L7800AB/AC
SERIES
PRECISION 1A REGULATORS
s
s
s
s
s
s
OUTPUT CURRENT IN EXCESS OF 1A
OUTPUT VOLTAGES OF 5; 6; 8; 9; 12; 15;
18; 20; 24V
THERMAL OVERLOAD PROTECTION
OUTPUT TRANSITION SOA PROTECTION
2% OUTPUT VOLTAGE TOLERANCE
GUARANTEED IN EXTENDED
TEMPERATURE RANGE
TO-220
TO-220FP
DESCRIPTION
The L7800A series of three terminal positive
regulators is available in TO-220, TO-220FP and
D
2
PAK 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
problem associated with single point regulation.
Each type employs internal current limiting,
thermal shut-down and safe area protection,
making it essentially indestructible. If adeguate
heat sinking is provided, they can deliver over 1A
D
2
PAK
output current, Although designed primarily as
fixed voltage regulators, these devices can be
used with external components to obtain
adjustable voltage and currents.
SCHEMATIC DIAGRAM
October 2001
1/18
L7800AB/AC SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
V
I
I
O
P
D
T
stg
T
op
DC Input Voltage
Output Current
Power Dissipation
Storage Temperature Range
Operating Junction Temperature Range (for
L7800AC)
(for
L7800AB)
(for
(for
Parameter
V
O
= 5 to 18V)
V
O
= 20, 24V)
Value
35
40
Internally Limited
Internally Limited
-65 to +150
0 to +150
-40 to +125
Unit
V
V
mA
mW
°C
°C
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
THERMAL DATA
Symbol
R
thj-case
R
thj-amb
Parameter
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
TO-220
3
50
TO-220FP
5
60
D
2
PAK
3
62.5
Unit
°C/W
°C/W
SHEMATIC DIAGRAM
2/18
L7800AB/AC SERIES
ELECTRICAL CHARACTERISTICS OF L7805A
(V
I
=10V, I
O
=1A, T
J
= 0 to 150°C (L7805AC),
T
J
= -40 to 125°C (L7805AB), unless otherwise specified.)
Symbol
V
O
V
O
Parameter
Output Voltage
Output Voltage
T
J
= 25°C
I
O
= 5mA to 1A
V
I
= 7.5 to 20V
V
I
= 7.5 to 25V
V
I
= 8 to 12V
V
I
= 8 to 12V
V
I
= 7.3 to 20V
∆V
O
(*)
Load Regulation
I
O
= 5mA to 1A
I
O
= 5mA to 1.5A
I
O
= 250 to 750mA
I
q
∆I
q
Quiescent Current
Quiescent Current Change
T
J
= 25°C
V
I
= 8 to 25V
V
I
= 7.5 to 20V
I
O
= 5mA to 1A
SVR
V
d
eN
R
O
I
sc
I
scp
Supply Voltage Rejection
Dropout Voltage
Output Noise Voltage
Output Resistance
Short Circuit Current
Short Circuit Peak Current
V
I
= 8 to 18V
I
O
= 500mA
I
O
= 1A
T
A
= 25°C
f =1KHz
V
I
= 35V
T
J
= 25°C
T
A
= 25°C
f = 120Hz
T
J
= 25°C
B =10Hz to 100KHz
68
2
10
17
0.2
2.2
-1.1
I
O
= 500 mA
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
P
O
≤
15W
I
O
= 500 mA
Test Conditions
Min.
4.9
4.8
Typ.
5
5
7
10
2
7
25
30
8
4.3
Max.
5.1
5.2
50
50
25
50
100
100
50
6
6
0.8
0.8
0.5
Unit
V
V
mV
mV
mV
mV
mV
V
V
mA
mA
mA
mA
mA
dB
V
µV/V
O
mΩ
A
A
mv/°C
∆V
O
(*) Line Regulation
∆V
O
/∆T Output Voltage Drift
(*) Load and Line Regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
5/18
PCB Design
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