L78M00 SERIES
ELECTRICAL CHARACTERISTICS OF L78M20C (refer to the test circuits, T = 25°C, V = 29V,
J
I
I
= 350 mA, C = 0.33 µF, C = 0.1 µF unless otherwise specified).
I O
O
Symbol
Parameter
Test Conditions
Min.
19.2
19
Typ.
20
Max.
20.8
21
Unit
V
V
V
Output Voltage
Output Voltage
Line Regulation
O
O
I
= 5 to 350 mA V = 23 to 35 V
20
V
O
I
∆V
V = 23 to 35 V
I
I
= 200 mA
= 200 mA
100
50
mV
O
I
O
O
V = 24 to 35 V
I
∆V
Load Regulation
I
I
= 5 to 500 mA T = 25°C
400
200
6
mV
O
O
O
J
= 5 to 200 mA T = 25°C
J
I
Quiescent Current
mA
mA
d
∆I
Quiescent Current Change
I
I
I
= 5 to 350 mA
0.5
0.8
d
O
O
O
= 200 mA
= 5 mA
V = 23 to 35 V
I
∆V /∆T Output Voltage Drift
T = 0 to 125°C
-1.1
mV/°C
dB
O
J
SVR Supply Voltage Rejection
V = 24 to 34 V
f = 120Hz
53
I
I
= 300mA
O
eN
Output Noise Voltage
Dropout Voltage
B =10Hz to 100KHz
110
2
µV
V
V
d
I
Short Circuit Current
V = 35 V
240
mA
sc
I
ELECTRICAL CHARACTERISTICS OF L78M24C (refer to the test circuits, T = 25°C, V = 33V,
J
I
I
= 350 mA, C = 0.33 µF, C = 0.1 µF unless otherwise specified),
I O
O
Symbol
Parameter
Test Conditions
Min.
23
Typ.
24
Max.
25
Unit
V
V
V
Output Voltage
Output Voltage
Line Regulation
O
O
I
= 5 to 350 mA V = 27 to 38 V
22.8
24
25.2
100
50
V
O
I
∆V
V = 27 to 38 V
I
I
= 200 mA
= 200 mA
mV
O
I
O
O
V = 28 to 38 V
I
∆V
Load Regulation
I
I
= 5 to 500 mA T = 25°C
480
240
6
mV
O
O
O
J
= 5 to 200 mA T = 25°C
J
I
Quiescent Current
mA
mA
d
∆I
Quiescent Current Change
I
I
I
= 5 to 350 mA
0.5
0.8
d
O
O
O
= 200 mA
= 5 mA
V = 27 to 38 V
I
∆V /∆T Output Voltage Drift
T = 0 to 125°C
-1.2
mV/°C
dB
O
J
SVR Supply Voltage Rejection
V = 28 to 38 V
f = 120Hz
50
I
I
= 300mA
O
eN
Output Noise Voltage
Dropout Voltage
B =10Hz to 100KHz
170
2
µV
V
V
d
I
Short Circuit Current
V = 35 V
240
mA
sc
I
9/21
STMICROELECTRONICS [ ST ]
