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L79L
Negative voltage regulators
Datasheet - production data
Description
The L79L series of three-terminal negative
regulators employ internal current limiting and
thermal shutdown, making them essentially
indestructible. If adequate heat-sink is provided,
they can deliver up to 100 mA output current.They
are intended as fixed voltage regulators in a wide
range of applications including local or on-card
regulation for elimination of noise and distribution
problems associated with single-point regulation.
In addition, they can be used with power pass
elements to make high-current voltage regulators.
The L79L series used as Zener diode/resistor
combination replacement, offers an effective
output impedance improvement of typically two
orders of magnitude, along with lower quiescent
current and lower noise.
Features
• Output current up to 100 mA
• Output voltages of -5; -8;-12; -15 V
• Thermal overload protection
• Short-circuit protection
• No external components are required
• Available in ±5% (AC) or ± 10% (C) selection
April 2014
This is information on a product in full production.
DocID2511 Rev 17
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Contents
L79L
Contents
1
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1
4.2
SO-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.3
5
TO-92 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SOT-89 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1
Tape and reel for TO-92 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2
Tape and reel for TO-92 Ammopak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3
Tape and reel for SOT-89 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.4
Tape and reel for SO-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6
Order codes
7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2/26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
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L79L
1
Diagram
Diagram
Figure 1. Schematic diagram
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Pin configuration
2
L79L
Pin configuration
Figure 2. Pin connection (top view, bottom view for TO-92)
PIN 1 = GND
PIN 2 = VIN
PIN 3 = VOUT
SO-8
SOT-89
Figure 3. Test circuit
4/26
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TO-92
L79L
3
Maximum ratings
Maximum ratings
Table 1. Absolute maximum ratings
Symbol
Parameter
Value
DC input voltage
IO
VO = -5 to -9 V
-30
VO = -12 to -15 V
VI
-35
Output current
PD
Unit
V
100
Power dissipation
mA
Internally limited
TSTG
Storage temperature range
TOP
Operating junction temperature range
-40 to 150
For L79LXXAC
mW
°C
0 to 125
For L79LXXAB
(1)
-40 to 125
°C
1. Our SO-8 package used for Voltage Regulators is modified internally to have pins 2, 3, 6 and 7 electrically communed to
the die attach flag. This particular frame decreases the total thermal resistance of the package and increases its ability to
dissipate power when an appropriate area of copper on the printed circuit board is available for heat-sinking. The external
dimensions are the same as for the standard SO-8.
Table 2. Thermal data
Symbol
RthJC
RthJA
1.
Parameter
SO-8
Thermal resistance junction-case. (Max)
Thermal resistance junction-ambient. (Max)
TO-92
55
(1)
200
Unit
15
20
SOT-89
°C/W
115
°C/W
Considering 6 cm2 of copper Board heat-sink.
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Electrical characteristics
4
L79L
Electrical characteristics
Refer to the test circuits, VI = - 10 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = 0 to 125 °C
for L79L05AC, TJ = -40 to 125 °C for L79L05AB, unless otherwise specified.
Table 3. Electrical characteristics of L79L05AC and L79L05AB
Symbol
Parameter
Output voltage
VO
Output voltage
DVO
Line regulation
DVO
Load regulation
Id
Min.
Typ.
Max.
Unit
TJ = 25°C
-4.8
-5
-5.2
V
IO = 1 to 40 mA, VI = -7 to -20 V
-4.75
-5.25
IO = 1 to 70 mA, VI = -10 V
VO
Test conditions
-4.75
-5.25
V
150
VI = -8 to -20 V, TJ = 25°C
100
IO = 1 to 100 mA, TJ = 25°C
60
IO = 1 to 40 mA, TJ = 25°C
30
TJ = 25°C
6
mA
TJ = 125°C
5.5
mA
IO = 1 to 40 mA
0.1
VI = -8 to -20 V
Quiescent current
VI = -7 to -20 V, TJ = 25°C
1.5
DId
Quiescent current change
eN
Output noise voltage
VI = -8 to -18 V, f = 120 Hz IO = 40 mA,
TJ = 25°C
mV
B = 10 Hz to 100 kHz, TJ = 25°C
Supply voltage rejection
mV
SVR
Vd
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mA
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41
µV
49
dB
1.7
Dropout voltage
40
V
L79L
Electrical characteristics
Refer to the test circuits, VI = - 14 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = 0 to 125 °C
for L79L08AC TJ = -40 to 125 °C for L79L08AB, unless otherwise specified.
