L7800AB/AC
SERIES
PRECISION 1A REGULATORS
November 1999
OUTPUT CURRENT INEXCESS OF1 A
OUTPUT VOLTAGESOF 5;6; 8; 9; 12; 15;18;
20;24V
THERMAL OVERLOADPROTECTION
OUTPUT TRANSITION SOAPROTECTION
2%OUTPUT VOLTAGETOLERANCE
GUARANTEED IN EXTENDED
TEMPERATURE RANGE
DESCRIPTION
The L7800A series of three-terminal positive
regulators is available in TO-220 and D2PAK
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 shut-down and safe area protection,
making it essentially indestructible. If adequate
heat sinking is provided, they can deliver over 1A
output current. Although designed primarily as
fixed voltage regulators, these devices can be
used with external components to obtain
adjustablevoltages and currents. TO-220
D2PAK
BLOCKDIAGRAM
1/17
CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)
TO-220 D2PAK
THERMALDATA
Symbol Parameter D2PAK TO-220 Unit
Rthj-case
Rthj-amb Thermal Resistance Junction-case Max
Thermal Resistance Junction-ambient Max 3
62.5 3
50
oC/W
oC/W
Type TO-220 D2PAK (*) Output Voltage
L7805AB
L7805AC
L7806AB
L7806AC
L7808AB
L7808AC
L7809AB
L7809AC
L7812AB
L7812AC
L7815AB
L7815AC
L7818AB
L7818AC
L7820AB
L7820AC
L7824AB
L7824AC
L7805ABV
L7805ACV
L7806ABV
L7806ACV
L7808ABV
L7808ACV
L7809ABV
L7809ACV
L7812ABV
L7812ACV
L7815ABV
L7815ACV
L7818ABV
L7818ACV
L7820ABV
L7820ACV
L7824ABV
L7824ACV
L7805ABD2T
L7805ACD2T
L7806ABD2T
L7806ACD2T
L7808ABD2T
L7808ACD2T
L7809ABD2T
L7809ACD2T
L7812ABD2T
L7812ACD2T
L7815ABD2T
L7815ACD2T
5V
5V
6V
6V
8V
8V
9V
9V
12V
12V
15V
15V
18V
18V
24V
24V
(*) AVAILABLEIN TAPE AND REEL WITH ”-TR” SUFFIX
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
ViDC InputVoltage (for VO= 5 to 18V)
(forVO= 20,24V) 35
40 V
V
IoOutputCurrent Internally limited
Ptot Power Dissipation Internally limited
Top Operating Junction Temperature Range(for L7800AC)
(for L7800AB)0to150
-40 to 125
oC
oC
Tstg StorageTemperature Range - 65 to 150 oC
L7800AB/AC
2/17
APPLICATION CIRCUIT
SCHEMATIC DIAGRAM
L7800AB/AC
3/17
TESTCIRCUITS
Figure 3 : Ripple Rejection.
Figure 2 : Load Regulation.Figure 1 : DC Parameter
L7800AB/AC
4/17
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7805A(Vi= 10V,Io= 1 A, Tj= 0 to 125 oC (L7805AC),
Tj= -40 to 125 oC (L7805AB)unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VoOutputVoltage Tj=25o
C 4.955.1V
V
o
OutputVoltage Io= 5 mA to 1 A Po15 W
Vi= 7.5to 20 V 4.855.2V
V
o
* LineRegulation Vi= 7.5to 25 V Io= 500mA
Vi= 8 to12 V
Vi= 8 to12 V Tj=25o
C
Vi= 7.3to 20 V Tj=25o
C
7
10
2
7
50
5
25
50
mV
mV
mV
mV
Vo* LoadRegulation Io= 5 mA to 1 A
Io= 5 mA to 1.5 A Tj=25o
C
I
o= 250 to 750mA
25
30
8
100
100
50
mV
mV
mV
IdQuiescentCurrent Tj=25o
C4.36
6
mA
IdQuiescentCurrent Change Vi= 8 to25 V Io= 500mA
Vi= 7.5to 20 V Tj=25o
C
I
o= 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
SVR Supply Voltage Rejection Vi= 8 to18 V f= 120Hz
Io= 500 mA 68 dB
VdDropout Voltage Io=1A Tj=25o
C2V
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC10µV/Vo
RoOutputResistance f = 1KHz 17 m
Isc Short Circuit Current Vi=35V T
amb =25o
C0.2A
I
