This is information on a product in full production.
September 2012 Doc ID 2145 Rev 21 1/33
33
L78LxxAB,
L78LxxAC, L78LxxC
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% (AC) or ± 8% (C)
selection
Description
The L78Lxx 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 L78Lxx 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.
SOT-89
TO-92
SO-8
Table 1. Device summary
Part numbers
L78L33C L78L08AC L78L15C
L78L33AC L78L08AB L78L15AC
L78L33AB L78L09C L78L15AB
L78L05C L78L09AC L78L18C
L78L05AC L78L09AB L78L18AC
L78L05AB L78L10AC L78L24C
L78L06AC L78L12C L78L24AC
L78L06AB L78L12AC L78L24AB
L78L08C L78L12AB
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Contents L78LxxAB, L78LxxAC, L78LxxC
2/33 Doc ID 2145 Rev 21
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
L78LxxAB, L78LxxAC, L78LxxC Diagram
Doc ID 2145 Rev 21 3/33
1 Diagram
Figure 1. Schematic diagram
Pin configuration L78LxxAB, L78LxxAC, L78LxxC
4/33 Doc ID 2145 Rev 21
2 Pin configuration
Figure 2. Pin connection (top view, bottom view for TO-92)
SOT-89
SO-8 TO-92
PIN 1 = VOUT
PIN 2 = GND
PIN 3 = VIN
Figure 3. Test circuits
L78LxxAB, L78LxxAC, L78LxxC Maximum ratings
Doc ID 2145 Rev 21 5/33
3 Maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
VIDC Input voltage
VO= 3.3 to 9 V 30
VVO= 12 to 15 V 35
VO= 18 to 24 V 40
IOOutput current 100 mA
PDPower dissipation Internally limited (1)
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.
mW
TSTG Storage temperature range -65 to 150 °C
TOP Operating junction temperature range for L78L00AC 0 to 125 °C
for L78L00AB -40 to 125
Table 3. Thermal data
Symbol Parameter SO-8 TO-92 SOT-89 Unit
RthJC Thermal resistance junction-case. (max) 20 15 °C/W
RthJA Thermal resistance junction-ambient. (max) 55 (1) 200 55 (1) °C/W
1. Considering 6 cm² of copper Board heat-sink.
Electrical characteristics L78LxxAB, L78LxxAC, L78LxxC
6/33 Doc ID 2145 Rev 21
4 Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF unless
otherwise specified.
Table 4. Electrical characteristics of L78L33C (VI = 8.3 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 3.036 3.3 3.564 V
VOOutput voltage IO = 1 to 40 mA, VI = 5.3 to 20 V 2.97 3.63 V
IO = 1 to 70 mA, VI = 8.3 V 2.97 3.63
ΔVOLine regulation VI = 5.3 to 20 V, TJ = 25 °C 150 mV
VI = 6.3 to 20 V, TJ = 25 °C 100
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 60 mV
IO = 1 to 40 mA, TJ = 25 °C 30
IdQuiescent current TJ = 25 °C 6 mA
TJ = 125 °C 5.5 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.2 mA
VI = 6.3 to 20 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 40 µV
SVR Supply voltage rejection VI = 6.3 to 16.3 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 41 49 dB
VdDropout voltage 1.7 V
Table 5. Electrical characteristics of L78L05C (VI = 10 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 4.6 5 5.4 V
VOOutput voltage IO = 1 to 40 mA, VI = 7 to 20 V 4.5 5.5 V
IO = 1 to 70 mA, VI = 10 V 4.5 5.5
ΔVOLine regulation VI = 8.5 to 20 V, TJ = 25 °C 200 mV
VI = 9 to 20 V, TJ = 25 °C 150
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 60 mV
IO = 1 to 40 mA, TJ = 25 °C 30
IdQuiescent current TJ = 25 °C 6 mA
TJ = 125 °C 5.5 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.2 mA
VI = 8 to 20 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 40 µV
L78LxxAB, L78LxxAC, L78LxxC Electrical characteristics
Doc ID 2145 Rev 21 7/33
SVR Supply voltage rejection VI = 9 to 20 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 40 49 dB
VdDropout voltage 1.7 V
Table 5. Electrical characteristics of L78L05C (VI = 10 V) (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Table 6. Electrical characteristics of L78L08C (VI = 14 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 7.36 8 8.64 V
VOOutput voltage IO = 1 to 40 mA, VI = 8.5 to 20 V 7.2 8.8 V
IO = 1 to 70 mA, VI = 12 V 7.2 8.8
ΔVOLine regulation VI = 8.5 to 20 V, TJ = 25 °C 200 mV
VI = 9 to 20 V, TJ = 25 °C 150
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 80 mV
IO = 1 to 40 mA, TJ = 25 °C 40
IdQuiescent current TJ = 25 °C 6 mA
