Output current up to 1.5 A
Output voltages of 5; 6; 8; 8.5; 9; 12; 15; 18;
24 V
Thermal overload protection
Short circuit protection
Output transition SOA protection
2 % output voltage tolerance (A version)
Guaranteed in extended temperature range
(A version)
L78xx, L78xxC,
L78xxAB, L78xxAC
Positive voltage regulator ICs
Datasheet - production data
Description
The L78xx series of three-terminal positive
regulators is available in TO-220, TO-220FP, TO3, D²PAK and DPAK packages and several fixed
output voltages, making it useful in a wide range
of applications.
These regulators can provide local on-card
regulation, eliminating the distribution problems
associated with single point regulation. Each type
employs internal current limiting, thermal shutdown and safe area protection, making it
essentially indestructible. If adequate heat sinking
is provided, they can deliver over 1 A output
current. Although designed primarily as fixed
voltage regulators, these devices can be used
with external components to obtain adjustable
voltage and currents.
Refer to the test circuits , TJ = -55 to 150 °C, VI = 10 V, IO = 500 mA, CI = 0.33 µF,
C
= 0.1 µF unless otherwise specified.
O
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 4. Electrical characteristics of L7805
V
V
V
V
Output voltageTJ = 25°C4.855.2V
O
Output voltageIO = 5 mA to 1 A, VI = 8 to 20 V4.6555.35V
O
(1)
Line regulation
O
(1)
Load regulation
O
Quiescent currentTJ = 25°C6mA
I
d
VI = 7 to 25 V, TJ = 25°C350
= 8 to 12 V, TJ = 25°C125
V
I
I
= 5 mA to 1.5 A, TJ = 25°C100
O
= 250 to 750 mA, TJ = 25°C25
I
O
IO = 5 mA to 1 A0.5
I
V
eNOutput noise voltage B =10 Hz to 100 kHz, T
Quiescent current change
d
/TOutput voltage driftIO = 5 mA0.6mV/°C
O
= 8 to 25 V0.8
V
I
= 25°C40µV/V
J
SVRSupply voltage rejectionVI = 8 to 18 V, f = 120 Hz68dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
VI = 10 V, IO = 1 A, TJ = 0 to 125 °C (L7805AC), TJ = -40 to 125 °C (L7805AB), unless
otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 5. Electrical characteristics of L7805A
V
V
V
V
V
I
SVRSupply voltage rejectionV
V
eNOutput noise voltageT
R
I
I
V
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Output voltageTJ = 25°C4.955.1V
O
Output voltageIO = 5 mA to 1 A, VI = 7.5 to 18 V4.855.2V
O
Output voltageIO = 1 A, VI = 18 to 20 V, TJ = 25°C4.855.2V
VI = 11 V, IO = 1 A, TJ = 0 to 125 °C (L7806AC), TJ = -40 to 125 °C (L7806AB), unless
otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 6. Electrical characteristics of L7806A
V
V
V
V
V
I
SVRSupply voltage rejectionV
V
eNOutput noise voltageT
R
I
I
V
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Output voltageTJ = 25°C5.8866.12V
O
Output voltageIO = 5 mA to 1 A, VI = 8.6 to 19 V5.7666.24V
O
Output voltageIO = 1 A, VI = 19 to 21 V, TJ = 25°C5.7666.24V
VI = 14 V, IO = 1 A, TJ = 0 to 125 °C (L7808AC), TJ = -40 to 125 °C (L7808AB), unless
otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 7. Electrical characteristics of L7808A
V
V
V
V
V
I
Output voltageTJ = 25°C7.8488.16V
O
