L7800
SERIES
POSITIVE VOLTAGE REGULATORS
January 1997
s
OUTPUT CURRENT UP TO 1.5 A
s
OUTPUT VOLTAGES OF 5; 5.2; 6; 8; 8.5; 9;
12; 15; 18; 24V
s
THERMAL OVERLOAD PROTECTION
s
SHORT CIRCUIT PROTECTION
s
OUTPUT TRANSITION SOA PROTECTION
DESCRIPTION
The L7800 series of three-terminal positive
regulators is available in TO-220 ISOWATT220
TO-3 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.
1
2
TO-3
1
2
3
TO-220
ISOWATT220
1
2
3
1
3
D
2
PAK
BLOCK DIAGRAM
1/25
CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)
TO-220 & ISOWATT220
TO-3
D
2
PAK
THERMAL DATA
Symbol
Parameter
D
2
PAK
TO-220
ISOWATT220
TO-3
Unit
R
t hj- case
R
th j-a mb
Thermal Resistance Junction-case
Max
Thermal Resistance Junction-ambient
Max
3
62. 5
3
50
4
60
4
35
o
C/W
o
C/W
Type
TO-220
D
2
PAK (*)
ISOWATT 220
TO-3
Output Voltage
L7805
L7805C
L7852C
L7806
L7806C
L7808
L7808C
L7885C
L7809C
L7812
L7812C
L7815
L7815C
L7818
L7818C
L7820
L7820C
L7824
L7824C
L7805CV
L7852CV
L7806CV
L7808CV
L7885CV
L7809CV
L7812CV
L7815CV
L7818CV
L7820CV
L7824CV
L7805CD2T
L7852CD2T
L7806CD2T
L7808CD2T
L7885CD2T
L7809CD2T
L7812CD2T
L7815CD2T
L7818CD2T
L7820CD2T
L7824CD2T
L7805CP
L7852CP
L7806CP
L7808CP
L7885CP
L7809CP
L7812CP
L7815CP
L7818CP
L7820CP
L7824CP
L7805T
L7805CT
L7852CT
L7806T
L7806CT
L7808T
L7808CT
L7885CT
L7809CT
L7812T
L7812CT
L7815T
L7815CT
L7818T
L7818CT
L7820T
L7820CT
L7824T
L7824CT
5V
5V
5.2V
6V
6V
8V
8V
8.5V
9V
12V
12V
15V
15V
18V
18V
20V
20V
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
Internally limited
P
t ot
Power Dissipation
Internally limited
T
o p
Operating Junction Temperature Range (for L7800)
(for L7800C)
- 55 t o 125
0 to 150
o
C
o
C
T
stg
Storage Temperature Range
- 40 t o 150
o
C
L7800
2/25
APPLICATION CIRCUIT
SCHEMATIC DIAGRAM
L7800
3/25
TEST CIRCUITS
Figure 3 : Ripple Rejection.
Figure 2 : Load Regulation.
Figure 1 : DC Parameter
L7800
4/25
ELECTRICAL CHARACTERISTICS FOR L7806 (refer to the test circuits, T
j
= -55 to 150
o
C,
V
i
= 15V, I
o
= 500 mA, C
i
= 0.33
F, C
o
= 0.1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
5.75
6
6.25
V
V
o
Output Voltage
I
o
= 5 mA to 1 A
P
o
15 W
V
i
= 9 to 21 V
5.65
6
6.35
V
V
o
*
Line Regulation
V
i
= 8 to 25 V
T
j
= 25
o
C
V
i
= 9 to 13 V
T
j
= 25
o
C
60
30
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
100
30
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
6
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= 9 to 25 V
0.8
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
0. 7
mV/
o
C
eN
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
40
V/V
O
SVR
Supply Voltage Rejection
V
i
= 9 to 19 V
f = 120 Hz
65
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
2
2.5
V
R
o
Output Resistance
f = 1 KHz
19
m
I
sc
Short Circuit Current
V
i
= 35 V
T
j
= 25
o
C
0.75
1.2
A
I
s cp
Short Circuit Peak Current
T
j
= 25
o
C
1.3
2. 2
3.3
A
ELECTRICAL CHARACTERISTICS FOR L7805 (refer to the test circuits, T
j
= -55 to 150
o
C,
V
i
= 10V, I
o
= 500 mA, C
i
= 0.33
F, C
o
= 0.1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
4.8
5
5.2
V
V
o
Output Voltage
I
o
= 5 mA to 1 A
P
o
15 W
V
i
= 8 to 20 V
4.65
5
5.35
V
V
o
*
Line Regulation
V
i
= 7 to 25 V
T
j
= 25
o
C
V
i
= 8 to 12 V
T
j
= 25
o
C
3
1
50
25
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
100
25
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
6
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= 8 to 25 V
0.8
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
0. 6
mV/
o
C
eN
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
40
V/V
O
SVR
Supply Voltage Rejection
V
i
= 8 to 18 V
f = 120 Hz
68
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
2
2.5
V
R
o
Output Resistance
f = 1 KHz
17
m
I
sc
Short Circuit Current
V
i
= 35 V
T
j
= 25
o
C
0.75
1.2
A
I
s cp
Short Circuit Peak Current
T
j
= 25
o
C
1.3
2. 2
3.3
A
* Load and line regulation are specified at constant junction temperature. Changes in V
o
due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
L7800
5/25
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