L78L00 SERIES
ELECTRICAL CHARACTERISTICS OF L78L18C (refer to the test circuits, T = 0 to 125°C, V = 27V,
J
I
I
= 40 mA, C = 0.33 µF, C = 0.1 µF unless otherwise specified).
I O
O
Symbol
Parameter
Test Conditions
Min.
16.6
16.2
16.2
Typ.
Max.
Unit
V
V
V
Output Voltage
Output Voltage
T = 25°C
18
19.4
19.8
19.8
320
270
170
85
O
O
J
I
I
= 1 to 40 mA
V = 22 to 33 V
V
O
O
I
= 1 to 70 mA
V = 27 V
I
∆V
∆V
Line Regulation
Load Regulation
Quiescent Current
V = 22 to 33 V
T = 25°C
mV
mV
O
O
I
J
V = 22 to 33 V
T = 25°C
J
I
I
I
= 1 to 100 mA
= 1 to 40 mA
T = 25°C
J
O
O
T = 25°C
J
I
T = 25°C
6.5
mA
mA
mA
d
J
T = 125°C
6
J
∆I
Quiescent Current Change
Output Noise Voltage
I
= 1 to 40 mA
0.2
d
O
V = 23 to 33 V
1.5
I
eN
B =10Hz to 100KHz
T = 25°C
120
38
µV
J
SVR Supply Voltage Rejection
V = 23 to 33 V
f = 120Hz
T = 25°C
32
dB
I
I
= 40 mA
O
J
V
Dropout Voltage
1.7
V
d
ELECTRICAL CHARACTERISTICS OF L78L20C (refer to the test circuits, T = 0 to 125°C, V = 29V,
J
I
I
= 40 mA, C = 0.33 µF, C = 0.1 µF unless otherwise specified)
I O
O
Symbol
Parameter
Test Conditions
Min.
18.4
18
Typ.
Max.
Unit
V
V
V
Output Voltage
Output Voltage
T = 25°C
20
21.6
22
O
O
J
I
I
= 1 to 40 mA
V = 24 to 33 V
V
O
O
I
= 1 to 70 mA
V = 29 V
18
22
I
∆V
∆V
Line Regulation
Load Regulation
Quiescent Current
V = 22.5 to 34 V
T = 25°C
330
280
180
90
mV
mV
O
O
I
J
V = 24 to 34 V
T = 25°C
J
I
I
I
= 1 to 100 mA
= 1 to 40 mA
T = 25°C
J
O
O
T = 25°C
J
I
T = 25°C
6.5
6
mA
mA
mA
d
J
T = 125°C
J
∆I
Quiescent Current Change
Output Noise Voltage
I
= 1 to 40 mA
0.2
1.5
d
O
V = 25 to 33 V
I
eN
B =10Hz to 100KHz
T = 25°C
120
38
µV
J
SVR Supply Voltage Rejection
V = 25 to 35 V
f = 120Hz
T = 25°C
31
dB
I
I
= 40 mA
O
J
V
Dropout Voltage
1.7
V
d
8/24
STMICROELECTRONICS [ ST ]
