Data Sheet

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