L78L00 SERIES
ELECTRICAL CHARACTERISTICS OF L78L20AB AND L78L20AC
(refer to the test circuits, V = 29V, I = 40 mA, C = 0.33 µF, C = 0.1 µF,
I
O
I
O
T = 0 to 125°C for L78L20AC, T = -40 to 125°C for L78L20AB, unless otherwise specified)
J
J
Symbol
Parameter
Output Voltage
Test Conditions
Min.
19.2
19
Typ.
Max.
20.8
21
Unit
V
V
V
T = 25°C
20
O
O
J
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
I
I
= 1 to 40 mA
V = 24 to 33 V
V
O
O
I
= 1 to 70 mA
V = 29 V
19
21
I
∆V
∆V
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
0.1
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
32
dB
I
I
= 40 mA
O
J
V
Dropout Voltage
1.7
V
d
ELECTRICAL CHARACTERISTICS OF L78L24AB AND L78L24AC
(refer to the test circuits, V = 27V, I = 40 mA, C = 0.33 µF, C = 0.1 µF,
I
O
I
O
T = 0 to 125°C for L78L24AC, T = -40 to 125°C for L78L24AB, unless otherwise specified)
J
J
Symbol
Parameter
Output Voltage
Test Conditions
Min.
23
Typ.
Max.
25
Unit
V
V
V
T = 25°C
24
O
O
J
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
I
I
= 1 to 40 mA
V = 27 to 38 V
22.8
22.8
25.2
25.2
350
300
200
100
6.5
V
O
O
I
= 1 to 70 mA
V = 33 V
I
∆V
∆V
V = 27 to 38 V
T = 25°C
mV
mV
O
O
I
J
V = 28 to 38 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
mA
mA
mA
d
J
T = 125°C
6
J
∆I
Quiescent Current Change
I
= 1 to 40 mA
0.1
d
O
V = 28 to 38 V
1.5
I
eN
Output Noise Voltage
B =10Hz to 100KHz
T = 25°C
200
37
µV
J
SVR Supply Voltage Rejection
V = 23 to 33 V
f = 120Hz
T = 25°C
31
dB
I
I
= 40 mA
O
J
V
Dropout Voltage
1.7
V
d
14/24
STMICROELECTRONICS [ ST ]