scp Short Circuit Peack Current Tj=25o
C2.2A
V
o
T
OutputVoltageDrift -1.1 mV/oC
L7800AB/AC
5/17
ELECTRICAL CHARACTERISTICS FOR L7806A(Vi= 11V,Io= 1 A, Tj= 0 to 125 oC (L7806AC),
Tj= -40 to 125 oC (L7806AB)unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VoOutputVoltage Tj=25o
C5.8866.12V
V
o
OutputVoltage Io= 5 mA to 1 A Po15 W
Vi= 8.6to 21 V 5.76 6 6.24 V
Vo* LineRegulation Vi= 8.6to 25 V Io= 500mA
Vi= 9 to13 V
Vi= 9 to13 V Tj=25o
C
Vi= 8.3to 21 V Tj=25o
C
9
11
3
9
60
60
30
60
mV
mV
mV
mV
Vo* LoadRegulation Io= 5 mA to 1 A
Io= 5 mA to 1.5 A Tj=25o
C
I
o= 250 to 750mA
25
30
10
100
100
50
mV
mV
mV
IdQuiescentCurrent Tj=25o
C4.36
6
mA
IdQuiescentCurrent Change Vi= 9 to25 V Io= 500mA
Vi= 8.6to 21 V Tj=25o
C
I
o= 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
SVR Supply Voltage Rejection Vi= 9 to19 V f= 120Hz
Io= 500 mA 65 dB
VdDropout Voltage Io=1A Tj=25o
C2V
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC10
µ
V/Vo
RoOutputResistance f = 1KHz 17 m
Isc Short Circuit Current Vi=35V T
amb =25o
C0.2A
I
scp Short Circuit Peack Current Tj=25o
C2.2A
V
o
T
OutputVoltageDrift -0.8 mV/oC
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
L7800AB/AC
6/17
ELECTRICAL CHARACTERISTICS FOR L7808A(Vi= 14V,Io= 1 A, Tj= 0 to 125 oC (L7808AC),
Tj= -40 to 125 oC (L7808AB)unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VoOutputVoltage Tj=25o
C7.8488.16V
V
o
OutputVoltage Io= 5 mA to 1 A Po15 W
Vi= 10.6to 23V 7.788.3V
V
o
* LineRegulation Vi= 10.6to 25V Io=500 mA
Vi=11to17V
V
i=11to17V T
j=25o
C
V
i= 10.4to 23V Tj=25o
C
12
15
5
12
80
80
40
80
mV
mV
mV
mV
Vo* LoadRegulation Io= 5 mA to 1 A
Io= 5 mA to 1.5 A Tj=25o
C
I
o= 250 to 750mA
25
30
10
100
100
50
mV
mV
mV
IdQuiescentCurrent Tj=25o
C4.36
6
mA
IdQuiescentCurrent Change Vi=11to25V I
o=500mA
Vi= 10.6to 23V Tj=25o
C
I
o= 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
SVR Supply Voltage Rejection Vi= 11.5to 21.5 V f =120 Hz
Io= 500 mA 62 dB
VdDropout Voltage Io=1A Tj=25o
C2V
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC10
µ
V/Vo
RoOutputResistance f = 1KHz 18 m
Isc Short Circuit Current Vi=35V T
amb =25o
C0.2A
I
scp Short Circuit Peack Current Tj=25o
C2.2A
V
o
T
OutputVoltageDrift -0.8 mV/oC
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
L7800AB/AC
7/17
ELECTRICAL CHARACTERISTICS FOR L7809A(Vi= 15V,Io= 1 A, Tj= 0 to 125 oC (L7809AC),
Tj= -40 to 125 oC (L7809AB)unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VoOutputVoltage Tj=25o
C8.8299.18V
V
o
OutputVoltage Io= 5 mA to 1 A Po15 W
Vi= 10.6to 23V 8.65 9 9.35 V
Vo* LineRegulation Vi= 10.6to 25V Io=500 mA
Vi=11to17V
V
i=11to17V T
j=25o
C
V
i= 10.4to 23V Tj=25o
C
12
15
5
12
90
90
45
90
mV
mV
mV
mV
Vo* LoadRegulation Io= 5 mA to 1 A
Io= 5 mA to 1.5 A Tj=25o
C
I
o= 250 to 750mA
25
30
10
100
100
50
mV
mV
mV
IdQuiescentCurrent Tj=25o
C4.36
6
mA
IdQuiescentCurrent Change Vi=11to25V I
o=500mA
Vi= 10.6to 23V Tj=25o
C
I
o= 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
SVR Supply Voltage Rejection Vi= 11.5to 21.5 V f =120 Hz
Io= 500 mA 61 dB
