78L33 (STMicroelectronics)
Positive voltage regulators

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L78L
Positive voltage regulators
Datasheet - production data
Features
Output current up to 100 mA
Output voltages of 3.3; 5; 6; 8; 9; 10; 12; 15;
18; 24 V thermal overload protection
Short-circuit protection
No external components are required
Available in either ± 4% (A) or ± 8% (C)
selection
Description
The L78L series of three-terminal positive
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 L78L series used as
Zener diode/resistor combination replacement,
offers e improvement along with lower quiescent
current and lower noise.
June 2016
DocID2145 Rev 26
This is information on a product in full production.
1/45
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Positive voltage regulators

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Contents
Contents
L78L
1 Diagram............................................................................................ 3
2 Pin configuration ............................................................................. 4
3 Maximum ratings ............................................................................. 5
4 Electrical characteristics ................................................................ 6
5 Typical performance ..................................................................... 25
6 Typical application ........................................................................ 27
7 Package information ..................................................................... 29
7.1 TO-92 package information............................................................. 29
7.2 TO-92 packing information .............................................................. 30
7.3 TO-92 Ammopak packing information............................................. 32
7.4 SO-8 package information .............................................................. 34
7.5 SO-8 packing information................................................................ 36
7.6 SOT-89 package information .......................................................... 37
7.7 SOT-89 packing information............................................................ 40
8 Ordering information..................................................................... 41
9 Revision history ............................................................................ 44
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Positive voltage regulators

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L78L
1 Diagram
Figure 1: Schematic diagram
Diagram
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Positive voltage regulators

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Pin configuration
2 Pin configuration
Figure 2: Pin connection (top view, bottom view for TO-92)
L78L
Figure 3: Test circuits
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L78L
Maximum ratings
3
Symbol
VI
IO
PD
TSTG
TOP
Maximum ratings
Table 1: Absolute maximum ratings
Parameter
DC Input voltage
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
VO = 3.3 to 9 V
VO = 12 to 15 V
VO = 18 to 24 V
for L78LxxAC / L78LxxC
for L78LxxAB
Value
30
35
40
100
Internally limited (1)
-65 to 150
0 to 125
-40 to 125
Unit
V
mA
mW
°C
°C
Notes:
(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.
Symbol
RthJC
RthJA
Parameter
Table 2: Thermal data
SO-8
Thermal resistance junction-case (max)
Thermal resistance junction-ambient (max)
20
55 (1)
Notes:
(1)Considering 6 cm² of copper Board heat-sink.
TO-92
200
SOT-89
15
55 (1)
Unit
°C/W
°C/W
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Positive voltage regulators

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Electrical characteristics
L78L
4 Electrical characteristics
Symbol
VO
VO
∆VO
∆VO
Id
∆Id
eN
SVR
Vd
Refer to the test circuits, TJ = 0 to 125 °C, VI = 8.3 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 3: Electrical characteristics of L78L33C
Parameter
Test conditions
Min. Typ. Max. Unit
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 5.3 to 20 V
IO = 1 to 70 mA, VI = 8.3 V
VI = 5.4 to 20 V, TJ = 25 °C
VI = 6.3 to 20 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 6.3 to 20 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 6.3 to 16.3 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
3.036 3.3 3.564 V
2.97
2.97
3.63
V
3.63
150
mV
100
60
mV
30
6 mA
5.5 mA
0.2
mA
1.5
40 µV
41 49
dB
2V
6/45 DocID2145 Rev 26


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Positive voltage regulators

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L78L
Symbol
VO
VO
∆VO
∆VO
Id
Id
eN
SVR
Vd
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C, VI = 10 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 4: Electrical characteristics of L78L05C
Parameter
Test conditions
Min. Typ. Max. Unit
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 7 to 20 V
IO = 1 to 70 mA, VI = 10 V
VI = 8.5 to 20 V, TJ = 25 °C
VI = 9 to 20 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 8 to 20 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 9 to 20 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
4.6 5 5.4 V
4.5 5.5
V
4.5 5.5
200
mV
150
60
mV
30
6 mA
5.5 mA
0.2
mA
1.5
40 µV
40 49
dB
2V
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Positive voltage regulators

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Electrical characteristics
L78L
Refer to the test circuits, TJ = 0 to 125 °C,VI = 14 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 5: Electrical characteristics of L78L08C
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
VO Output voltage
∆VO Line regulation
∆VO Load regulation
Id Quiescent current
∆Id
eN
SVR
Vd
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 8.5 to 20 V
IO = 1 to 70 mA, VI = 12 V
VI = 10.5 to 20 V, TJ = 25 °C
VI = 11 to 20 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 8 to 20 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 9 to 20 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
7.36 8 8.64 V
7.2 8.8
V
7.2 8.8
200
mV
150
80
mV
40
6 mA
5.5 mA
0.2
mA
1.5
60 µV
36 45
dB
1.7 V
8/45 DocID2145 Rev 26