Table 4. Electrical characteristics of L79L08AC and L79L08AB
Symbol
Parameter
Output voltage
VO
Output voltage
DVO
Line regulation
DVO
Load regulation
Id
Min.
Typ.
Max.
Unit
TJ = 25°C
-7.68
-8
-8.32
V
IO = 1 to 40 mA, VI = -10.5 to -23 V
-7.6
-8.4
IO = 1 to 70 mA, VI = -14 V
VO
Test conditions
-7.6
-8.4
V
175
VI = -11 to -23 V, TJ = 25°C
125
IO = 1 to 100 mA, TJ = 25°C
80
IO = 1 to 40 mA, TJ = 25°C
40
TJ = 25°C
6
mA
TJ = 125°C
5.5
mA
IO = 1 to 40 mA
0.1
VI = -11 to -23 V
Quiescent current
VI = -10.5 to -23 V, TJ = 25°C
1.5
DId
Quiescent current change
eN
Output noise voltage
VI = -12 to -23V, f = 120 Hz, IO = 40 mA,
TJ = 25°C
mV
B = 10 Hz to 100 kHz, TJ = 25°C
Supply voltage rejection
mV
SVR
Vd
mA
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µV
45
dB
1.7
Dropout voltage
60
V
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Electrical characteristics
L79L
Refer to the test circuits, VI = - 19 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = 0 to 125 °C
for L79L12AC, TJ = -40 to 125 °C for L79L12AB, unless otherwise specified.
Table 5. Electrical characteristics of L79L12AC and L79L12AB
Symbol
Parameter
Output voltage
VO
Output voltage
DVO
Line regulation
DVO
Load regulation
Id
Min.
Typ.
Max.
Unit
TJ = 25°C
-11.5
-12
-12.5
V
IO = 1 to 40 mA, VI = -14.5 to -27 V
-11.4
-12.6
IO = 1 to 70 mA, VI = -19 V
VO
Test conditions
-11.4
-12.6
V
250
VI = -16 to -27 V, TJ = 25°C
200
IO = 1 to 100 mA, TJ = 25°C
100
IO = 1 to 40 mA, TJ = 25°C
50
TJ = 25°C
6.5
mA
TJ = 125°C
Quiescent current
VI = -14.5 to -27 V, TJ = 25°C
6
mA
mV
mV
IO = 1 to 40 mA
0.1
VI = -16 to -27 V
1.5
DId
Quiescent current change
eN
Output noise voltage
B = 10 Hz to 100 kHz, TJ = 25°C
Supply voltage rejection
VI = -15 to -25V, f = 120 Hz IO = 40 mA,
TJ = 25°C
SVR
Vd
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mA
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µV
42
dB
1.7
Dropout voltage
80
V
L79L
Electrical characteristics
Refer to the test circuits, VI = - 23 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, TJ = 0 to 125 °C
for L79L15AC, TJ = -40 to 125 °C for L79L15AB, unless otherwise specified.
Table 6. Electrical characteristics of L79L15AC and L79L15AB
Symbol
Parameter
Output voltage
VO
Output voltage
DVO
Line regulation
DVO
Load regulation
Id
Min.
Typ.
Max.
