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I
Basic Regulator Circuit
I
Application Circuit
T
j
=25C
V
I
=–
27 to –38V, I
O
=5 to 200mA
V
I
=–27 to –38V, T
j
=25C
V
I
=–27 to –37V, T
j
=25C
I
O
=1 to 300mA, T
j
=25C
I
O
=5 to 200mA, T
j
=25C
T
j
=25C
V
I
=–27 to –38V, T
j
=25C
I
O
=5 to 200mA, T
j
=25C
f=10Hz to 100kHz
V
=–28 to –38V, I
O
=50mA,
f=120Hz
I
O
=200mA, T
j
=25C
V
I
=–35V, T
j
=25C
T
j
=25C
I
O
=5mA
Note 1) The specified condition T
=25C means that the test should be carried out with the test time so short (within 10ms) that the
drift in characteristic value due to the rise in chip junction temperature can be ignored.
Note 2) When not specified, V
I
=–33V, I
O
=100mA, C
I
=2
μ
F, C
O
=1
μ
F and T
j
=0 to 125C
I
Bias (IN)
I
Bias (L)
V
no
μ
V
V
DIF (min.)
I
O (Short)
I
O (Peak)
V
O
/Ta
mV/C
I
Electrical Characteristics (Ta=25C)
·
AN79N24 (–24V Type)
Parameter
Output voltage
Output voltage tolerance
V
O
V
O
–25
–25.2
V
V
–24
REG
IN
80
70
mV
mV
mV
mV
mA
mA
mA
20
15
REG
L
30
10
3
I
Bias
600
dB
0.5
0.1
300
150
5
54
–23
–22.8
RR
V
1.1
mA
mA
10
500
–1
Symbol
Condition
min
typ
max
Unit
Line regulation
Load regulation
Bias current
Input bias current fluctuation
Load bias current fluctuation
Output noise voltage
Ripple rejection ratio
Minimum input/output voltage difference
Output short circuit current
Peak output current
Output voltage temperature coefficient
C
I
is connected when the input line is long. 2
μ
F
C
O
improves the transient response. 1
μ
F
C
O
–V
O
C
I
–V
I
Input
Output
AN79N00
Common
–
+
–
+
2
μ
F
I
Q
I
O
AN79N00
R
V
O
′
–V
I
|I
O
| = V
Q
O
′
1
μ
F
–
+
–
+
Common
Input
Output