TJ = 125 °C 5.5 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.2 mA
VI = 8 to 20 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 60 µV
SVR Supply voltage rejection VI = 9 to 20 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 36 45 dB
VdDropout voltage 1.7 V
Table 7. Electrical characteristics of L78L09C (VI = 15 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 8.28 9 9.72 V
VOOutput voltage IO = 1 to 40 mA, VI = 11.5 to 23 V 8.1 9.9 V
IO = 1 to 70 mA, VI = 15 V 8.1 9.9
ΔVOLine regulation VI = 11.5 to 23 V, TJ = 25 °C 250 mV
VI = 12 to 23 V, TJ = 25 °C 200
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 80 mV
IO = 1 to 40 mA, TJ = 25 °C 40
IdQuiescent current TJ = 25 °C 6 mA
TJ = 125 °C 5.5 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.2 mA
VI = 12 to 23 V 1.5
Electrical characteristics L78LxxAB, L78LxxAC, L78LxxC
8/33 Doc ID 2145 Rev 21
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 70 µV
SVR Supply voltage rejection VI = 12 to 23 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 36 44 dB
VdDropout voltage 1.7 V
Table 7. Electrical characteristics of L78L09C (VI = 15 V) (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Table 8. Electrical characteristics of L78L10C (VI = 16 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 9.2 10 10.8 V
VOOutput voltage IO = 1 to 40 mA, VI = 12.5 to 23 V 9 11 V
IO = 1 to 70 mA, VI = 16 V 9 11
ΔVOLine regulation VI = 12.5 to 23 V, TJ = 25 °C 230 mV
VI = 13 to 23 V, TJ = 25 °C 170
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 80 mV
IO = 1 to 40 mA, TJ = 25 °C 40
IdQuiescent current TJ = 25 °C 6 mA
TJ = 125 °C 5.5 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.1 mA
VI = 13 to 23 V 1.5
eN Output noise voltage B =10Hz to 100kHz, TJ = 25 °C 60 µV
SVR Supply voltage rejection VI = 14 to 23 V, f = 120Hz
IO = 40 mA, TJ = 25 °C 37 45 dB
VdDropout voltage 1.7 V
Table 9. Electrical characteristics of L78L12C (VI = 19 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 11.1 12 12.9 V
VOOutput voltage IO = 1 to 40 mA, VI = 14.5 to 27 V 10.8 13.2 V
IO = 1 to 70 mA, VI = 19 V 10.8 13.2
ΔVOLine regulation VI = 14.5 to 27 V, TJ = 25 °C 250 mV
VI = 16 to 27 V, TJ = 25 °C 200
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 100 mV
IO = 1 to 40 mA, TJ = 25 °C 50
IdQuiescent current TJ = 25 °C 6.5 mA
TJ = 125 °C 6 mA
L78LxxAB, L78LxxAC, L78LxxC Electrical characteristics
Doc ID 2145 Rev 21 9/33
ΔIdQuiescent current change IO = 1 to 40 mA 0.2 mA
VI = 16 to 27 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 80 µV
SVR Supply voltage rejection VI = 15 to 25 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 36 42 dB
VdDropout voltage 1.7 V
Table 9. Electrical characteristics of L78L12C (VI = 19 V) (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Table 10. Electrical characteristics of L78L15C (VI = 23 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 13.8 15 16.2 V
VOOutput voltage IO = 1 to 40 mA, VI = 17.5 to 30 V 13.5 16.5 V
IO = 1 to 70 mA, VI = 23 V 13.5 16.5
ΔVOLine regulation VI = 17.5 to 30 V, TJ = 25 °C 300 mV
VI = 20 to 30 V, TJ = 25 °C 250
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 150 mV
IO = 1 to 40 mA, TJ = 25 °C 75
IdQuiescent current TJ = 25 °C 6.5 mA
TJ = 125 °C 6 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.2 mA
VI = 20 to 30 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 90 µV
SVR Supply voltage rejection VI = 18.5 to 28.5 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 33 39 dB
VdDropout voltage 1.7 V
Table 11. Electrical characteristics of L78L18C (VI = 27 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 16.6 18 19.4 V
VOOutput voltage IO = 1 to 40 mA, VI = 22 to 33 V 16.2 19.8 V
IO = 1 to 70 mA, VI = 27 V 16.2 19.8
ΔVOLine regulation VI = 22 to 33 V, TJ = 25 °C 320 mV
VI = 22 to 33 V, TJ = 25 °C 270
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 170 mV
IO = 1 to 40 mA, TJ = 25 °C 85
Electrical characteristics L78LxxAB, L78LxxAC, L78LxxC
10/33 Doc ID 2145 Rev 21
TJ = 0 to 125 °C for L78L33AC, TJ = -40 to 125 °C for L78L33AB.