Output voltageIO = 5 mA to 1 A, VI = 10.6 to 21 V7.788.3V
O
Output voltageIO = 1 A, VI = 21 to 23 V, TJ = 25°C7.788.3V
O
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent current
q
Quiescent current change
q
SVRSupply voltage rejection
V
= 10.6 to 25 V, IO = 500 mA,
I
= 25°C
T
J
= 11 to 17 V1580mV
V
I
= 11 to 17 V, TJ = 25°C540mV
V
I
V
= 10.4 to 23 V, TJ = 25°C1280mV
I
= 5 mA to 1 A25100
I
O
= 5 mA to 1.5 A, TJ = 25°C30100
O
= 250 to 750 mA1050
I
O
T
= 25°C4.36mA
J
1280mV
6mA
V
= 11 to 23 V, IO = 500 mA0.8mA
I
= 10.6 to 23 V, TJ = 25°C0.8mA
V
I
I
= 5 mA to 1 A0.5mA
O
= 11.5 to 21.5 V, f = 120 Hz,
V
I
IO = 500 mA
62dB
mVI
V
eNOutput noise voltageT
R
I
I
V
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
VI = 15 V, IO = 1 A, TJ = 0 to 125 °C (L7809AC), TJ = -40 to 125 °C (L7809AB), unless
otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 8. Electrical characteristics of L7809A
V
V
V
V
V
I
Output voltageTJ = 25°C8.8299.18V
O
Output voltageIO = 5 mA to 1 A, VI = 10.6 to 22 V8.6599.35V
O
Output voltageIO = 1 A, VI = 22 to 24 V, TJ = 25°C8.6599.35V
O
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent current
q
Quiescent current change
q
SVRSupply voltage rejection
V
= 10.6 to 25 V, IO = 500 mA,
I
= 25°C
T
J
= 11 to 17 V1590mV
V
I
= 11 to 17 V, TJ = 25°C545mV
V
I
V
= 11.4 to 23 V, TJ = 25°C1290mV
I
= 5 mA to 1 A25100
I
O
= 5 mA to 1.5 A, TJ = 25°C30100
O
= 250 to 750 mA1050
I
O
T
= 25°C4.36mA
J
1290mV
6mA
V
= 11 to 25 V, IO = 500 mA0.8mA
I
= 10.6 to 23 V, TJ = 25°C0.8mA
V
I
I
= 5 mA to 1 A0.5mA
O
= 11.5 to 21.5 V, f = 120 Hz,
V
I
IO = 500 mA
61dB
mVI
V
eNOutput noise voltageT
R
I
I
V
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
VI = 19 V, IO = 1 A, TJ = 0 to 125 °C (L7812AC), TJ = -40 to 125 °C (L7812AB), unless
otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 9. Electrical characteristics of L7812A
V
V
V
V
V
I
SVRSupply voltage rejectionV
V
eNOutput noise voltageT
R
I
I
V
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Output voltageTJ = 25°C11.751212.25V
O
Output voltageIO = 5 mA to 1 A, VI = 14.8 to 25 V11.51212.5V
O
Output voltageIO = 1 A, VI = 25 to 27 V, TJ = 25°C11.51212.5V
VI = 23 V, IO = 1 A, TJ = 0 to 125 °C (L7815AC), TJ = -40 to 125 °C (L7815AB), unless
otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 10. Electrical characteristics of L7815A
V
V
V
V
V
I
Output voltageTJ = 25°C14.71515.3V
O
Output voltageIO = 5 mA to 1 A, VI = 17.9 to 28 V14.41515.6V
O
Output voltageIO = 1 A, VI = 28 to 30 V, TJ = 25°C14.41515.6V
O
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent current
q
Quiescent current change
q
SVRSupply voltage rejection
V
= 17.9 to 30 V, IO = 500 mA,
I
= 25°C
T
J
= 20 to 26 V16150mV
V
I
= 20 to 26 V, TJ = 25°C675mV
V
I
V
= 17.5 to 30 V, TJ = 25°C13150mV
I
= 5 mA to 1 A25100
I
O
= 5 mA to 1.5 A, TJ = 25°C30100
O
= 250 to 750 mA1050
I
O
T
= 25°C4.46mA
J
13150mV
6mA
V
= 17.5 to 30 V, IO = 500 mA0.8mA
I
= 17.5 to 30 V, TJ = 25°C0.8mA
V
I
I
= 5 mA to 1 A0.5mA
O
= 18.5 to 28.5 V, f = 120 Hz,
V
I
IO = 500 mA
58dB
mVI
V
eNOutput noise voltageT
R
I
I
V
