L7800AB/AC
SERIES
PRECISION 1A REGULATORS
November 1999
s
OUTPUT CURRENT IN EXCESS OF 1 A
s
OUTPUT VOLTAGES OF 5; 6; 8; 9; 12; 15; 18;
20; 24V
s
THERMAL OVERLOAD PROTECTION
s
OUTPUT TRANSITION SOA PROTECTION
s
2% OUTPUT VOLTAGE TOLERANCE
s
GUARANTEED IN EXTENDED
TEMPERATURE RANGE
DESCRIPTION
The L7800A series of three-terminal positive
regulators is available in TO-220 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
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
adjustable voltages and currents.
TO-220
D
2
PAK
BLOCK DIAGRAM
1/17
CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)
TO-220
D
2
PAK
THERMAL DATA
Symbol
Parameter
D
2
PAK
TO-220
Unit
R
thj- ca se
R
thj- amb
Thermal Resistance Junction-case
Max
Thermal Resistance Junction-ambient
Max
3
62.5
3
50
o
C/W
o
C/W
Type
TO-220
D
2
PAK (*)
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
(*) AVAILABLE IN TAPE AND REEL WITH "-TR" SUFFIX
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
i
DC Input Voltage (for V
O
= 5 to 18V)
(for V
O
= 20, 24V)
35
40
V
V
I
o
Output Current
I nternally limited
P
tot
Power Dissipation
I nternally limited
T
op
Operating Junction Temperature Range (for L7800AC)
(for L7800AB)
0 to 150
-40 t o 125
o
C
o
C
T
st g
Storage Temperature Range
- 65 to 150
o
C
L7800AB/AC
2/17
APPLICATION CIRCUIT
SCHEMATIC DIAGRAM
L7800AB/AC
3/17
TEST CIRCUITS
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 V
o
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7805A (V
i
= 10V, I
o
= 1 A, T
j
= 0 to 125
o
C (L7805AC),
T
j
= -40 to 125
o
C (L7805AB) unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
4.9
5
5.1
V
V
o
Output Voltage
I
o
= 5 mA to 1 A
P
o
15 W
V
i
= 7.5 to 20 V
4.8
5
5.2
V
V
o
*
Line Regulation
V
i
= 7.5 to 25 V
I
o
= 500 mA
V
i
= 8 to 12 V
V
i
= 8 to 12 V
T
j
= 25
o
C
V
i
= 7.3 to 20 V
T
j
= 25
o
C
7
10
2
7
50
5
25
50
mV
mV
mV
mV
V
o
*
Load Regulation
I
o
= 5 mA to 1 A
I
o
= 5 mA to 1.5 A
T
j
= 25
o
C
I
o
= 250 to 750 mA
25
30
8
100
100
50
mV
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
4.3
6
6
mA
I
d
Quiescent Current Change
V
i
= 8 to 25 V
I
o
= 500 mA
V
i
= 7.5 to 20 V
T
j
= 25
o
C
I
o
= 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
SVR
Supply Voltage Rejection
V
i
= 8 to 18 V
f = 120 Hz
I
o
= 500 mA
68
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
2
V
e
N
Output Noise Voltage
B = 10Hz to 100KHz
T
j
= 25
o
C
10
V/V
o
R
o
Output Resistance
f = 1KHz
17
m
I
s c
Short Circuit Current
V
i
= 35 V
T
amb
= 25
o
C
0.2
A
I
scp
Short Circuit Peack Current
T
j
= 25
o
C
2.2
A
V
o
T
Output Voltage Drift
-1. 1
mV/
o
C
L7800AB/AC
5/17
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