IdQuiescent current TJ = 25 °C 6.5 mA
TJ = 125 °C 6 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.2 mA
VI = 23 to 33 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 120 µV
SVR Supply voltage rejection VI = 23 to 33 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 32 38 dB
VdDropout voltage 1.7 V
Table 11. Electrical characteristics of L78L18C (VI = 27 V) (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Table 12. Electrical characteristics of L78L24C (VI = 33 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 22.1 24 25.9 V
VOOutput voltage IO = 1 to 40 mA, VI = 27 to 38 V 21.6 26.4 V
IO = 1 to 70 mA, VI = 33 V 21.6 26.4
ΔVOLine regulation VI = 27 to 38 V, TJ = 25 °C 350 mV
VI = 28 to 38 V, TJ = 25 °C 300
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 200 mV
IO = 1 to 40 mA, TJ = 25 °C 100
IdQuiescent current TJ = 25 °C 6.5 mA
TJ = 125 °C 6 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.2 mA
VI = 28 to 38 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 200 µV
SVR Supply voltage rejection VI = 29 to 35 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 30 37 dB
VdDropout voltage 1.7 V
Table 13. Electrical characteristics of L78L33AB and L78L33AC (VI = 8.3 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 3.168 3.3 3.432 V
VOOutput voltage IO = 1 to 40 mA, VI = 5.3 to 20 V 3.135 3.465 V
IO = 1 to 70 mA, VI = 8.3 V 3.135 3.465
ΔVOLine regulation VI = 5.3 to 20 V, TJ = 25 °C 150 mV
VI = 6.3 to 20 V, TJ = 25 °C 100
L78LxxAB, L78LxxAC, L78LxxC Electrical characteristics
Doc ID 2145 Rev 21 11/33
TJ = 0 to 125 °C for L78L05AC, TJ = -40 to 125 °C for L78L05AB.
TJ = 0 to 125 °C for L78L06AC, TJ = -40 to 125 °C for L78L06AB.
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 60 mV
IO = 1 to 40 mA, TJ = 25 °C 30
IdQuiescent current TJ = 25 °C 6 mA
TJ = 125 °C 5.5 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.1 mA
VI = 6.3 to 20 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 40 µV
SVR Supply voltage rejection VI = 6.3 to 16.3 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 41 49 dB
VdDropout voltage 1.7 V
Table 13. Electrical characteristics of L78L33AB and L78L33AC (VI = 8.3 V) (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Table 14. Electrical characteristics of L78L05AB and L78L05AC (VI = 10 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 4.8 5 5.2 V
VOOutput voltage IO = 1 to 40 mA, VI = 7 to 20 V 4.75 5.25 V
IO = 1 to 70 mA, VI = 10 V 4.75 5.25
ΔVOLine regulation VI = 7 to 20 V, TJ = 25 °C 150 mV
VI = 8 to 20 V, TJ = 25 °C 100
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 60 mV
IO = 1 to 40 mA, TJ = 25 °C 30
IdQuiescent current TJ = 25 °C 6 mA
TJ = 125 °C 5.5 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.1 mA
VI = 8 to 20 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 40 µV
SVR Supply voltage rejection VI = 8 to 18 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 41 49 dB
VdDropout voltage 1.7 V
Electrical characteristics L78LxxAB, L78LxxAC, L78LxxC
12/33 Doc ID 2145 Rev 21
TJ = 0 to 125 °C for L78L08AC, TJ = -40 to 125 °C for L78L08AB.