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
VI = 33 V, IO = 1 A, TJ = 0 to 125 °C (L7824AC), TJ = -40 to 125 °C (L7824AB), unless
otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 11. Electrical characteristics of L7824A
V
V
V
V
V
I
SVRSupply voltage rejectionV
V
eNOutput noise voltageT
R
I
I
V
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Output voltageTJ = 25°C23.52424.5V
O
Output voltageIO = 5 mA to 1 A, VI = 27.3 to 37 V232425V
O
Output voltageIO = 1 A, VI = 37 to 38 V, TJ = 25°C232425V
Refer to the test circuits, TJ = 0 to 125 °C, VI = 10 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 12. Electrical characteristics of L7805C
V
V
V
V
V
I
V
eNOutput noise voltage B = 10 Hz to 100 kHz, T
Output voltageTJ = 25°C4.855.2V
O
Output voltageIO = 5 mA to 1 A, VI = 7 to 18 V4.7555.25V
O
Output voltageIO = 1 A, VI = 18 to 20V, TJ = 25°C4.7555.25V
O
V
= 7 to 25 V, TJ = 25°C3100
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent currentTJ = 25°C8mA
d
Quiescent current change
d
/TOutput voltage driftIO = 5 mA-1.1mV/°C
O
I
= 8 to 12 V, TJ = 25°C150
V
I
I
= 5 mA to 1.5 A, TJ = 25°C100
O
= 250 to 750 mA, TJ = 25°C50
I
O
I
= 5 mA to 1 A0.5
O
= 7 to 23 V0.8
V
I
= 25°C40µV/V
J
SVRSupply voltage rejectionVI = 8 to 18 V, f = 120 Hz62dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Refer to the test circuits, TJ = 0 to 125 °C, VI = 1 1 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 13. Electrical characteristics of L7806C
V
V
V
V
V
I
V
eNOutput noise voltageB = 10 Hz to 100 kHz, T
Output voltageTJ = 25°C5.7566.25V
O
Output voltageIO = 5 mA to 1 A, VI = 8 to 19 V5.766.3V
O
Output voltageIO = 1 A, VI = 19 to 21 V, TJ = 25°C5.766.3V
O
V
= 8 to 25 V, TJ = 25°C120
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent currentTJ = 25°C8mA
d
Quiescent current change
d
/TOutput voltage driftIO = 5 mA-0.8mV/°C
O
I
= 9 to 13 V, TJ = 25°C60
V
I
I
= 5 mA to 1.5 A, TJ = 25°C120
O
= 250 to 750 mA, TJ = 25°C60
I
O
I
= 5 mA to 1 A0.5
O
= 8 to 24 V1.3
V
I
= 25°C45µV/V
J
SVRSupply voltage rejectionVI = 9 to 19 V, f = 120 Hz59dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Refer to the test circuits, TJ = 0 to 125 °C, VI = 14 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 14. Electrical characteristics of L7808C
V
V
V
V
V
I
V
eNOutput noise voltage B = 10 Hz to 100 kHz, T
Output voltageTJ = 25°C7.788.3V
O
Output voltageIO = 5 mA to 1 A, VI = 10.5 to 21 V7.688.4V
O
Output voltageIO = 1 A, VI = 21 to 25 V, TJ = 25°C7.688.4V
O
V
= 10.5 to 25 V, TJ = 25°C160
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent currentTJ = 25°C8mA
d
Quiescent current change
d
/TOutput voltage driftIO = 5 mA-0.8mV/°C
O
I
= 11 to 17 V, TJ = 25°C80
V
I
I
= 5 mA to 1.5 A, TJ = 25°C160
O
= 250 to 750 mA, TJ = 25°C80
I
O
I
= 5 mA to 1 A0.5
O
= 10.5 to 25 V1
V
I
= 25°C52µV/V
J
SVRSupply voltage rejectionVI = 11.5 to 21.5 V, f = 120 Hz56dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Refer to the test circuits , TJ = 0 to 125 °C, VI = 14.5 V, IO = 500 mA, CI = 0.33 µF,
C
= 0.1 µF unless otherwise specified.
