MC7800, MC7800A, NCV7805
http://onsemi.com
15
ELECTRICAL CHARACTERISTICS (V
in
= 27 V, I
O
= 500 mA, T
J
= T
low
to T
high
(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 I
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 − V/V
O
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz r
O
− 1.3 − − 1.3 − m
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 MC78XXAC, C T
high
= +125°C for MC78XXAC, C, NCV7805
= 40°C for MC78XXB, MC78XXAB, NCV7805
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.