Table 15. Electrical characteristics of L78L06AB and L78L06AC (VI = 12 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 5.76 6 6.24 V
VOOutput voltage IO = 1 to 40 mA, VI = 8.5 to 20 V 5.7 6.3 V
IO = 1 to 70 mA, VI = 12 V 5.7 6.3
ΔVOLine regulation VI = 8.5 to 20 V, TJ = 25 °C 150 mV
VI = 9 to 20 V, TJ = 25 °C 100
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 60 mV
IO = 1 to 40 mA, TJ = 25 °C 30
IdQuiescent current TJ = 25 °C 6 mA
TJ = 125 °C 5.5 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.1 mA
VI = 9 to 20 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 50 µV
SVR Supply voltage rejection VI = 9 to 20 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 39 46 dB
VdDropout voltage 1.7 V
Table 16. Electrical characteristics of L78L08AB and L78L08AC (VI = 14 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 7.68 8 8.32 V
VOOutput voltage IO = 1 to 40 mA, VI = 10.5 to 23 V 7.6 8.4 V
IO = 1 to 70 mA, VI = 14 V 7.6 8.4
ΔVOLine regulation VI = 10.5 to 23 V, TJ = 25 °C 175 mV
VI = 11 to 23 V, TJ = 25 °C 125
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 80 mV
IO = 1 to 40 mA, TJ = 25 °C 40
IdQuiescent current TJ = 25 °C 6 mA
TJ = 125 °C 5.5 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.1 mA
VI = 11 to 23 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 60 µV
SVR Supply voltage rejection VI = 12 to 23 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 37 45 dB
VdDropout voltage 1.7 V
L78LxxAB, L78LxxAC, L78LxxC Electrical characteristics
Doc ID 2145 Rev 21 13/33
TJ = 0 to 125 °C for L78L09AC, TJ = -40 to 125 °C for L78L09AB.
TJ = 0 to 125 °C for L78L10AC, TJ = -40 to 125 °C for L78L10AB.
Table 17. Electrical characteristics of L78L09AB and L78L09AC (VI = 15 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 8.64 9 9.36 V
VOOutput voltage IO = 1 to 40 mA, VI = 11.5 to 23 V 8.55 9.45 V
IO = 1 to 70 mA, VI = 15 V 8.55 9.45
ΔVOLine regulation VI = 11.5 to 23 V, TJ = 25 °C 225 mV
VI = 12 to 23 V, TJ = 25 °C 150
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 80 mV
IO = 1 to 40 mA, TJ = 25 °C 40
IdQuiescent current TJ = 25 °C 6 mA
TJ = 125 °C 5.5 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.1 mA
VI = 12 to 23 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 70 µV
SVR Supply voltage rejection VI = 12 to 23 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 37 44 dB
VdDropout voltage 1.7 V
Table 18. Electrical characteristics of L78L10AC (VI = 16 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 9.6 10 10.4 V
VOOutput voltage IO = 1 to 40 mA, VI = 12.5 to 23 V 9.5 10.5 V
IO = 1 to 70 mA, VI = 16 V 9.5 10.5
ΔVOLine regulation VI = 12.5 to 23 V, TJ = 25 °C 230 mV
VI = 13 to 23 V, TJ = 25 °C 170
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 80 mV
IO = 1 to 40 mA, TJ = 25 °C 40
IdQuiescent current TJ = 25 °C 6 mA
TJ = 125 °C 5.5 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.1 mA
VI = 13 to 23 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 60 µV
SVR Supply voltage rejection VI = 14 to 23 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 37 45 dB
VdDropout voltage 1.7 V
Electrical characteristics L78LxxAB, L78LxxAC, L78LxxC
14/33 Doc ID 2145 Rev 21
TJ = 0 to 125 °C for L78L12AC, TJ = -40 to 125 °C for L78L12AB.
TJ = 0 to 125 °C for L78L15AC, TJ = -40 to 125 °C for L78L15AB.