O
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 15. Electrical characteristics of L7885C
V
V
V
V
V
I
V
eNOutput noise voltage B = 10 Hz to 100 kHz, T
Output voltageTJ = 25°C8.28.58.8V
O
Output voltageIO = 5 mA to 1 A, VI = 11 to 21.5 V8.18.58.9V
O
Output voltageIO = 1 A, VI = 21.5 to 26 V, TJ = 25°C8.18.58.9V
O
V
= 11 to 27 V, TJ = 25°C160
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent currentTJ = 25°C8mA
d
Quiescent current change
d
/TOutput voltage driftIO = 5 mA-0.8mV/°C
O
I
= 11.5 to 17.5 V, TJ = 25°C80
V
I
I
= 5 mA to 1.5 A, TJ = 25°C160
O
= 250 to 750 mA, TJ = 25°C80
I
O
I
= 5 mA to 1 A0.5
O
= 11 to 26 V1
V
I
= 25°C55µV/V
J
SVRSupply voltage rejectionVI = 12 to 22 V, f = 120 Hz56dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Refer to the test circuits, TJ = 0 to 125 °C, VI = 15 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 16. Electrical characteristics of L7809C
V
V
V
V
V
I
V
eNOutput noise voltage B = 10 Hz to 100 kHz, T
Output voltageTJ = 25°C8.6499.36V
O
Output voltageIO = 5 mA to 1 A, VI = 11.5 to 22 V8.5599.45V
O
Output voltageIO = 1 A, VI = 22 to 26 V, TJ = 25°C8.5599.45V
O
V
= 11.5 to 26 V, TJ = 25°C180
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent currentTJ = 25°C8mA
d
Quiescent current change
d
/TOutput voltage driftIO = 5 mA-1mV/°C
O
I
= 12 to 18 V, TJ = 25°C9 0
V
I
I
= 5 mA to 1.5 A, TJ = 25°C180
O
= 250 to 750 mA, TJ = 25°C90
I
O
I
= 5 mA to 1 A0.5
O
= 11.5 to 26 V1
V
I
= 25°C70µV/V
J
SVRSupply voltage rejectionVI = 12 to 23 V, f = 120 Hz55dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Refer to the test circuits, TJ = 0 to 125 °C, VI = 15 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 17. Electrical characteristics of L7810C
V
V
V
V
V
I
V
eNOutput noise voltage B = 10 Hz to 100 kHz, T
Output voltageTJ = 25°C9.61010.4V
O
Output voltageIO = 5 mA to 1 A, VI = 12.5 to 23 V9.51010.5V
O
Output voltageIO = 1 A, VI = 23 to 26 V, TJ = 25°C9.51010.5V
O
V
= 12.5 to 26 V, TJ = 25°C200
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent currentTJ = 25°C8mA
d
Quiescent current change
d
/TOutput voltage driftIO = 5 mA-1mV/°C
O
I
= 13.5 to 19 V, TJ = 25°C100
V
I
I
= 5 mA to 1.5 A, TJ = 25°C200
O
= 250 to 750 mA, TJ = 25°C100
I
O
I
= 5 mA to 1 A0.5
O
= 12.5 to 26 V1
V
I
= 25°C70µV/V
J
SVRSupply voltage rejectionVI = 13 to 23 V, f = 120 Hz55dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Refer to the test circuits, TJ = 0 to 125 °C, VI = 19 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 18. Electrical characteristics of L7812C
V
V
V
V
V
I
V
eNOutput noise voltage B = 10 Hz to 100 kHz, T
Output voltageTJ = 25°C11.51212.5V
O
Output voltageIO = 5 mA to 1 A, VI = 14.5 to 25 V11.41212.6V
O
Output voltageIO = 1 A, VI = 25 to 27 V, TJ = 25°C11.41212.6V
O
V
= 14.5 to 30 V, TJ = 25°C240
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent currentTJ = 25°C8mA
d
Quiescent current change
d
/TOutput voltage driftIO = 5 mA-1mV/°C
O
I
= 16 to 22 V, TJ = 25°C120
V
I
I
= 5 mA to 1.5 A, TJ = 25°C240
O
= 250 to 750 mA, TJ = 25°C120
I
O
I
= 5 mA to 1 A0.5
O
= 14.5 to 30 V1
V
I
= 25°C75µV/V
J
SVRSupply voltage rejectionVI = 15 to 25 V, f = 120 Hz55dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Refer to the test circuits, TJ = 0 to 125 °C, VI = 23 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 19. Electrical characteristics of L7815C
V
V
V
V
V
I
V
eNOutput noise voltage B = 10 Hz to 100kHz, T
Output voltageTJ = 25°C14.41515.6V
O
Output voltageIO = 5 mA to 1 A, VI = 17.5 to 28 V14.251515.75V
O
Output voltageIO = 1 A, VI = 28 to 30 V, TJ = 25°C14.251515.75V
O
V
= 17.5 to 30 V, TJ = 25°C300
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent currentTJ = 25°C8mA
d
Quiescent current change
d
/TOutput voltage driftIO = 5 mA-1mV/°C
O
I
= 20 to 26 V, TJ = 25°C150
V
I
I
= 5 mA to 1.5 A, TJ = 25°C300
O
= 250 to 750 mA, TJ = 25°C150
I
O
I
= 5 mA to 1A0.5
O