VdDropout Voltage Io=1A Tj=25o
C2V
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC10
µ
V/Vo
RoOutputResistance f = 1KHz 18 m
Isc Short Circuit Current Vi=35V T
amb =25o
C0.2A
I
scp Short Circuit Peack Current Tj=25o
C2.2A
V
o
T
OutputVoltageDrift -0.8 mV/oC
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
L7800AB/AC
8/17
ELECTRICAL CHARACTERISTICS FOR L7812A(Vi= 19V,Io= 1 A, Tj= 0 to 125 oC (L7812AC),
Tj= -40 to 125 oC (L7812AB)unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VoOutputVoltage Tj=25o
C 11.75 12 12.25 V
VoOutputVoltage Io= 5 mA to 1 A Po15 W
Vi= 14.8to 27V 11.5 12 12.5 V
Vo* LineRegulation Vi= 14.8to 30V Io=500 mA
Vi=16to22V
V
i=16to22V T
j=25o
C
V
i= 14.5to 27V Tj=25o
C
13
16
6
13
120
120
60
120
mV
mV
mV
mV
Vo* LoadRegulation Io= 5 mA to 1 A
Io= 5 mA to 1.5 A Tj=25o
C
I
o= 250 to 750mA
25
30
10
100
100
50
mV
mV
mV
IdQuiescentCurrent Tj=25o
C4.46
6
mA
IdQuiescentCurrent Change Vi=15to30V I
o=500mA
Vi= 14.8to 27V Tj=25o
C
I
o= 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
SVR Supply Voltage Rejection Vi= 15 to 25 V f= 120Hz
Io= 500 mA 60 dB
VdDropout Voltage Io=1A Tj=25o
C2V
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC10
µ
V/Vo
RoOutputResistance f = 1KHz 18 m
Isc Short Circuit Current Vi=35V T
amb =25o
C0.2A
I
scp Short Circuit Peack Current Tj=25o
C2.2A
V
o
T
OutputVoltageDrift -1 mV/oC
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
L7800AB/AC
9/17
ELECTRICAL CHARACTERISTICS FOR L7815A(Vi= 23V,Io= 1 A, Tj= 0 to 125 oC (L7815AC),
Tj= -40 to 125 oC (L7815AB)unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VoOutputVoltage Tj=25o
C 14.7 15 15.3 V
VoOutputVoltage Io= 5 mA to 1 A Po15 W
Vi= 17.9to 30V 14.4 15 15.6 V
Vo* LineRegulation Vi= 17.9to 30V Io=500 mA
Vi=20to26V
V
i=20to26V T
j=25o
C
V
i= 17.5to 30V Tj=25o
C
13
16
6
13
150
150
75
150
mV
mV
mV
mV
Vo* LoadRegulation Io= 5 mA to 1 A
Io= 5 mA to 1.5 A Tj=25o
C
I
o= 250 to 750mA
25
30
10
100
100
50
mV
mV
mV
IdQuiescentCurrent Tj=25o
C4.46
6
mA
IdQuiescentCurrent Change Vi= 17.5to 30V Io=500mA
V
i= 17.5to 30V Tj=25o
C
I
o= 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
SVR Supply Voltage Rejection Vi= 18.5to 28.5 V f =120 Hz
Io= 500 mA 58 dB
VdDropout Voltage Io=1A Tj=25o
C2V
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC10
µ
V/Vo
RoOutputResistance f = 1KHz 19 m
Isc Short Circuit Current Vi=35V T
amb =25o
C0.2A
I
scp Short Circuit Peack Current Tj=25o
C2.2A
V
o
T
OutputVoltageDrift -1 mV/oC
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
L7800AB/AC
10/17
ELECTRICAL CHARACTERISTICS FOR L7818A(Vi= 27V,Io= 1 A, Tj= 0 to 125 oC (L7818AC),
Tj= -40 to 125 oC (L7818AB)unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VoOutputVoltage Tj=25o
C 17.64 18 18.36 V
VoOutputVoltage Io= 5 mA to 1 A Po15 W
Vi=21to33V 17.3 18 18.7 V
Vo* LineRegulation Vi=21to33V I
o=500mA
Vi=24to30V
V
i=24to30V T
j=25o
C
V
i= 20.6to 33V Tj=25o
C
25
28
10
5
180
180
90
180
mV
mV
mV
mV
Vo* LoadRegulation Io= 5 mA to 1 A
Io= 5 mA to 1.5 A Tj=25o
C
I
o= 250 to 750mA
