Electrical characteristics
Table 5.
Symbol
V
O
V
O
ΔV
O(1)
ΔV
O(1)
I
d
ΔI
d
ΔV
O
/ΔT
eN
SVR
V
d
I
sc
L79xxC
Electrical characteristics of L7908C
(refer to the test circuits, T
J
= 0 to 125 °C, V
I
= -14 V,
I
O
= 500 mA, C
I
= 2.2 µF, C
O
= 1 µF unless otherwise specified)
Parameter
Output voltage
Output voltage
T
J
= 25°C
I
O
= -5 mA to -1 A, P
O
≤
15 W
V
I
= -11.5 to -23 V
V
I
= -10.5 to -25 V, T
J
= 25°C
V
I
= -11 to -17 V, T
J
= 25°C
Load regulation
Quiescent current
Quiescent current change
Output voltage drift
Output noise voltage
Supply voltage rejection
Dropout voltage
Short circuit current
I
O
= 5 mA to 1.5 A, T
J
= 25°C
I
O
= 250 to 750 mA, T
J
= 25°C
T
J
= 25°C
I
O
= 5 mA to 1 A
V
I
= -11.5 to -25 V
I
O
= 5 mA
B = 10Hz to 100kHz, T
J
= 25°C
ΔV
I
= 10 V, f = 120Hz
I
O
= 1 A, T
J
= 25°C,
ΔV
O
= 100 mV
54
-0.6
175
60
1.1
1.5
Test conditions
Min.
-7.7
-7.6
Typ.
-8
-8
Max.
-8.3
-8.4
160
mV
80
160
mV
80
3
0.5
mA
1
mV/°C
µV
dB
V
A
mA
Unit
V
V
Line regulation
1. 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 6.
Symbol
V
O
V
O
ΔV
O(1)
ΔV
O(1)
I
d
ΔI
d
ΔV
O
/ΔT
eN
SVR
V
d
I
sc
Electrical characteristics of L7912C
(refer to the test circuits, T
J
= 0 to 125 °C, V
I
= -19 V,
I
O
= 500 mA, C
I
= 2.2 µF, C
O
= 1 µF unless otherwise specified)
Parameter
Output voltage
Output voltage
T
J
= 25°C
I
O
= -5 mA to -1 A, P
O
≤
15 W
V
I
= -15.5 to -27 V
V
I
= -14.5 to -30 V, T
J
= 25°C
V
I
= -16 to -22 V, T
J
= 25°C
Load regulation
Quiescent current
Quiescent current change
Output voltage drift
Output noise voltage
Supply voltage rejection
Dropout voltage
Short circuit current
I
O
= 5 mA to 1.5 A, T
J
= 25°C
I
O
= 250 to 750 mA, T
J
= 25°C
T
J
= 25°C
I
O
= 5 mA to 1 A
V
I
= -15 to -30 V
I
O
= 5 mA
B = 10Hz to 100kHz, T
J
= 25°C
ΔV
I
= 10 V, f = 120Hz
I
O
= 1 A, T
J
= 25°C,
ΔV
O
= 100 mV
54
-0.8
200
60
1.1
1.5
Test conditions
Min.
-11.5
-11.4
Typ.
-12
-12
Max.
-12.5
-12.6
240
mV
120
240
mV
120
3
0.5
mA
1
mV/°C
µV
dB
V
A
mA
Unit
V
V
Line regulation
1. 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.
8/21
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