* Load and line regulation are specified at constant junction temperature. Changes in V
o
due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
ELECTRICALCHARACTERISTICS FOR L7922C
(refer to the test circuits, T
j
= 0 to 150
o
C,
V
i
= -31V, I
o
= 500 mA, C
i
= 2.2 µF, C
o
=1µF unless otherwisespecified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage T
j
=25
o
C -21.1 -22 -22.9 V
V
o
Output Voltage I
o
=-5mAto-1A P
o
≤15 W
V
i
= -26to -37 V
-20.9 -22 -23.1 V
∆
V
o
* Line Regulation V
i
= -25to -37 V T
j
=25
o
C
V
i
= -28to -34 V T
j
=25
o
C
440
220
mV
mV
∆V
o
* Load Regulation I
o
= 5 to 1500 mA T
j
=25
o
C
I
o
= 250 to 750 mA T
j
=25
o
C
440
220
mV
mV
I
d
Quiescent Current T
j
=25
o
C3mA
∆I
d
Quiescent Current Change I
o
= 5 to 1000 mA 0.5 mA
∆I
d
Quiescent Current Change V
i
= -26to -37 V 1 mA
∆
V
o
∆
T
Output Voltage Drift I
o
= 5 mA -1.1 mV/
o
C
e
N
Output Noise Voltage B = 10Hz to 100KHz T
j
=25
o
C375
µ
V
SVR Supply Voltage Rejection ∆V
i
=10 V f= 120Hz 54 60 dB
V
d
Dropout Voltage I
o
=1A T
j
=25
o
C
∆V
O
=100mV
1.1 V
I
sc
Short Circuit Current 1.1 A
I
scp
Short Circuit Peak Current T
j
=25
o
C2.2A
ELECTRICALCHARACTERISTICS FOR L7924C (refer to the test circuits, T
j
= 0 to 150
o
C,
V
i
= -33V, I
o
= 500 mA, C
i
= 2.2 µF, C
o
=1µF unless otherwisespecified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
Output Voltage T
j
=25
o
C -23 -24 -25 V
V
o
Output Voltage I
o
=-5mAto-1A P
o
≤
15 W
V
i
= -27to -38 V
-22.8 -24 -25.2 V
∆V
o
* Line Regulation V
i
= -27to -38 V T
j
=25
o
C
V
i
= -30to -36 V T
j
=25
o
C
480
240
mV
mV
∆
V
o
* Load Regulation I
o
= 5 to 1500 mA T
j
=25
o
C
I
o
= 250 to 750 mA T
j
=25
o
C
480
240
mV
mV
I
d
Quiescent Current T
j
=25
o
C3mA
∆I
d
Quiescent Current Change I
o
= 5 to 1000 mA 0.5 mA
∆
I
d
Quiescent Current Change V
i
= -27to -38 V 1 mA
∆
V
o
∆
T
Output Voltage Drift I
o
= 5 mA -1 mV/
o
C
e
N
Output Noise Voltage B = 10Hz to 100KHz T
j
=25
o
C400µV
SVR Supply Voltage Rejection ∆V
i
=10 V f= 120Hz 54 60 dB
V
d
Dropout Voltage I
o
=1A T
j
=25
o
C
∆
V
O
=100mV
1.1 V
I
sc
Short Circuit Current 1.1 A
I
scp
Short Circuit Peak Current T
j
=25
o
C2.2A
L7900
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