MC7800, MC7800A, LM340, LM340A Series
8
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (continued)
(V
in
= 19 V, I
O
= 500 mA, T
J
= T
low
to T
high
[Note 1], unless otherwise noted.)
MC7812C/LM340T–12
Characteristic Symbol Min Typ Max Unit
Output Noise Voltage (T
A
= 25°C) V
n
– 10 – µV/V
O
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz r
O
– 1.1 – mΩ
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
– –0.8 – mV/°C
ELECTRICAL CHARACTERISTICS (V
in
= 19 V, I
O
= 1.0 A, T
J
= T
low
to T
high
[Note 1], unless otherwise noted.)
MC7812AC/LM340AT–12
Characteristic Symbol Min Typ Max Unit
Output Voltage (T
J
= 25°C) V
O
11.75 12 12.25 Vdc
Output Voltage (5.0 mA ≤ I
O
≤ 1.0 A, P
D
≤ 15 W) V
O
11.5 12 12.5 Vdc
14.8 Vdc ≤ V
in
≤ 27 Vdc
Line Regulation (Note 2) Reg
line
mV
14.8 Vdc ≤ V
in
≤ 30 Vdc, I
O
= 500 mA – 3.8 18
16 Vdc ≤ V
in
≤ 22 Vdc, I
O
= 1.0 A – 2.2 20
14.5 Vdc ≤ V
in
≤ 27 Vdc, T
J
= 25°C – 6.0 120
Load Regulation (Note 2) Reg
load
mV
5.0 mA ≤ I
O
≤ 1.5 A, T
J
= 25°C – – 25
5.0 mA ≤ I
O
≤ 1.0 A – – 25
Quiescent Current I
B
– 3.4 6.0 mA
Quiescent Current Change ∆I
B
mA
15 Vdc ≤ V
in
≤ 30 Vdc, I
O
= 500 mA – – 0.8
14.8 Vdc ≤ V
in
≤ 27 Vdc, T
J
= 25°C – – 0.8
5.0 mA ≤ I
O
≤ 1.0 A, T
J
= 25°C – – 0.5
Ripple Rejection RR 55 60 – dB
15 Vdc ≤ V
in
≤ 25 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 – µV/V
O
10 Hz ≤ f ≤ 100 kHz
Output Resistance (f = 1.0 kHz) r
O
– 1.1 – mΩ
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
– –0.8 – mV/°C
NOTES: 1. T
low
= –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX T
high
= +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
2. 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.