Table 19. Electrical characteristics of L78L12AB and L78L12AC (VI = 19 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 11.5 12 12.5 V
VOOutput voltage IO = 1 to 40 mA, VI = 14.5 to 27 V 11.4 12.6 V
IO = 1 to 70 mA, VI = 19 V 11.4 12.6
ΔVOLine regulation VI = 14.5 to 27 V, TJ = 25 °C 250 mV
VI = 16 to 27 V, TJ = 25 °C 200
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 100 mV
IO = 1 to 40 mA, TJ = 25 °C 50
IdQuiescent current TJ = 25 °C 6.5 mA
TJ = 125 °C 6 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.1 mA
VI = 16 to 27 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 80 µV
SVR Supply voltage rejection VI = 15 to 25 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 37 42 dB
VdDropout voltage 1.7 V
Table 20. Electrical characteristics of L78L15AB and L78L15AC (VI = 23 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 14.4 15 15.6 V
VOOutput voltage IO = 1 to 40 mA, VI = 17.5 to 30 V 14.25 15.75 V
IO = 1 to 70 mA, VI = 23 V 14.25 15.75
ΔVOLine regulation VI = 17.5 to 30 V, TJ = 25 °C 300 mV
VI = 20 to 30 V, TJ = 25 °C 250
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 150 mV
IO = 1 to 40 mA, TJ = 25 °C 75
IdQuiescent current TJ = 25 °C 6.5 mA
TJ = 125 °C 6 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.1 mA
VI = 20 to 30 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 90 µV
SVR Supply voltage rejection VI = 18.5 to 28.5 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 34 39 dB
VdDropout voltage 1.7 V
L78LxxAB, L78LxxAC, L78LxxC Electrical characteristics
Doc ID 2145 Rev 21 15/33
TJ = 0 to 125 °C for L78L18AC, TJ = -40 to 125 °C for L78L18AB.
TJ = 0 to 125 °C for L78L24AC, TJ = -40 to 125 °C for L78L24AB.
Table 21. Electrical characteristics of L78L18AC (VI = 27 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 17.3 18 18.7 V
VOOutput voltage IO = 1 to 40 mA, VI = 22 to 33 V 17.1 18.9 V
IO = 1 to 70 mA, VI = 27 V 17.1 18.9
ΔVOLine regulation VI = 22 to 33 V, TJ = 25 °C 320 mV
VI = 22 to 33 V, TJ = 25 °C 270
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 170 mV
IO = 1 to 40 mA, TJ = 25 °C 85
IdQuiescent current TJ = 25 °C 6.5 mA
TJ = 125 °C 6 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.1 mA
VI = 23 to 33 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 120 µV
SVR Supply voltage rejection VI = 23 to 33 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 33 38 dB
VdDropout voltage 1.7 V
Table 22. Electrical characteristics of L78L24AB and L78L24AC (VI = 33 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOOutput voltage TJ = 25 °C 23 24 25 V
VOOutput voltage IO = 1 to 40 mA, VI = 27 to 38 V 22.8 25.2 V
IO = 1 to 70 mA, VI = 33 V 22.8 25.2
ΔVOLine regulation VI = 27 to 38 V, TJ = 25 °C 350 mV
VI = 28 to 38 V, TJ = 25 °C 300
ΔVOLoad regulation IO = 1 to 100 mA, TJ = 25 °C 200 mV
IO = 1 to 40 mA, TJ = 25 °C 100
IdQuiescent current TJ = 25 °C 6.5 mA
TJ = 125 °C 6 mA
ΔIdQuiescent current change IO = 1 to 40 mA 0.1 mA
VI = 28 to 38 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, TJ = 25 °C 200 µV
SVR Supply voltage rejection VI = 29 to 33 V, f = 120 Hz
IO = 40 mA, TJ = 25 °C 31 37 dB
VdDropout voltage 1.7 V
Typical performance L78LxxAB, L78LxxAC, L78LxxC
16/33 Doc ID 2145 Rev 21
5 Typical performance
Figure 4. L78L05/12 output voltage vs.
ambient temperature
Figure 5. L78L05/12/24 load characteristics
Figure 6. L78L05/12/24 thermal shutdown Figure 7. L78L05/12 quiescent current vs.
output current
L78LxxAB, L78LxxAC, L78LxxC Typical performance
Doc ID 2145 Rev 21 17/33
Figure 8. L78L05 quiescent current vs. input
voltage
Figure 9. L78L05/12/24 output characteristics
Figure 10. L78L05/12/24 ripple rejection Figure 11. L78L05 dropout characteristics
Figure 12. L78Lxx short-circuit output current
Typical application L78LxxAB, L78LxxAC, L78LxxC
18/33 Doc ID 2145 Rev 21
6 Typical application
Figure 13. High output current short-circuit protected
Figure 14. Edit boost circuit
Figure 15. Current regulator
L78LxxAB, L78LxxAC, L78LxxC Typical application
Doc ID 2145 Rev 21 19/33
Figure 16. Adjustable output regulator
Package mechanical data L78LxxAB, L78LxxAC, L78LxxC
20/33 Doc ID 2145 Rev 21
7 Package mechanical data
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.
L78LxxAB, L78LxxAC, L78LxxC Package mechanical data
Doc ID 2145 Rev 21 21/33
Dim. mm. inch.
