L79xxC Electrical characteristics
Doc ID 2149 Rev 21 7/24
5 Electrical characteristics
Refer to the test circuits, T
J
= 0 to 125 °C, V
I
= -10 V, I
O
= 500 mA, C
I
= 2.2 µF, C
O
= 1 µF
unless otherwise specified.
Table 4. Electrical characteristics of L7905C
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
Output voltage T
J
= 25°C -4.8 -5 -5.2 V
V
O
Output voltage
I
O
= -5 mA to -1 A, P
O
≤ 15 W
V
I
= -8 to -20 V
-4.75 -5 -5.25 V
ΔV
O
(1)
Line regulation
V
I
= -7 to -25 V, T
J
= 25°C 100
mV
V
I
= -8 to -12 V, T
J
= 25°C 50
ΔV
O
(1)
Load regulation
I
O
= 5 mA to 1.5 A, T
J
= 25°C 100
mV
I
O
= 250 to 750 mA, T
J
= 25°C 50
I
d
Quiescent current T
J
= 25°C 3 mA
ΔI
d
Quiescent current change
I
O
= 5 mA to 1 A 0.5
mA
V
I
= -8 to -25 V 1.3
ΔV
O
/ΔT Output voltage drift I
O
= 5 mA -0.4 mV/°C
eN Output noise voltage B = 10Hz to 100kHz, T
J
= 25°C 100 µV
SVR Supply voltage rejection ΔV
I
= 10 V, f = 120Hz 54 60 dB
V
d
Dropout voltage I
O
= 1 A, T
J
= 25°C, ΔV
O
= 100 mV 1.4 V
I
sc
Short circuit current 2.1 A
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.