= 17.5 to 30 V1
V
I
= 25°C90µV/V
J
SVRSupply voltage rejectionVI = 18.5 to 28.5 V, f = 120 Hz54dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Refer to the test circuits, TJ = 0 to 125 °C, VI = 26 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 20. Electrical characteristics of L7818C
V
V
V
V
V
I
V
eNOutput noise voltage B = 10 Hz to 100 kHz, T
Output voltageTJ = 25°C17.31818.7V
O
Output voltageIO = 5 mA to 1 A, VI = 21 to 31 V17.11818.9V
O
Output voltageIO = 1 A, VI = 31 to 33 V, TJ = 25°C17.11818.9V
O
V
= 21 to 33 V, TJ = 25°C360
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent currentTJ = 25°C8mA
d
Quiescent current change
d
/TOutput voltage driftIO = 5 mA-1mV/°C
O
I
= 24 to 30 V, TJ = 25°C180
V
I
I
= 5 mA to 1.5 A, TJ = 25°C360
O
= 250 to 750 mA, TJ = 25°C180
I
O
I
= 5 mA to 1 A0.5
O
= 21 to 33 V1
V
I
= 25°C110µV/V
J
SVRSupply voltage rejectionVI = 22 to 32 V, f = 120 Hz53dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Refer to the test circuits, TJ = 0 to 125 °C, VI = 28 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 21. Electrical characteristics of L7820C
V
V
V
V
V
I
V
eNOutput noise voltage B = 10 Hz to 100 kHz, T
Output voltageTJ = 25°C19.22020.8V
O
Output voltageIO = 5 mA to 1 A, VI = 23 to 33 V192021V
O
Output voltageIO = 1 A, VI = 33 to 35 V, TJ = 25°C192021V
O
V
= 22.5 to 35 V, TJ = 25°C400
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent currentTJ = 25°C8mA
d
Quiescent current change
d
/TOutput voltage driftIO = 5 mA-1mV/°C
O
I
= 26 to 32 V, TJ = 25°C200
V
I
I
= 5 mA to 1.5 A, TJ = 25°C400
O
= 250 to 750 mA, TJ = 25°C200
I
O
I
= 5 mA to 1 A0.5
O
= 23 to 35 V1
V
I
= 25°C150µV/V
J
SVRSupply voltage rejectionVI = 24 to 35 V, f = 120 Hz52dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Refer to the test circuits, TJ = 0 to 125 °C, VI = 33 V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF
unless otherwise specified.
SymbolParameterTest conditionsMin.Typ.Max.Unit
Table 22. Electrical characteristics of L7824C
V
V
V
V
V
I
V
eNOutput noise voltage B = 10 Hz to 100 kHz, T
Output voltageTJ = 25°C232425V
O
Output voltageIO = 5 mA to 1 A, VI = 27 to 37 V22.82425.2V
O
Output voltageIO = 1 A, VI = 37 to 38 V, TJ = 25°C22.82425.2V
O
V
= 27 to 38 V, TJ = 25°C480
(1)
Line regulation
O
(1)
Load regulation
O
I
Quiescent currentTJ = 25°C8mA
d
Quiescent current change
d
/TOutput voltage driftIO = 5 mA-1.5mV/°C
O
I
= 30 to 36 V, TJ = 25°C240
V
I
I
= 5 mA to 1.5 A, TJ = 25°C480
O
= 250 to 750 mA, TJ = 25°C240
I
O
I
= 5 mA to 1 A0.5
O
= 27 to 38 V1
V
I
= 25°C170µV/V
J
SVRSupply voltage rejectionVI = 28 to 38 V, f = 120 Hz50dB
V
R
I
I
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
The L78xx Series of fixed voltage regulators are designed with thermal overload protection
that shuts down the circuit when subjected to an excessive power overload condition,
internal short-circuit protection that limits the maximum current the circuit will pass, and
output transistor safe-area compensation that reduces the output short-circuit current as the
voltage across the pass transistor is increased. In many low current applications,
compensation capacitors are not required. However, it is recommended that the regulator
input be bypassed with capacitor if the regulator is connected to the power supply filter with
long lengths, or if the output load capacitance is large. An input bypass capacitor should be
selected to provide good high frequency characteristics to insure stable operation under all
load conditions. A 0.33 µF or larger tantalum, mylar or other capacitor having low internal
impedance at high frequencies should be chosen. The byp ass capacitor shou ld be mounted
with the shortest possible leads directly across the regulators input terminals. Normally good
construction techniques should be used to minimize ground loop s and lead resist ance drops
since the regulator has no external sense lead.