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Positive voltage regulators

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L78L
Symbol
VO
VO
∆VO
∆VO
Id
∆Id
eN
SVR
Vd
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C, VI = 15 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 6: Electrical characteristics of L78L09C
Parameter
Test conditions
Min. Typ. Max. Unit
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 11.5 to 23 V
IO = 1 to 70 mA, VI = 15 V
VI = 11.5 to 23 V, TJ = 25 °C
VI = 12 to 23 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 12 to 23 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 12 to 23 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
8.28 9 9.72 V
8.1 9.9
V
8.1 9.9
250
mV
200
80
mV
40
6 mA
5.5 mA
0.2
mA
1.5
70 µV
36 44
dB
1.7 V
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Electrical characteristics
L78L
Refer to the test circuits, TJ = 0 to 125 °C, VI = 16 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 7: Electrical characteristics of L78L10C
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
VO Output voltage
∆VO Line regulation
∆VO Load regulation
Id Quiescent current
∆Id
eN
SVR
Vd
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 12.5 to 23 V
IO = 1 to 70 mA, VI = 16 V
VI = 12.5 to 23 V, TJ = 25 °C
VI = 13 to 23 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 13 to 23 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 14 to 23 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
9.2 10 10.8 V
9 11
V
9 11
230
mV
170
80
mV
40
6 mA
5.5 mA
0.1
mA
1.5
60 µV
37 45
dB
1.7 V
10/45
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Positive voltage regulators

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L78L
Symbol
VO
VO
∆VO
∆VO
Id
∆Id
eN
SVR
Vd
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C, VI = 19 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 8: Electrical characteristics of L78L12C
Parameter
Test conditions
Min. Typ. Max. Unit
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 14.5 to 27 V
IO = 1 to 70 mA, VI = 19 V
VI = 14.5 to 27 V, TJ = 25 °C
VI = 16 to 27 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 16 to 27 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 15 to 25 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
11.1 12 12.9 V
10.8 13.2
V
10.8 13.2
250
mV
200
100
mV
50
6.5 mA
6 mA
0.2
mA
1.5
80 µV
36 42
dB
1.7 V
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Positive voltage regulators

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Electrical characteristics
L78L
Refer to the test circuits, TJ = 0 to 125 °C, VI = 23 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified
Table 9: Electrical characteristics of L78L15C
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
VO Output voltage
∆VO Line regulation
∆VO Load regulation
Id Quiescent current
∆Id
eN
SVR
Vd
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 17.5 to 30 V
IO = 1 to 70 mA, VI = 23 V
VI = 17.5 to 30 V, TJ = 25 °C
VI = 20 to 30 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 20 to 30 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 18.5 to 28.5 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
13.8 15 16.2 V
13.5 16.5
V
13.5 16.5
300
mV
250
150
mV
75
6.5 mA
6 mA
0.2
mA
1.5
90 µV
33 39
dB
1.7 V
12/45
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L78L
Symbol
VO
VO
∆VO
∆VO
Id
∆Id
eN
SVR
Vd
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C, VI = 27 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 10: Electrical characteristics of L78L18C
Parameter
Test conditions
Min. Typ. Max. Unit
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 22 to 33 V
IO = 1 to 70 mA, VI = 27 V
VI = 22 to 33 V, TJ = 25 °C
VI = 22 to 33 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 23 to 33 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 23 to 33 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
16.6 18 19.4 V
16.2 19.8
V
16.2 19.8
320
mV
270
170
mV
85
6.5 mA
6 mA
0.2
mA
1.5
120 µV
32 38
dB
1.7 V
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Positive voltage regulators

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Electrical characteristics
L78L
Refer to the test circuits, TJ = 0 to 125 °C, VI = 33 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
Table 11: Electrical characteristics of L78L24C
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
VO Output voltage
∆VO Line regulation
∆VO Load regulation
Id Quiescent current
∆Id
eN
SVR
Vd
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 27 to 38 V
IO = 1 to 70 mA, VI = 33 V
VI = 27 to 38 V, TJ = 25 °C
VI = 28 to 38 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 28 to 38 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 29 to 35 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
22.1 24 25.9 V
21.6 26.4
V
21.6 26.4
350
mV
300
200
mV
100
6.5 mA
6 mA
0.2
mA
1.5
200 µV
30 37
dB
1.7 V
14/45
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Positive voltage regulators

