Data Sheet

L7900 SERIES
6/18
Table 9: Electrical Characteristics Of L7918C (refer to the test circuits, T
J
= 0 to 125°C, V
I
= -27V,
I
O
= 500 mA, C
I
= 2.2 µF, C
O
= 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 10: Electrical Characteristics Of L7920C (refer to the test circuits, T
J
= 0 to 125°C, V
I
= -29V,
I
O
= 500 mA, C
I
= 2.2 µF, C
O
= 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
≤ 15 W
V
I
= -22 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 3 mA
∆I
d
Quiescent Current Change I
O
= 5 mA to 1 A 0.5 mA
V
I
= -22 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 300 µV
SVR Supply Voltage Rejection ∆V
I
= 10 V f = 120Hz 54 60 dB
V
d
Dropout Voltage I
O
= 1 A T
J
= 25°C ∆V
O
= 100
mV
1.1 V
I
sc
Short Circuit Current 1.1 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
≤ 15 W
V
I
= -24 to -35 V
-19 -20 -21 V
∆V
O
(*) Line Regulation V
I
= -23 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 3 mA
∆I
d
Quiescent Current Change I
O
= 5 mA to 1 A 0.5 mA
V
I
= -24 to -35 V 1
∆V
O
/∆T Output Voltage Drift I
O
= 5 mA -1.1 mV/°C
eN Output Noise Voltage B = 10Hz to 100KHz T
J
= 25°C 350 µV
SVR Supply Voltage Rejection ∆V
I
= 10 V f = 120Hz 54 60 dB
V
d
Dropout Voltage I
O
= 1 A T
J
= 25°C ∆V
O
= 100
mV
1.1 V
I
sc
Short Circuit Current 0.9 A