L7800 SERIES
Table 21: Electrical Characteristics Of L7818C (refer to the test circuits, T = 0 to 125°C, V = 26V,
J
I
I = 500 mA, C = 0.33 µF, C = 0.1 µF unless otherwise specified).
O
I
O
Symbol
Parameter
Test Conditions
Min.
17.3
17.1
Typ.
18
Max.
18.7
18.9
Unit
V
V
V
Output Voltage
Output Voltage
T = 25°C
J
O
O
I
= 5 mA to 1 A
P
≤ 15W
O
18
V
O
V = 21 to 33 V
I
∆V (*) Line Regulation
V = 21 to 33 V
T = 25°C
360
180
360
180
8
mV
mV
O
I
J
V = 24 to 30 V
T = 25°C
J
I
∆V (*) Load Regulation
I
I
= 5 mA to 1.5 A
= 250 to 750 mA
T = 25°C
J
O
O
O
T = 25°C
J
I
Quiescent Current
Quiescent Current Change
T = 25°C
mA
mA
d
J
∆I
I
= 5 mA to 1 A
O
0.5
1
d
V = 21 to 33 V
I
∆V /∆T Output Voltage Drift
I
= 5 mA
O
-1
mV/°C
O
eN
SVR Supply Voltage Rejection
Output Noise Voltage
B =10Hz to 100KHz
V = 22 to 32 V
T = 25°C
110
µV/V
dB
V
J
O
f = 120Hz
53
I
V
Dropout Voltage
I
= 1 A
T = 25°C
2
d
O
O
J
R
Output Resistance
Short Circuit Current
f = 1 KHz
V = 35 V T = 25°C
22
mΩ
A
I
0.20
2.1
sc
I
J
I
Short Circuit Peak Current T = 25°C
A
scp
J
(*) Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
Table 22: Electrical Characteristics Of L7820C (refer to the test circuits, T = 0 to 125°C, V = 28V,
J
I
I = 500 mA, C = 0.33 µF, C = 0.1 µF unless otherwise specified).
O
I
O
Symbol
Parameter
Test Conditions
Min.
19.2
19
Typ.
20
Max.
20.8
21
Unit
V
V
V
Output Voltage
Output Voltage
T = 25°C
J
O
O
I
= 5 mA to 1 A
P
≤ 15W
O
20
V
O
V = 23 to 35 V
I
∆V (*) Line Regulation
V = 22.5 to 35 V
T = 25°C
400
200
400
200
8
mV
mV
O
I
J
V = 26 to 32 V
T = 25°C
J
I
∆V (*) Load Regulation
I
I
= 5 mA to 1.5 A
= 250 to 750 mA
T = 25°C
J
O
O
O
T = 25°C
J
I
Quiescent Current
Quiescent Current Change
T = 25°C
mA
mA
d
J
∆I
I
= 5 mA to 1 A
O
0.5
1
d
V = 23 to 35 V
I
∆V /∆T Output Voltage Drift
I
= 5 mA
O
-1
mV/°C
O
eN
Output Noise Voltage
B =10Hz to 100KHz
V = 24 to 35 V
T = 25°C
150
µV/V
dB
V
J
O
SVR Supply Voltage Rejection
f = 120Hz
52
I
V
Dropout Voltage
I
= 1 A
T = 25°C
2
d
O
J
R
Output Resistance
Short Circuit Current
f = 1 KHz
V = 35 V T = 25°C
24
mΩ
A
O
I
0.18
2.1
sc
I
J
I
Short Circuit Peak Current T = 25°C
A
scp
J
(*) Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
14/34
STMICROELECTRONICS [ ST ]
