IL79LXX
1
T
HREE
-T
ERMINAL
L
OW
C
URRENT
P
OSITIVE
V
OLTAGE
R
EGULATORS
The IL79LXX, A Series negative voltage regulators are inexpensive,
easy-to-use devices suitable for numerous applications requiring up to
100 mA. This series features thermal shutdown and current limiting,
making them remarkably rugged. In most applications, no external
components are required for operation.
The IL79LXX devices are useful for on-card regulation or any other
application where a regulated negative voltage at a modest current
level is needed. These regulators offer substantial advantage over the
common resistor/zener diode approach
.
TO-226AA /
TO-92
Pin 1. Output
2.Ground
3.Input
F
EATURES
No External Components Required
Internal Short Circuit Current Limiting
Internal Thermal Overload Protection
Low Cost
Complementary Positive Regulators
Offered (IL78LXX Series)
Available in Either 5% (AC) or10% (C) Selections
o
**
0.1
F
in
*
0.33
F
Vout
Vin
I L79LXX
Standard application
A common ground is required between the input
and the output voltages. The input voltage must
remaintypically 2.0 V above the output voltage even
during the low point on the input ripple voltage.
*C in is required if regulator is located an
*
appreciable distance from power supply filter.
**C O is not needed for stability; however, it does
*
improve transient response.
A
BSOLUTE MAXIMUM RATINGS
Rating Symbol
Value
Unit
Input Voltage (-5.0 V)
(-12, -15, -18V)
(-24V)
V
l
-30
-35
-40
Vdc
Storage Temperature Range
Tstg
-65 to +150
C
Operating Junction Temperature Range
T
J
+150
C
IL79LXX
2
IL79L05
ELECTRICAL CHARACTERISTICS
(V
l
=-10 V, Io= 40 mA, C
l
= 0.33
F, Co
= 0.1
F, -40C <
T
J
< +125C unless otherwise noted.)
Characteristics Symbol
Min
Typ
Max
Unit
Output Voltage (T
J
=+25
C)
V
O
-4.8
-5.0
-5.2
Vdc
Line Regulation
(T
J
= +25
C)
-7.0 Vdc
Vi 20 Vdc
-8.0 Vdc
Vi 20 Vdc
Reg
line
-
-
-
-
150
100
mV
Load Regulation
T
J
= +25
C, 1.0 mA I
O
100 mA) 1.0 mA Io
40 mA)
Peg
load
-
-
-
-
60
30
mV
Output Voltage
-7.0 Vdc
Vi -20Vdc,
(Vi=-10 V, 1.0 mA
Io70 mA)
V
O
-4.75
-4.75
-
-
-5.25
-5.25
Vdc
Input Bias Current
(T
J
= +25
C)
(T
J
=+125
C)
I
IB
-
-
-
6.0
5.5
mA
Input Bias Current Change
-8.8 Vdc
Vi -20 Vdc)
1.0 mA
Io 40 mA
I
IB
-
-
-
-
1.5
0.1
mA
Output Noise Voltage
(T
A
=+25
C, 10 Hzf100 kHz)
Vn -
40
-
V
Ripple Rejection
(-8.0 Vdc
Vi -18 V,
f= 120 Hz, T
J
=
+25
C)
RR 41
49
-
dB
Dropout Voltage (I
O
=40
mA,
T
J
= +25
C)
Vi-Vo -
1.7
-
Vdc
IL79L12
ELECTRICAL CHARACTERISTICS
(Vi =-19 V, Io =40 mA, Ci = 0.33
F, Co = 0.1 F, -40C < T
J
< +125C, unless otherwise noted.)
Characteristics Symbol
Min
Typ
Max
Unit
Output Voltage (T
J
= +25
C)
Vo -11.1
-12
-12.9
Vdc
Line Regulation
(T
J
= +25
C)
-14.5Vdc
Vi 27Vdc
-16 Vdc
Vi 27 Vdc
Reg
line
-
-
-
-
250
200
mV
Load Regulation
T
J
=
+25
C,
1.0 mA
Io
100 mA
1.0
mA
Io
40 mA
Peg
load
-
-
-
-
100
50
mV
Output Voltage
-14.5Vdc
Vi -27Vdc, 1.0mAIo 40mA) Vi = -
19V, 1.0mA
Io 70mA)
Vo
-10.8 --
10.8
-
-
-13.2
-13.2
Vdc
Input Bias Current
(T
J
= +25
C)
(T
J
=
+125
C)
I
IB
-
-
-
-
6.5
6.0
mA
Input Bias Current Change
-16Vdc
Vi -27Vdc
1.0 mA
Io 40 mA
I
IB
-
-
-
-
1.5
0.2
mA
Output Noise Voltage
(T
A
= +25
C, 10Hz f 100 kHz)
Vn -
80
-
V
Ripple Rejection
-15V
Vi -25V, f= 120 Hz, T
J
=+25
C)
RR 36
42
-
dB
Dropout Voltage
(I
O
=
40
mA,
T
J
= +25
C)
Vi-Vo "
1.7
-
Vdc
IL79LXX
3
IL79L15
ELECTRICAL CHARACTERISTICS
(Vi = -23 V, Io
= 40 mA, Ci = 0.33
F, Co= 0.1 F, -40C < T
J
< +125C), unless otherwise noted.)