Min. Typ. Max. Min. Typ. Max.
A1.35 1.75 0.0530.069
A1 0.10 0.25 0.04 0.010
A2 1.10 1.65 0.0430.065
B0.33 0.51 0.0130.020
C0.190.25 0.007 0.010
D4.80 5.00 0.189 0.197
E3.80 4.00 0.150 0.157
e 1.27 0.050
H5.80 6.20 0.2280.244
h 0.25 0.50 0.010 0.020
L 0.40 1.27 0.016 0.050
k8° (max.)
ddd 0.1 0.04
SO-8 mechanical data
0016023/C
Package mechanical data L78LxxAB, L78LxxAC, L78LxxC
22/33 Doc ID 2145 Rev 21
Dim.
mm. mils.
Min. Typ. Max. Min. Typ. Max.
A 1.4 1.6 55.1 63.0
B 0.44 0.56 17.322.0
B1 0.36 0.4814.2 18.9
C0.35 0.44 13.817.3
C1 0.35 0.44 13.817.3
D 4.4 4.6 173.2 181.1
D1 1.62 1.83 63.872.0
E2.292.6 90.2 102.4
e 1.42 1.57 55.961.8
e1 2.923.07 115.0 120.9
H3.94 4.25 155.1 167.3
L0.89 1.2 35.0 47.2
SOT-89 mechanical data
P025H
L78LxxAB, L78LxxAC, L78LxxC Package mechanical data
Doc ID 2145 Rev 21 23/33
Dim.
mm. mils.
Min. Typ. Max. Min. Typ. Max.
A4.324.95 170.1 194.9
b0.36 0.51 14.2 20.1
D 4.45 4.95 175.2 194.9
E3.303.94 129.9155.1
e 2.41 2.67 94.9105.1
e1 1.14 1.40 44.955.1
L 12.7 15.49500.0 609.8
R 2.16 2.41 85.0 94.9
S1 0.92 1.52 36.2 59.8
W 0.41 0.56 16.1 22.0
α5° 5°
TO-92 mechanical data
0102782/D
Package mechanical data L78LxxAB, L78LxxAC, L78LxxC
24/33 Doc ID 2145 Rev 21
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A330 12.992
C 12.813.2 0.504 0.519
D 20.2 0.795
N60 2.362
T 22.4 0.882
Ao 8.1 8.5 0.3190.335
Bo 5.5 5.90.216 0.232
Ko 2.1 2.30.082 0.090
Po 3.94.1 0.1530.161
P7.98.1 0.311 0.319
Tape & reel SO-8 mechanical data
L78LxxAB, L78LxxAC, L78LxxC Package mechanical data
Doc ID 2145 Rev 21 25/33
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A180 7.086
C 12.813.0 13.2 0.504 0.512 0.519
D 20.2 0.795
N60 2.362
T 14.4 0.567
Ao 4.70 4.80 4.90 0.185 0.189 0.193
Bo 4.30 4.40 4.50 0.1690.1730.177
Ko 1.70 1.80 1.90 0.067 0.071 0.075
Po 3.94.0 4.1 0.1530.157 0.161
P7.98.0 8.1 0.311 0.315 0.319
Tape & reel SOT-89 mechanical data
Package mechanical data L78LxxAB, L78LxxAC, L78LxxC
26/33 Doc ID 2145 Rev 21
Table 23. Tape and reel TO-92 mechanical data
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A1 (1) 4.80 0.189
T (1) 3.80 0.150
T1 1.60 0.063
T2 2.30 0.091
d 0.48 0.019
P0 12.5 12.9 0.492 0.508
P2 5.65 7.05 0.222 0.278
F1, F2 2.44 2.54 2.94 0.096 0.100 0.116
delta H ±2 0.079
W 17.5 18.00 19.0 0.689 0.709 0.748
W0 5.7 6.3 0.224 0.248
W1 8.5 9.25 0.335 0.364
W2 0.50 0.20
H 18.50 18.70 0.728 0.726
H0 15.50 16.50 0.610 0.650
H1 25.00 0.984
D0 3.8 4.2 0.150 0.165
t 0.90 0.035
L1 3 0.118
delta P ±1 0.039
u 50 1.968
Φ1 360 14.173
Φ2 30 1.181
1. For the MAX and MIN values refer to the TO-92 mechanical data
on page 23
.