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L78L
Symbol
VO
VO
∆VO
∆VO
Id
∆Id
eN
SVR
Vd
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40 to 125 °C (AB),VI = 8.3 V,
IO = 40mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified.
Table 12: Electrical characteristics of L78L33AB and L78L33AC
Parameter
Test conditions
Min. Typ. Max. Unit
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 5.3 to 20 V
IO = 1 to 70 mA, VI = 8.3 V
VI = 5.4 to 20 V, TJ = 25 °C
VI = 6.3 to 20 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 6.3 to 20 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 6.3 to 16.3 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
3.168 3.3 3.432 V
3.135
3.135
3.465
3.465
V
150
mV
100
60
mV
30
6 mA
5.5 mA
0.1
mA
1.5
40 µV
41 49
dB
2V
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Positive voltage regulators

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Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40 to 125 °C (AB), VI = 10 V,
IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified.
L78L
Table 13: Electrical characteristics of L78L05AB and L78L05AC
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
VO Output voltage
∆VO Line regulation
∆VO Load regulation
Id Quiescent current
∆Id
eN
SVR
Vd
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 7 to 20 V
IO = 1 to 70 mA, VI = 10 V
VI = 7.3 to 20 V, TJ = 25 °C
VI = 8 to 20 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 8 to 20 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 8 to 18 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
4.8 5 5.2 V
4.75 5.25
V
4.75 5.25
150
mV
100
60
mV
30
6 mA
5.5 mA
0.1
mA
1.5
40 µV
41 49
dB
2V
16/45
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L78L
Symbol
VO
VO
∆VO
∆VO
Id
∆Id
eN
SVR
Vd
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40 to 125 °C (AB), VI = 12 V,
IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified.
Table 14: Electrical characteristics of L78L06AB and L78L06AC
Parameter
Test conditions
Min. Typ. Max. Unit
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 8.5 to 20 V
IO = 1 to 70 mA, VI = 12 V
VI = 8.5 to 20 V, TJ = 25 °C
VI = 9 to 20 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 9 to 20 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 9 to 20 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
5.76 6 6.24 V
5.7 6.3
V
5.7 6.3
150
mV
100
60
mV
30
6 mA
5.5 mA
0.1
mA
1.5
50 µV
39 46
dB
1.7 V
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Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40 to 125 °C (AB), VI = 14 V,
IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified.
L78L
Table 15: Electrical characteristics of L78L08AB and L78L08AC
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
VO Output voltage
∆VO Line regulation
∆VO Load regulation
Id Quiescent current
∆Id
eN
SVR
Vd
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 10.5 to 23 V
IO = 1 to 70 mA, VI = 14 V
VI = 10.5 to 23 V, TJ = 25 °C
VI = 11 to 23 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 11 to 23 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 12 to 23 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
7.68 8 8.32 V
7.6 8.4
V
7.6 8.4
175
mV
125
80
mV
40
6 mA
5.5 mA
0.1
mA
1.5
60 µV
37 45
dB
1.7 V
18/45
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Positive voltage regulators

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L78L
Symbol
VO
VO
∆VO
∆VO
Id
∆Id
eN
SVR
Vd
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40 to 125 °C (AB), VI =15 V,
IO= 40 mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified.
Table 16: Electrical characteristics of L78L09AB and L78L09AC
Parameter
Test conditions
Min. Typ. Max. Unit
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 11.5 to 23 V
IO = 1 to 70 mA, VI = 15 V
VI = 11.5 to 23 V, TJ = 25 °C
VI = 12 to 23 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 12 to 23 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 12 to 23 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
8.64 9 9.36 V
8.55
8.55
9.45
V
9.45
225
mV
150
80
mV
40
6 mA
5.5 mA
0.1
mA
1.5
70 µV
37 44
dB
1.7 V
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Positive voltage regulators

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Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40 to 125 °C (AB), VI= 16 V,
IO = 40mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified.
L78L
Table 17: Electrical characteristics of L78L10AC
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
VO Output voltage
∆VO Line regulation
∆VO Load regulation
Id Quiescent current
∆Id
eN
SVR
Vd
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 12.5 to 23 V
IO = 1 to 70 mA, VI = 16 V
VI = 12.5 to 23 V, TJ = 25 °C
VI = 13 to 23 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 13 to 23 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 14 to 23 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
9.6 10 10.4 V
9.5 10.5
V
9.5 10.5
230
mV
170
80
mV
40
6 mA
5.5 mA
0.1
mA
1.5
60 µV
37 45
dB
1.7 V
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Positive voltage regulators

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L78L
Symbol
VO
VO
∆VO
∆VO
Id
∆Id
eN
SVR
Vd
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40 to 125 °C (AB), VI =19 V,
IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified.
Table 18: Electrical characteristics of L78L12AB and L78L12AC
Parameter
Test conditions
Min. Typ. Max. Unit
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 14.5 to 27 V
IO = 1 to 70 mA, VI = 19 V
VI = 14.5 to 27 V, TJ = 25 °C
VI = 16 to 27 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 16 to 27 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 15 to 25 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
11.5 12 12.5 V
11.4 12.6
V
11.4 12.6
250
mV
200
100
mV
50
6.5 mA
6 mA
0.1
mA
1.5
80 µV
37 42
dB
1.7 V
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Positive voltage regulators