25
30
10
100
100
50
mV
mV
mV
IdQuiescentCurrent Tj=25o
C4.56
6
mA
IdQuiescentCurrent Change Vi=21to33V I
o=500mA
Vi=21to33V T
j=25o
C
I
o= 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
SVR Supply Voltage Rejection Vi= 22 to 32 V f= 120Hz
Io= 500 mA 57 dB
VdDropout Voltage Io=1A Tj=25o
C2V
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC10
µ
V/Vo
RoOutputResistance f = 1KHz 19 m
Isc Short Circuit Current Vi=35V T
amb =25o
C0.2A
I
scp Short Circuit Peack Current Tj=25o
C2.2A
V
o
T
OutputVoltageDrift -1 mV/oC
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
L7800AB/AC
11/17
ELECTRICAL CHARACTERISTICS FOR L7820A(Vi= 28V,Io= 1 A, Tj= 0 to 125 oC (L7820AC),
Tj= -40 to 125 oC (L7820AB)unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VoOutputVoltage Tj=25o
C 19.6 20 20.4 V
VoOutputVoltage Io= 5 mA to 1 A Po15 W
Vi=23to35V 19.2 20 20.8 V
Vo* LineRegulation Vi=23to35V I
o=500mA
Vi=26to32V
V
i=26to32V T
j=25o
C
V
i=23to32V T
j=25o
C
200
200
100
200
mV
mV
mV
mV
Vo* LoadRegulation Io= 5 mA to 1 A
Io= 5 mA to 1.5 A Tj=25o
C
I
o= 250 to 750mA
25
30
10
100
100
50
mV
mV
mV
IdQuiescentCurrent Tj=25o
C4.56
6
mA
IdQuiescentCurrent Change Vi=23to35V I
o=500mA
Vi=23to35V T
j=25o
C
I
o= 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
SVR Supply Voltage Rejection Vi= 24 to 35 V f= 120Hz
Io= 500 mA 56 dB
VdDropout Voltage Io=1A Tj=25o
C2V
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC10
µ
V/Vo
RoOutputResistance f = 1KHz 20 m
Isc Short Circuit Current Vi=35V T
amb =25o
C0.2A
I
scp Short Circuit Peack Current Tj=25o
C2.2A
V
o
T
OutputVoltageDrift -1 mV/oC
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
L7800AB/AC
12/17
ELECTRICAL CHARACTERISTICS FOR L7824A(Vi= 33V,Io= 1 A, Tj= 0 to 125 oC (L7824AC),
Tj= -40 to 125 oC (L7824AB)unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VoOutputVoltage Tj=25o
C 23.5 24 24.5 V
VoOutputVoltage Io= 5 mA to 1 A Po15 W
Vi= 27.3to 38V 23 24 25 V
Vo* LineRegulation Vi=27to38V I
o=500mA
Vi=30to36V
V
i=30to36V T
j=25o
C
V
i= 26.7to 38V Tj=25o
C
31
35
14
31
240
240
120
240
mV
mV
mV
mV
Vo* LoadRegulation Io= 5 mA to 1 A
Io= 5 mA to 1.5 A Tj=25o
C
I
o= 250 to 750mA
25
30
10
100
100
50
mV
mV
mV
IdQuiescentCurrent Tj=25o
C4.66
6
mA
IdQuiescentCurrent Change Vi= 27.3to 38V Io=500mA
V
i= 27.3to 38V Tj=25o
C
I
o= 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
SVR Supply Voltage Rejection Vi= 28 to 38 V f= 120Hz
Io= 500 mA 54 dB
VdDropout Voltage Io=1A Tj=25o
C2V
e
N
Output Noise Voltage B = 10Hz to 100KHz Tj=25oC10
µ
V/Vo
RoOutputResistance f = 1KHz 20 m
Isc Short Circuit Current Vi=35V T
amb =25o
C0.2A
I
scp Short Circuit Peack Current Tj=25o
C2.2A
V
o
T
OutputVoltageDrift -1.5 mV/oC
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
L7800AB/AC
13/17
APPLICATIONS INFORMATION
DESIGNCONSIDERATIONS
The L7800ASeries of fixed voltage regulatorsare
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-AreaCompensation that reduces the output
short-circuit current as the voltage across the
passtransistoris increased.