L78LxxAB, L78LxxAC, L78LxxC Package mechanical data
Doc ID 2145 Rev 21 27/33
Figure 17. Tape and reel TO-92 drawing dimension
W
W1
W0
W2
A1
d
D0
H1
H
H0
L
l1
F1 F2
P2
P0
delta P
delta H
T2 T1
T
t
DRAWING NOT IN SCALE
Order codes L78LxxAB, L78LxxAC, L78LxxC
28/33 Doc ID 2145 Rev 21
8 Order codes
Table 24. Order codes
Part numbers
Packages
Output voltages
SO-8 TO92 (BAG) (1)
1. Available in Ammopak with the suffix "-AP" or in tape and reel with the suffix "TR". Please note that in these cases pins are
shaped according to tape and reel specifications.
SOT-89
L78L33C L78L33CD-TR 3.3 V
L78L33AC L78L33ACD13TR L78L33ACZ L78L33ACUTR 3.3 V
L78L33AB L78L33ABD-TR L78L33ABZ L78L33ABUTR 3.3 V
L78L05C L78L05CD13TR L78L05CZ 5 V
L78L05AC L78L05ACD13TR L78L05ACZ L78L05ACUTR 5 V
L78L05AB L78L05ABD13TR L78L05ABZ L78L05ABUTR 5 V
L78L06AC L78L06ACD13TR L78L06ACZ L78L06ACUTR 6 V
L78L06AB L78L06ABD13TR L78L06ABZ L78L06ABUTR 6 V
L78L08C L78L08CD13TR 8 V
L78L08AC L78L08ACD13TR L78L08ACZ L78L08ACUTR 8 V
L78L08AB L78L08ABD13TR L78L08ABZ L78L08ABUTR 8 V
L78L09C L78L09CD13TR 9 V
L78L09AC L78L09ACD13TR L78L09ACZ L78L09ACUTR 9 V
L78L09AB L78L09ABD13TR L78L09ABZ L78L09ABUTR 9 V
L78L10AC L78L10ACUTR 10 V
L78L12C L78L12CD13TR 12 V
L78L12AC L78L12ACD13TR L78L12ACZ L78L12ACUTR 12 V
L78L12AB L78L12ABD-TR L78L12ABZ L78L12ABUTR 12 V
L78L15C L78L15CD-TR 15 V
L78L15AC L78L15ACD13TR L78L15ACZ L78L15ACUTR 15 V
L78L15AB L78L15ABZ L78L15ABUTR 15 V
L78L18C L78L18CD13TR 18 V
L78L18AC L78L18ACUTR 18 V
L78L24C L78L24CD-TR 24 V
L78L24AC L78L24ACZ L78L24ACUTR 24 V
L78L24AB L78L24ABZ 24 V
L78LxxAB, L78LxxAC, L78LxxC Order codes
Doc ID 2145 Rev 21 29/33
Table 25. Marking information
Part numbers Marking Packages Output voltages
L78L05ABD 78L05B SO8 5 V
L78L05ABUTR 8C SOT 89 5 V
L78L05ABZ L78L05 TO 92 5 V
L78L05ABZ-AP L78L05 TO 92 5 V
L78L05ABZ-TR L78L05 TO 92 5 V
L78L05ACD 78L05A SO8 5 V
L78L05ACUTR 8C SOT 89 5 V
L78L05ACZ L78L05 TO 92 5 V
L78L05ACZ-AP L78L05 TO 92 5 V
L78L05ACZTR L78L05 TO 92 5 V
L78L05CD 78L05 SO8 5 V
L78L05CZ L78L05 TO 92 5 V
L78L06ABD 78L06B SO8 6 V
L78L06ABUTR 8E SOT 89 6 V
L78L06ABZ L78L06 TO 92 6 V
L78L06ACD 78L06A SO8 6 V
L78L06ACUTR 8E SOT 89 6 V
L78L06ACZ L78L06 TO 92 6 V
L78L06ACZ-AP L78L06 TO 92 6 V
L78L06ACZ-TR L78L06 TO 92 6 V
L78L06CD 78L06 SO8 6 V
L78L08ABD 78L08B SO8 8 V
L78L08ABUTR 8G SOT 89 8 V
L78L08ABZ L78L08 TO 92 8 V
L78L08ABZ-AP L78L08 TO 92 8 V
L78L08ABZTR L78L08 TO 92 8 V
L78L08ACD 78L08A SO8 8 V
L78L08ACUTR 8G SOT 89 8 V
L78L08ACZ L78L08 TO 92 8 V
L78L08ACZ-AP L78L08 TO 92 8 V
L78L08ACZTR L78L08 TO 92 8 V