Characteristics
Symbol Min Typ Max Unit
Output Voltage (T
J
= +25
C)
Vo -13.8
-15
-16.2
Vdc
Line Regulation
(T
J
= +25
C, Io
= 40mA)
-30Vdc
Vi -17.5Vdc
-30Vdc
Vi -20Vdc
Reg
line
-
-
-
-
300
250
mV
Load Regulation
(T
J
=
+25
C,
1.0
mA
Io
100 mA)
(T
J
= +25
C, 1.0 mA Io < 40 mA)
Peg
load
-
-
-
-
150
75
mV
Output Voltage
(17.5Vdc
Vi 30Vdc, 1.0 mAIo 40 mA) (Vi =
23V, 1.0mA
Io 70 mA)
Vo
-13.5
-13.5
-
-
-16.5
-16.5
Vdc
Input Bias Current
(T
J
= +25
C)
(T
J
=
+125
C)
I
IB
-
-
-
-
6.5
6.0
mA
Input Bias Current Change
(20Vdc
Vi 30Vdc)
(1.0mA
Io 40 mA)
I
IB
-
-
-
-
1.5
0.2
mA
Output Noise Voltage
(T
A
= +25
C, 10Hz f 100 kHz)
Vn -
90
-
nV
Ripple Rejection (I
O
= 40 mA, f =120 Hz, 18.5V
Vi
28.5V, T
J
= +25
C)
RR 33
39
-
dB
Dropout Voltage (T
J
= +25
C)
Vi-Vo
- 1.7
- Vdc
IL79L18
ELECTRICAL CHARACTERISTICS
(Vi = 27 V, Io
= 40 mA, Ci = 0.33
F, Co = 0.1 F, 40C < T
J
< +125C, unless otherwise noted.)
Characteristics
Symbol
Min Typ Max Unit
Output Voltage (T
J
= +25
C)
V
O
-16.6
-18
-19.4
Vdc
Line Regulation
(T
J
= +25
C, Io= 40 mA)
-33 Vdc
Vi -20.7Vdc
-33 Vdc
Vi -22 Vdc
Reg
line
-
-
-
-
325
275
mV
Load Regulation
(T
J
= +25
C, 1.0 mA Io 100 mA)
(T
J
= +25
C, 1.0 mA Io 40 mA)
Peg
load
-
-
-
-
170
85
mV
Output Voltage
(-33Vdc
Vi-21.4Vdc, 1.0 mA Io 40 mA)
(Vi = -27 V, 1.0mA
Io 70 mA)
Vo
-16.2
-16.2
-
-
-19.8
-19.8
Vdc
Input Bias Current
(T
J
=
+25
C)
(T
J
= +125
C)
I
IB
-
-
-
-
6.5
6.0
mA
Input Bias Current Change
(-33Vdc
Vi -22Vdc)
(1.0mA
Io
40 mA)
I
IB
-
-
-
-
1.5
0.2
mA
Output Noise Voltage
(T
=+25
C,10Hz Io 100kHz)
Vn -
150
-
nV
Ripple Rejection
(f = 120 Hz, -33 V
Vi -23 V, T
J
= +25
C)
RR 32
46
-
dB
Dropout Voltage (T
J
= +25
C)
Vi-Vo
- 1.7
- Vdc
IL79LXX
4
IL79L24
ELECTRICAL CHARACTERISTICS
(Vi = 33 V, Io
= 40 mA, Ci = 0.33
F. Co
= 0.1
F,
0C < T
J
< +125C, unless otherwise noted.)
Characteristics Symbol
Min
Typ
Max
Unit
Output Voltage (T
J
= +25
C)
V
O
-22.1
-24
-25.9
Vdc
Line Regulation
(T
J
= +25
C, Io
= 40 mA)
38 Vdc
Vi 27.5 Vdc
38 Vdc
Vi 28 Vdc
Reg
line
-
-
35
30
350
300
mV
Load Regulation
(T
J
= +25
C, 1.0 mA Io 100 mA)
(T
J
= +25
C, 1.0 mA Io 40 mA)
Reg
load
-
-
40
20
200
100
mV
Output Voltage
-38Vdc
Vi -28Vdc, 1.0 mA Io 40 mA
Vi= -33Vdc, 1.0 mA
Io 70 mA
V
O
-21.6
-21.6
-
-
-26.4
-26.4
Vdc
Input Bias Current
(T
J
= +25
C)
(T
J
= +125
C)
I
IB
-
-
-
-
6.5
6.0
mA
Input Bias Current Change
(-38 Vdc
Vi -28 Vdc)
(1.0 mA
Io 40 mA)
I
IB
-
-
-
-
1.5
0.2
rnA
Output Noise Voltage
(T
= +25
C, 10Hz f 100 kHz)
Vn -
200
-
nV
Ripple Rejection (I
O
= 40 mA, f= 120 Hz, -
35V
Vi -29V, T
J
= +25
C)
RR 30
43
-
dB
Dropout Voltage (T
J
= +25
C)
Vi-Vo
- 1.7
- Vdc
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