Unit
TJ = 25°C
-14.4
-15
-15.6
V
IO = 1 to 40 mA, VI = -17.5 to -30 V
-14.25
-15.75
IO = 1 to 70 mA, VI = -23 V
VO
Test conditions
-14.25
-15.75
V
300
VI = -20 to -30 V, TJ = 25°C
250
IO = 1 to 100 mA, TJ = 25°C
150
IO = 1 to 40 mA, TJ = 25°C
75
TJ = 25°C
6.5
mA
TJ = 125°C
Quiescent current
VI = -17.5 to -30 V, TJ = 25°C
6
mA
mV
mV
IO = 1 to 40 mA
0.1
VI = -20 to -30 V
1.5
DId
Quiescent current change
eN
Output noise voltage
B = 10 Hz to 100 kHz, TJ = 25°C
Supply voltage rejection
VI = -18.5 to -28.5.V, f = 120Hz
IO = 40 mA, TJ = 25°C
SVR
Vd
mA
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µV
39
dB
1.7
Dropout voltage
90
V
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Electrical characteristics
4.1
L79L
TO-92
Figure 4. TO-92 drawing
0102782 D
10/26
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L79L
Electrical characteristics
Table 7. TO-92 mechanical data
mm
Dim.
Min.
Typ.
Max.
A
4.32
4.95
b
0.36
0.51
D
4.45
4.95
E
3.30
3.94
e
2.41
2.67
e1
1.14
1.40
L
12.70
15.49
R
2.16
2.41
S1
0.92
1.52
W
0.41
0.56
V
4.2
5°
SO-8
Figure 5. SO-8 drawing
0016023_G_FU
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Electrical characteristics
L79L
Table 8. SO-8 mechanical data
mm
Dim.
Min.
Typ.
A
Max.
1.75
A1
0.10
0.25
A2
1.25
b
0.31
0.51
b1
0.28
0.48
c
0.10
0.25
c1
0.10
0.23
D
4.80
4.90
5.00
E
5.80
6.00
6.20
E1
3.80
3.90
4.00
e
1.27
h
0.25
0.50
L
0.40
1.27
L1
1.04
L2
0.25
k
0°
8°
ccc
12/26
0.10
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L79L
Electrical characteristics
Figure 6. SO-8 footprint
Footprint_0016023_G_FU
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Electrical characteristics
4.3
L79L
SOT-89
Figure 7. SOT-89 drawing
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L79L
Electrical characteristics
Table 9. SOT-89 mechanical data
mm
Dim.
Min.
Typ.
Max.
A
1.40
1.60
B
0.44
0.56
B1
0.36
0.48
C
0.35
0.44
C1
0.35
0.44
D
4.40
4.60
D1
1.62
1.83
D3
0.90
E
2.29
2.60
e
1.42
1.57
e1
2.92
3.07
H
3.94
4.25
H1
2.70
3.10
K
1°
8°
L
0.89
1.20
R
0.25
b
90°
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Electrical characteristics
L79L
Figure 8. SOT-89 footprint
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L79L
Packaging mechanical data
5
Packaging mechanical data
5.1
Tape and reel for TO-92
Figure 9. TO-92 tape and reel dimensions
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Packaging mechanical data
L79L
Table 10. TO-92 tape and reel mechanical data
mm
Dim.
Min.
Typ.
Max.
A1
4.80
T
3.80
T1
1.60
T2
2.30
d
0.45
0.47
0.48
P0
12.50
12.70
12.90
P2
5.65
6.35
7.05
F1, F2
2.40
2.50
2.94
F3
4.98
5.08
5.48
delta H
-2.00
W
17.50
18.00
19.00
W0
5.5
6.00
6.5
W1
8.50
9.00
9.25
2.00
W2
0.50
H
18.50
21
H3
0.5
1
2
H0
15.50
16.00
18.8
25.0
27.0
4.00
4.20
H1
D0
3.80
t
0.90
L
11.00
l1
delta P
-1.00
Ø1
352
355
358
Ø2
28
30
32
u
18/26
3.00
44
47
50
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1.00
L79L
5.2
Packaging mechanical data
Tape and reel for TO-92 Ammopak
Figure 10. TO-92 Ammopak
T
A1
T2
H1
T1
delta H
H
H3
H0
d
L
W2
l1
W
W0
W1
F1 F2
F3
P2
D0
t
P0
0050910S_Rev_U
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Packaging mechanical data
L79L
Table 11. TO-92 Ammopak mechanical data
mm
Dim.