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Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40 to 125 °C (AB),VI = 23 V,
IO= 40 mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified.
L78L
Table 19: Electrical characteristics of L78L15AB and L78L15AC
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
VO Output voltage
∆VO Line regulation
∆VO Load regulation
Id Quiescent current
∆Id
eN
SVR
Vd
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 17.5 to 30 V
IO = 1 to 70 mA, VI = 23 V
VI = 17.5 to 30 V, TJ = 25 °C
VI = 20 to 30 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 20 to 30 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 18.5 to 28.5 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
14.4 15 15.6 V
14.25
14.25
15.75
15.75
V
300
mV
250
150
mV
75
6.5 mA
6 mA
0.1
mA
1.5
90 µV
34 39
dB
1.7 V
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Positive voltage regulators

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L78L
Symbol
VO
VO
∆VO
∆VO
Id
∆Id
eN
SVR
Vd
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40 to 125 °C (AB),VI = 27 V,
IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified.
Table 20: Electrical characteristics of L78L18AC
Parameter
Test conditions
Min. Typ. Max. Unit
Output voltage
Output voltage
Line regulation
Load regulation
Quiescent current
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 22 to 33 V
IO = 1 to 70 mA, VI = 27 V
VI = 22 to 33 V, TJ = 25 °C
VI = 22 to 33 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 23 to 33 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 23 to 33 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
17.3 18 18.7 V
17.1 18.9
V
17.1 18.9
320
mV
270
170
mV
85
6.5 mA
6 mA
0.1
mA
1.5
120 µV
33 38
dB
1.7 V
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Positive voltage regulators

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Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40 to 125 °C (AB),VI = 33 V,
IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified.
Table 21: Electrical characteristics of L78L24AB and L78L24AC
Symbol
Parameter
Test conditions
Min. Typ. Max.
VO Output voltage
VO Output voltage
∆VO Line regulation
∆VO Load regulation
Id Quiescent current
∆Id
eN
SVR
Vd
Quiescent current change
Output noise voltage
Supply voltage rejection
Dropout voltage
TJ = 25 °C
IO = 1 to 40 mA, VI = 27 to 38 V
IO = 1 to 70 mA, VI = 33 V
VI = 27 to 38 V, TJ = 25 °C
VI = 28 to 38 V, TJ = 25 °C
IO = 1 to 100 mA, TJ = 25 °C
IO = 1 to 40 mA, TJ = 25 °C
TJ = 25 °C
TJ = 125 °C
IO = 1 to 40 mA
VI = 28 to 38 V
B = 10 Hz to 100 kHz, TJ = 25 °C
VI = 29 to 33 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C
23 24 25
22.8 25.2
22.8 25.2
350
300
200
100
6.5
6
0.1
1.5
200
31 37
1.7
L78L
Unit
V
V
mV
mV
mA
mA
mA
µV5y
dB
V
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Positive voltage regulators

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L78L
5 Typical performance
Figure 4: L78L05/12 output voltage vs. ambient
temperature
Typical performance
Figure 5: L78L05/12/24 load characteristics
Figure 6: L78L05/12/24 thermal shutdown
Figure 7: L78L05/12 quiescent current vs. output
current
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Positive voltage regulators

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Typical performance
Figure 8: L78L05 quiescent current vs. input voltage
L78L
Figure 9: L78L05/12/24 output characteristics
Figure 10: L78L05/12/24 ripple rejection
Figure 11: L78L05 dropout characteristics
Figure 12: L78L short-circuit output current
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Positive voltage regulators

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L78L
6
Typical application
Typical application
Figure 13: High output current short-circuit protected
Figure 14: Outuput boost circuit
Figure 15: Current regulator
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Positive voltage regulators

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Typical application
Figure 16: Adjustable output regulator
L78L
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Positive voltage regulators

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L78L
7
7.1
Package information
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
TO-92 package information
Figure 17: TO-92 package outline
Dim.
A
b
D
E
e
e1
L
R
S1
W
V
Table 22: TO-92 mechanical data
mm
Min.
Typ.
4.32
0.36
4.45
3.30
2.41
1.14
12.70
2.16
0.92
0.41
DocID2145 Rev 26
Max.
4.95
0.51
4.95
3.94
2.67
1.40
15.49
2.41
1.52
0.56
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Package information
7.2 TO-92 packing information
Figure 18: TO-92 tape and reel outline
L78L
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