The addition of an operational amplifier allows adjustment to higher or intermediate values
while retaining regulation characteristics. The minimum voltag e obtained with the
arrangement is 2 V greater than the regulator voltage.
The circuit of Figure 13 can be modified to provide supply protection against short circuit by
adding a short circuit sense resistor, RSC, and an additional PNP transistor. The current
sensing PNP must be able to handle the short circuit current of the three terminal regulator
Therefore a four ampere plastic power transistor is specified.
Figure 8. Fixed output regulator
1. To specify an output voltage, substitute voltage value for "XX".
2. Although no output capacitor is need for stability, it does improve transient response.
3. Required if regulator is locate an appreciable distance from power supply filter.
28/57DocID2143 Rev 31
Page 29
L78xx, L78xxC, L78xxAB, L78xxAC Application information
IO = VXX/R1+I
d
IR1 5 I
d
VO = VXX(1+R2/R1)+IdR
2
Figure 10. Circuit for increasing output voltage
Figure 9. Current regulator
Figure 11. Adjustable output regulator (7 to 30 V)
Figure 28. Protection against input short-circuit with high capacitance loads
Note:Application with high capacitance loads and an output voltage greater than 6 volts need an
external diode (see Figure 23 on p age 34) to protect the device against input short circuit. In
this case the input voltage falls rapidly while the output voltage decrease slowly. The
capacitance discharges by means of the base-emitter junction of the series pass tr ansistor
in the regulator. If the energy is sufficiently high, the transistor may be destroyed. The
external diode by-passes the current from the IC to ground.
Figure 35. Load transient responseFigure 36. Line transient response
Figure 37. Quiescent current vs. input voltage
38/57DocID2143 Rev 31
Page 39
L78xx, L78xxC, L78xxAB, L78xxAC Package mechanical data
8 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
Table 23. TO-220 mechanical data
Type STD - ST Dual GaugeType STD - ST Single Gauge
Dim.
Min.Typ.Max.Min.Typ.Max.
A4.404.604.404.60
b0.610.880.610.88
b11.141.701.141.70
c0.480.700.480.70
D15.2515.7515.2515.75
D11.27
E10.0010.4010.0010.40
mm.mm.
e2.402.702.402.70
e14.955.154.955.15
F1.231.320.510.60
H16.206.606.206.60
J12.402.722.402.72
L13.0014.0013.0014.00
L13.503.933.503.93
L2016.4016.40
L3028.9028.90
P3.753.853.753.85
Q2.652.952.652.95
In spite of some difference in tolerances, the packages are compatible.
Figure 49. Drawing dimension tape and reel for D²PAK
DocID2143 Rev 3153/57
Page 54
Order codesL78xx, L78xxC, L78xxAB, L78xxAC
9 Order codes
T able 31. Order codes
Order codes
Part
numbers
TO-220DPAKD²PAKTO-220FPTO-3
L7805L7805T5 V
Output
voltages
L7805C
L7805CV-DG
(1)
5 V
L7805ABVL7805ABD2T-TRL7805ABP5 V
L7805CVL7805CDT-TRL7805CD2T-TRL7805CPL7805CT5 V
L7805AB
L7805ABV-DG
(1)
5 V
L7805ACVL7805ACD2T-TRL7805ACP5 V
L7805AC
L7805ACV-DG
(1)
5 V
L7806CVL7806CD2T-TRL7806CT6 V
L7806C
L7806CV-DG
(1)
6 V
L7806ABVL7806ABD2T-TR6 V
L7806AB
L7806ABV-DG
(1)
6 V
L7806ACV6 V
L7806AC
L7806ACV-DG
(1)
6 V
L7808CVL7808CD2T-TR8 V
