX, MC78XXB, MC78XXAB, and MC78XXAEB
25.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.