MC78LXXA (LM78LXX, KA78LXXA)
FIXED VOLTAGE REGULATOR (POSITIVE)
LM78L18 ELECTRICAL CHARACTERISTICS
Characteristic
Output Voltage
Line Regulation
Load Regulation
Symbol
V
O
∆V
O
∆V
O
T
J
= 25
°C
T
J
=25
°C
T
J
=25
°C
(V
I
= 27V, I
O
= 40mA, 0
°C ≤
T
J
≤
125
°C,
C
I
= 0.33
µF,
C
O
= 0.1µF, unless otherwise specified. (Note 1)
Test Conditions
21V
≤
V
I
≤
33V
22V
≤
V
I
≤
33V
1mA
≤
I
O
≤100mA
1mA
≤
I
O
≤
40mA
1mA
≤
I
O
≤
40mA
1mA
≤
I
O
≤
70mA
17.1
17.1
2.2
Min
17.3
Typ
18
145
135
30
15
Max
18.7
300
250
170
85
18.9
18.9
6.0
1.5
0.1
150
-1.8
34
48
1.7
Unit
V
mV
mV
mV
mV
V
V
mA
mA
mA
µV/V
O
mV/
°C
dB
V
21V
≤
V
I
≤
33V
Output Voltage
Quiescent Current
Quiescent Current
Change
Output Noise Voltage
Temperature Coefficient of V
O
Ripple Rejection
Dropout Voltage
with line
with load
V
O
I
Q
∆I
Q
∆I
Q
V
N
21V
≤
V
I
≤
V
MAX
(Note 2)
T
J
= 25
°C
21V
≤
V
I
≤
33V
1mA
≤
I
O
≤
40mA
T
A
= 25
°C,
10Hz
≤
f
≤
100KHz
∆V
O
/∆T I
O
= 5mA
RR
V
D
f = 120Hz, 23V
≤
V
I
≤
33V, T
J
= 25
°C
T
J
= 25
°C
LM78L24 ELECTRICAL CHARACTERISTICS
(V
I
= 33V, I
O
= 40mA, 0
°C ≤
T
J
≤
125
°C,
C
I
= 0.33
µF,
C
O
= 0.1µF, unless otherwise specified. (Note 1)
Characteristic
Output Voltage
Line Regulation
Load Regulation
Output Voltage
Quiescent Current
Quiescent Current
with line
Change
with load
Output Noise Voltage
Temperature Coefficient of V
O
Ripple Rejection
Dropout Voltage
Symbol
V
O
∆V
O
∆V
O
V
O
I
Q
∆I
Q
∆I
Q
V
N
T
J
= 25
°C
T
J
=25
°C
T
J
=25
°C
27V
≤
V
I
≤
38V
28V
≤
V
I
≤
38V
1mA
≤
I
O
≤
100mA
1mA
≤
I
O
≤
40mA
1mA
≤
I
O
≤
40mA
Test Conditions
Min
23
Typ
24
160
150
40
20
Max
25
300
250
200
100
25.2
25.2
2.2
6.0
1.5
0.1
Unit
V
mV
mV
mV
mV
V
V
mA
mA
mA
µV/V
O
mV/
°C
dB
V
27V
≤
V
I
≤
38V
27V
≤
V
I
≤
V
MAX
1mA
≤
I
O
≤
70mA
(Note 2)
T
J
= 2 5°C
28V
≤
V
I
≤
38V
1mA
≤
I
O
≤
40mA
T
A
= 25
°C,
10Hz
≤
f
≤
100KHz
22.8
22.8
200
-2.0
34
45
1.7
∆V
O
/∆T I
O
= 5mA
RR
V
D
f = 120Hz, 28V
≤
V
I
≤
38V, T
J
= 25
°C
T
J
= 25
°C
Notes
1. The maximum steady state usable output current and input voltage are very dependent on the heat sinking and/or lead
length of the package. The data above represent pulse test conditions with junction temperature as indicated at the initiation
of tests.
2. Power dissipation
≤
0.75W.
BOCA [ BOCA SEMICONDUCTOR CORPORATION ]