Min.
Typ.
Max.
A1
4.80
T
3.80
T1
1.60
T2
2.30
d
0.45
0.47
0.48
P0
12.50
12.70
12.90
P2
5.65
6.35
7.05
F1, F2
2.40
2.50
2.94
F3
4.98
5.08
5.48
delta H
-2.00
W
17.50
18.00
19.00
W0
5.5
6.00
6.5
W1
8.50
9.00
9.25
2.00
W2
0.50
H
18.50
21
H3
0.5
1
2
H0
15.50
16.00
18.8
25.0
27.0
4.00
4.20
H1
D0
3.80
t
0.90
L
11.00
l1
delta P
20/26
3.00
-1.00
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L79L
5.3
Packaging mechanical data
Tape and reel for SOT-89
Figure 11. SOT-89 carrier tape drawing
Table 12. SOT-89 carrier tape dimensions
mm.
Dim.
Values
Tolerance
Ao
4.52
± 0.10
Bo
4.91
± 0.10
Ko
1.90
± 0.10
F
5.50
± 0.10
E
1.75
± 0.10
W
12
± 0.30
P2
2
± 0.10
Po
4
± 0.10
P1
8
± 0.10
T
0.30
± 0.10
D
Æ 1.55
± 0.05
D1
Æ 1.60
± 0.10
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Packaging mechanical data
5.4
L79L
Tape and reel for SO-8
Figure 12. SO-8 tape and reel dimensions
22/26
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L79L
Packaging mechanical data
Table 13. SO-8 tape and reel mechanical data
Dim.
Min.
Typ.
A
Max.
330
C
12.8
D
20.2
N
13.2
60
T
22.4
Ao
8.1
8.5
Bo
5.5
5.9
Ko
2.1
2.3
Po
3.9
4.1
P
7.9
8.1
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Order codes
6
L79L
Order codes
Table 14. Order codes
SO-8
TO-92 (bag)
TO-92
(Ammopak)
L79L05ABD13TR
L79L05ACZ
L79L05ABZ-AP
L79L05ACD13TR
L79L08ACZ-AP
L79L05ACZ-TR
SOT89
Output
voltage
L79L05ABUTR
TO-92 (tape and reel)
-5V
L79L05ACUTR
-5V
L79L08ACD13TR
L79L12ACD13TR
-8V
L79L12ACZ-TR
L79L12ACUTR
L79L15ABD13TR
-15V
L79L15ACD13TR
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-12V
L79L15ACUTR
DocID2511 Rev 17
-15V
L79L
Revision history
7
Revision history
Table 15. Document revision history
Date
Revision
14-Mar-2005
9
Add Tape and Reel for TO-92.
15-Mar-2005
10
Add note on Table 3.
23-Dec-2005
11
Mistake on ordering Table in Header.
12-Sep-2006
12
Order codes updated.
25-Jul-2007
13
Pin connection for SOT-89 updated on Figure 2.
04-Dec-2007
14
Modified: Table 14.
14-Jul-2008
15
Modified: Table 14 on page 24.
29-Jul-2009
16
Modified: Table 14 on page 24.
17
Part numbers L79LxxAB, L78LxxAC, L78LxxC changed to L79L.
Removed Table 1: Device summary.
Updated the features and description in cover page.
Updated Figure 1: Schematic diagram, Table 1: Absolute maximum ratings
and Table 14: Order codes.
Added Section 5: Packaging mechanical data.
Minor text changes.
17-Apr-2014
Changes
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L79L
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