
MC78LXXA (LM78LXX, KA78LXXA) FIXED VOLTAGE REGULATOR (POSITIVE)
LM78L18 ELECTRICAL CHARACTERISTICS
(V
I
= 27V, I
O
= 40mA, 0
°
C
≤
T
J
≤
125
°
C, C
I
= 0.33
μ
F, C
O
= 0.1
μ
F, unless otherwise specified. (Note 1)
LM78L24 ELECTRICAL CHARACTERISTICS
(V
I
= 33V, I
O
= 40mA, 0
°
C
≤
T
J
≤
125
°
C, C
I
= 0.33
μ
F, C
O
= 0.1
μ
F, unless otherwise specified. (Note 1)
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.
Characteristic
Symbol
Test Conditions
Min
Typ
Max
Unit
Output Voltage
V
O
T
J
= 25
°
C
17.3
18
145
135
30
15
18.7
300
250
170
85
18.9
V
21V
≤
V
I
≤
33V
22V
≤
V
I
≤
33V
1mA
≤
I
O
≤
100mA
1mA
≤
I
O
≤
40mA
1mA
≤
I
O
≤
40mA
mV
mV
mV
mV
V
21V
≤
V
I
≤
33V
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
17.1
Output Voltage
V
O
1mA
≤
I
O
≤
70mA
17.1
18.9
V
Quiescent Current
Quiescent Current
Change
Output Noise Voltage
I
Q
I
Q
I
Q
V
N
2.2
6.0
1.5
0.1
mA
mA
mA
μ
V/V
O
with line
with load
150
Temperature Coefficient of V
O
I
O
= 5mA
-1.8
mV/
°
C
Ripple Rejection
Dropout Voltage
RR
V
D
f = 120Hz, 23V
≤
V
I
≤
33V, T
J
= 25
°
C
T
J
= 25
°
C
34
48
1.7
dB
V
Characteristic
Symbol
Test Conditions
Min
Typ
Max
Unit
Output Voltage
V
O
T
J
= 25
°
C
23
24
160
150
40
20
25
300
250
200
100
25.2
V
27V
≤
V
I
≤
38V
28V
≤
V
I
≤
38V
1mA
≤
I
O
≤
100mA
1mA
≤
I
O
≤
40mA
1mA
≤
I
O
≤
40mA
mV
mV
mV
mV
V
27V
≤
V
I
≤
38V
27V
≤
V
I
≤
V
MAX
(Note 2)
T
J
= 2
5
°
C
28V
≤
V
I
≤
38V
1mA
≤
I
O
≤
40mA
T
A
= 25
°
C, 10Hz
≤
f
≤
100KHz
22.8
Output Voltage
V
O
1mA
≤
I
O
≤
70mA
22.8
25.2
V
Quiescent Current
Quiescent Current
Change
Output Noise Voltage
I
Q
I
Q
I
Q
V
N
2.2
6.0
1.5
0.1
mA
mA
mA
μ
V/V
O
with line
with load
200
Temperature Coefficient of V
O
I
O
= 5mA
-2.0
mV/
°
C
Ripple Rejection
Dropout Voltage
RR
V
D
f = 120Hz, 28V
≤
V
I
≤
38V, T
J
= 25
°
C
T
J
= 25
°
C
34
45
1.7
dB
V
Line Regulation
Line Regulation
V
O
V
O
T
J
=25
°
C
T
J
=25
°
C
T
J
=25
°
C
T
J
=25
°
C
V
O
V
O
Load Regulation
Load Regulation
V
O
/
T
V
O
/
T