79LXX
Electrical Characteristics 79L18A
Electrical characteristics at specified virtual junction temperature, V
I
= -26V,I
O
= 40mA (unless otherwise noted)
Parameter
Output voltage**
I
O
= 1mA to 40mA,
V
I
= -20.5V to -33V
I
O
= 1mA to 70mA
V
I
= -20.5V to -33V
V
I
= -21V to -33V
V
I
= -23V to -33V, f= 120Hz
I
O
= 1mA to 100mA
I
O
= 1mA to 40mA
f= 10Hz to 100 KHz
Test conditions*
25°
C
0°to 125°
C
C
Min
-17.3
-17.1
-17.1
25°
C
0°to 125°
C
C
25°
C
25°
C
25°
C
25°
C
125°
C
Bias current change
*
V
I
= -21V to -33V
I
O
= 1mA to 40mA
0°to 125°
C
C
33
70
60
48
27
19
150
1.7
6.5
6
1.5
0.1
170
85
79L18A
Typ
-18
Units
Max
-18.7
-18.9
-18.9
325
275
dB
mV
µ
V
V
mA
mV
V
Input regulation
Ripple rejection
Output regulation
Output noise voltage
Dropout voltage
Bias current
Pulse testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal
effects must be taken into account separately. All characteristics are measured with a 0.33µ capacitor across the input and a 0.1 µ
F
F
capacitor across the output.
**
This specification applies only for dc power dissipation permitted by absolute maximum ratings.
Electrical Characteristics 79L24A
Electrical characteristics at specified virtual junction temperature, V
I
= -33V,I
O
= 40mA (unless otherwise noted)
Parameter
Output voltage**
I
O
= 1mA to 40mA, V
I
= -27V to -38V
I
O
= 1mA to 70mA
V
I
= -27V to -38V
V
I
= -28V to -38V
V
I
= -29V to -35V, f= 120Hz
I
O
= 1mA to 100mA
I
O
= 1mA to 40mA
f= 10Hz to 100 KHz
Test conditions*
25°
C
0°to 125°
C
C
25°
C
0°to 125°
C
C
25°
C
25°
C
25°
C
25°
C
125°
C
Bias current change
V
I
= -28V to -38V
I
O
= 1mA to 40mA
0°to 125°
C
C
31
Min
-23
-22.8
-22.8
79L24A
Typ
-24
Units
Max
-25
-25.2
-25.2
350
300
200
100
V
Input regulation
Ripple rejection
Output regulation
Output noise voltage
Dropout voltage
Bias current
90
75
47
40
25
200
1.7
mV
dB
mV
µ
V
V
6.5
6
1.5
0.1
mA
*
Pulse testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal
effects must be taken into account separatel y. All characteristics are measured with a 0.33µ capacitor across the input an d a 0.1 µ
F
F
capacitor across the output.
**
This specification applies only for dc power dissipation permitted by absolute maximum ratings.
BEIJING ESTEK ELECTRONICS CO.,LTD
5
ESTEK [ Estek Electronics Co. Ltd ]