L78L08CD 78L08 SO8 8 V
L78L09ABD 78L09B SO8 9 V
L78L09ABUTR 8H SOT 89 9 V
L78L09ABZ L78L09 TO 92 9 V
Order codes L78LxxAB, L78LxxAC, L78LxxC
30/33 Doc ID 2145 Rev 21
Part numbers Marking Packages Output voltages
L78L09ACD 78L09A SO8 9 V
L78L09ACUTR 8H SOT 89 9 V
L78L09ACZ L78L09 TO 92 9 V
L78L09ACZ-AP L78L09 TO 92 9 V
L78L09ACZ-TR L78L09 TO 92 9 V
L78L09CD 78L09 SO8 9 V
L78L10ACUTR 8I SOT 89 10 V
L78L12ABD 78L12B SO8 12 V
L78L12ABUTR 8K SOT 89 12 V
L78L12ABZ L78L12 TO 92 12 V
L78L12ABZ-AP L78L12 TO 92 12 V
L78L12ACD 78L12A SO8 12 V
L78L12ACUTR 8K SOT 89 12 V
L78L12ACZ L78L12 TO 92 12 V
L78L12ACZ-AP L78L12 TO 92 12 V
L78L12ACZ-TR L78L12 TO 92 12 V
L78L12CD 78L12 SO8 12 V
L78L15ABD 78L15B SO8 15 V
L78L15ABUTR 8L SOT 89 15 V
L78L15ABZ L78L15 TO 92 15 V
L78L15ABZ-AP L78L15 TO 92 15 V
L78L15ACD 78L15A SO8 15 V
L78L15ACUTR 8L SOT 89 15 V
L78L15ACZ L78L15 TO 92 15 V
L78L15ACZ-AP L78L15 TO 92 15 V
L78L15ACZ-TR L78L15 TO 92 15 V
L78L15CD 78L15 SO8 15 V
L78L15CD-TR 78L15A SO8 15 V
L78L18ACUTR 8B SOT 89 18 V
L78L24ABD 78L24B SO8 24 V
L78L24ABUTR 8P SOT 89 24 V
L78L24ABZ-TR L78L24 TO 92 24 V
L78L24ACD 78L24A SO8 24 V
L78L24ACUTR 8P SOT 89 24 V
L78L24ACZ L78L24 TO 92 24 V
L78L24ACZ-AP L78L24 TO 92 24 V
Table 25. Marking information (continued)
L78LxxAB, L78LxxAC, L78LxxC Order codes
Doc ID 2145 Rev 21 31/33
Part numbers Marking Packages Output voltages
L78L24CD 78L24 SO8 24 V
L78L33ABD 78L33B SO8 3.3 V
L78L33ABUTR 8A SOT 89 3.3 V
L78L33ABZ-AP L78L33 TO 92 3.3 V
L78L33ACD 78L33A SO8 3.3 V
L78L33ACD13TR 78L33A SO8 3.3 V
L78L33ACUTR 8A SOT 89 3.3 V
L78L33ACZ L78L33 TO 92 3.3 V
L78L33ACZ-AP L78L33 TO 92 3.3 V
L78L33ACZTR L78L33 TO 92 3.3 V
L78L33CD 78L33 SO8 3.3 V
L78L33CD-TR 78L33 SO8 3.3 V
Table 25. Marking information (continued)
Revision history L78LxxAB, L78LxxAC, L78LxxC
32/33 Doc ID 2145 Rev 21
9 Revision history
Table 26. Document revision history
Date Revision Changes
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.
07-Jun-2007 13 Order codes updated.
18-Sep-2007 14 Added
Ta b le 1
in cover page.
15-Jul-2008 15 Modified:
Table 1 on page 1
and
Table 24 on page 28
.
18-Aug-2008 16 Modified
Figure 12 on page 17
.
03-Apr-2009 17 Added: RthJA value for SOT-89
Table 3 on page 5
.
08-Feb-2011 18 Added note
Table 23 on page 26
21-Feb-2012 19 Modified: SOT-89
Figure 2 on page 4
.
14-Aug-2012 20 Updated TOP value for L78L00AC in
Table 2 on page 5
.
Minor text changes.
07-Sep-2012 21 Added:
Table 25 on page 29
.
L78LxxAB, L78LxxAC, L78LxxC
Doc ID 2145 Rev 21 33/33
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