L7808C
L7808CV-DG
(1)
8 V
L7808ABVL7808ABD2T-TR8 V
L7808AB
L7808ABV-DG
(1)
8 V
L7808ACL7808ACV8 V
L7808ACV-DG
(1)
L7885CL7885CVL7885CD2T-TR
(2)
L7885CP
(2)
L7885CT
(2)
8 V
8.5 V
L7809CVL7809CD2T-TRL7809CP9 V
L7809C
L7809CV-DG
(1)
9 V
L7809ABL7809ABVL7809ABD2T-TR9 V
L7809ACL7809ACV9 V
L7812C
L7812CV-DG
(1)
L7812ABVL7812ABD2T-TR12 V
L7812CVL7812CD2T-TRL7812CPL7812CT12 V
L7812AB
L7812ABV-DG
(1)
L7812ACVL7812ACD2T-TR12 V
L7812AC
L7812ACV-DG
(1)
54/57DocID2143 Rev 31
12 V
12 V
12 V
Page 55
L78xx, L78xxC, L78xxAB, L78xxAC Order codes
T able 31. Order codes
Order codes
Part
numbers
TO-220DPAKD²PAKTO-220FPTO-3
Output
voltages
L7815C
L7815CVL7815CD2T-TRL7815CPL7815CT15 V
L7815CV-DG
L7815ABVL7815ABD2T-TR15 V
L7815AB
L7815ABV-DG
L7815ACVL7815ACD2T-TR15 V
L7815AC
L7815ACV-DG
L7818CVL7818CD2T-TR
L7818C
L7818CV-DG
L7824CVL7824CD2T-TRL7824CPL7824CT24 V
L7824C
L7824CV-DG
L7824ABV24 V
L7824AB
L7824ABV-DG
L7824ACV24 V
L7824AC
L7824ACV-DG
1. TO-220 Dual Gauge frame.
2. Available on request.
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
15 V
15 V
15 V
L7818CT18 V
18 V
24 V
24 V
24 V
DocID2143 Rev 3155/57
Page 56
Revision historyL78xx, L78xxC, L78xxAB, L78xxAC
10 Revision history
Table 32. Document revision history
DateRevisionChanges
21-Jun-200412Document updating.
03-Aug-200613Order codes has been updated and new template.
19-Jan-200714D²PAK mechanical data has been updated and add footprint data.
31-May-200715Order codes has been updated.
29-Aug-200716Added Table 1 in cover page.
11-Dec-200717Modified: Table 31.
06-Feb-200818
Added: TO-220 mechanical data Figure 38 on page 40 , Figure 39 on page 41,
and Table 23 on page 39. Modified: Table 31 on page 54.
18-Mar-200819
26-Jan-201020
04-Mar-201021Added notes Figure 38 on page 40.
08-Sep-201022Modified Table 31 on page 54.
23-Nov-201023Added: T
16-Sep-201124Modified title on page 1.
30-Nov-201125
08-Feb-201226
27-Mar-201227Added: order codes L7812ABV-DG, L7815ABV-DG Table 31 on page 54.
27-Apr-201228
10-May-201229
19-Sep-201230Modified load regulation units from V to mV in Table 5 to Table 11.
Added: Table 26: D PAK mechanical data on page 47, Table 27: Tape and reel
DPAK mechanical data on page 48. Modified: Table 31 on page 54.
Modified Table1 on page 1 and Table 23 on p a g e39, added: Figure 38 on
page 40 and Figure 39 on page 41, Figure 40 on page 42 and Figure 41 on
page 42.
= 25 °C test condition in VO on Table 5, 6, 7, 8, 9, 10 and Table 11.
J
Added: order codes L7805CV-DG , L7806CV -DG, L7808ABV-DG , L7812CV -DG
and L7815CV-DG Table 31 on page 54.
Added: order codes L7805ACV-DG, L7805ABV-DG, L7806ABV-DG, L7808CVDG, L7809CV-DG, L7812ACV-DG, L7818CV-DG, L7824CV-DG Table 31 on
page 54.
Modified: V
Line regulation Table8 on page 13.
Added: order codes L7806ACV-DG, L7808ACV-DG, L7815ACV-DG,
L7824ABV-DG and L7824ACV-DG Table 31 on page 54.
= 10.4 to 23 V ==> VI = 11.4 to 23 V test conditon value
I
12-Mar-201331Modified: V
56/57DocID2143 Rev 31
output voltage at 25 °C min. value 14.4 V Table 19 on page 24.
O
Page 57
L78xx, L78xxC, L78xxAB, L78xxAC
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