In many low current applications, compensation
capacitors are not required. However, it is
recommended that the regulator input be
bypassed with a capacitor if the regulator is
connected to the power supply filter with long
wire 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 0.33µF or larger tantalum,
mylar, or other capacitor having low internal
impedance at high frequenciesshouldbe chosen.
The bypasscapacitor should be mounted with the
shortest possible leads directly across the
regulators input terminals. Normally good
construction techniques should be used to
minimize ground loops and lead resistance drops
since the regulatorhas no externalsense lead.
Figure 4 : Current Regulator. Figure 5 : AdjustableOutput Regulator.
Figure 6 : Current Boost Regulator. Figure 7 : Short-circuit Protection.
VO, 7.0V to 20V
Vi–V
O
2.0V
The addition of an operational amplifier allows
adjustmentto higher or intermediate values while
retaining regulation characteristics. The minimum
voltage obtainable with this arrangement is 2.0V
greaterthanthe regulatorvoltage.
The circuit of figure 6 can be modified to provide
supply protectionagainst short circuit by adding a
short-circuit sense resistor, Rsc, and an additional
PNP transistor.The currentsensing PNP must be
able to handle the short-circuit current of the
three-terminal regulator. Therefore, a
four-ampereplasticpower transistor is specified.
R1=
V
BEQ
1
I
REQ
I
Q
1
β
Q
1
IO=
I
REG
+
Q
1(
I
REG
V
BEQ
1
R
1)
IO=
V
XX
R
1+
I
d
L7800AB/AC
14/17
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.40 4.60 0.173 0.181
C 1.23 1.32 0.048 0.051
D 2.40 2.72 0.094 0.107
D1 1.27 0.050
E 0.49 0.70 0.019 0.027
F 0.61 0.88 0.024 0.034
F1 1.14 1.70 0.044 0.067
F2 1.14 1.70 0.044 0.067
G 4.95 5.15 0.194 0.203
G1 2.4 2.7 0.094 0.106
H2 10.0 10.40 0.393 0.409
L2 16.4 0.645
L4 13.0 14.0 0.511 0.551
L5 2.65 2.95 0.104 0.116
L6 15.25 15.75 0.600 0.620
L7 6.2 6.6 0.244 0.260
L9 3.5 3.93 0.137 0.154
DIA. 3.75 3.85 0.147 0.151
L6
A
C
D
E
D1
F
G
L7
L2
Dia.
F1
L5
L4
H2
L9
F2
G1
TO-220 MECHANICAL DATA
P011C
L7800AB/AC
15/17
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.4 4.6 0.173 0.181
A1 2.49 2.69 0.098 0.106
B 0.7 0.93 0.027 0.036
B2 1.14 1.7 0.044 0.067
C 0.45 0.6 0.017 0.023
C2 1.23 1.36 0.048 0.053
D 8.95 9.35 0.352 0.368
E 10 10.4 0.393 0.409
G 4.88 5.28 0.192 0.208
L 15 15.85 0.590 0.624
L2 1.27 1.4 0.050 0.055
L3 1.4 1.75 0.055 0.068
L2 L3
L
B2 B
G
E
A
C2
D
C
A1
DETAIL”A” DETAIL”A”
A2
P011P6/F
TO-263 (D2PAK) MECHANICAL DATA
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