L78S09CV.pdf
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L78S00
SERIES
2A POSITIVE VOLTAGE REGULATORS
OUTPUT CURRENT TO 2A
n
OUTPUT VOLTAGES OF 5; 7.5; 9; 10; 12; 15;
18; 24V
n
THERMAL OVERLOAD PROTECTION
n
SHORT CIRCUIT PROTECTION
n
OUTPUT TRANSITION SOA PROTECTION
n
DESCRIPTION
The L78S00 series of three-terminal positive
regulators is available in TO-220 and TO-3
packages and with 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 2A 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
TO-3
SCHEMATIC DIAGRAM
February 2003
1/24
L78S00 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter²
Value
Unit
DC Input Voltage
for V
O
= 5 to 18 V
35
V
I
V
for V
O
=24V
40
I
O
Output Current
Internally Limited
P
tot
Power Dissipation
Internally Limited
T
stg
Storage Temperature Range
-65 to 150
°C
Operating Junction Temperature
Range
for L78S00
-55 to 150
T
op
°C
for L78S00C
0 to 150
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
Parameter
TO-220
TO-3
Unit
R
thj-case
Thermal Resistance Junction-case
Max
5
4
°C/W
R
thj-amb
Thermal Resistance Junction-ambient
Max
50
35
°C/W
SHEMATIC DIAGRAM
2/24
L78S00 SERIES
CONNECTION DIAGRAM
(top view)
TO-220
TO-3
ORDERING CODES
TYPE
TO-220
TO-3
OUTPUT VOLTAGE
L78S05
L78S05T
5 V
L78S05C
L78S05CV
L78S05CT
5 V
L78S75
L78S75T
7.5 V
L78S75C
L78S75CV
L78S75CT
7.5 V
L78S09
L78S09T
9 V
L78S09C
L78S09CV
L78S09CT
9 V
L78S10
L78S10T
10 V
L78S10C
L78S10CV
L78S10CT
10 V
L78S12
L78S12T
12 V
L78S12C
L78S12CV
L78S12CT
12 V
L78S15
L78S15T
15 V
L78S15C
L78S15CV
L78S15CT
15 V
L78S18
L78S18T
18 V
L78S18C
L78S18CV
L78S18CT
18 V
L78S24
L78S24T
24 V
L78S24C
L78S24CV
L78S24CT
24 V
APPLICATION CIRCUIT
3/24
L78S00 SERIES
TEST CIRCUITS
Figure 1 :
DC Parameters
Figure 2 :
Load Regulation
Figure 3 :
Ripple Rejection
4/24
L78S00 SERIES
ELECTRICAL CHARACTERISTICS OF L78S05
(refer to the test circuits, T
J
= 25°C, V
I
=10V,
I
O
= 500 mA, unless otherwise specified).
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
4.8
5
5.2
V
V
O
Output Voltage
I
O
=1A
V
I
= 7 V
4.75
5
5.25
V
D
V
O
Line Regulation
V
I
= 7 to 25 V
100
mV
V
I
= 8 to 25 V
50
D
V
O
Load Regulation
I
O
=20mAto2A
100
mV
I
d
Quiescent Current
8
A
D
I
d
Quiescent Current Change
I
O
= 20 mA to 1 A
0.5
mA
I
O
=20mA
V
I
=7to25V
1.3
D
V
O
/
D
T
Output Voltage Drift
I
O
=5mA
T
J
= -55 to 150°C
-1.1
mV/°C
eN
Output Noise Voltage
B = 10 Hz to 100 KHz
40
m
V
SVR
Supply Voltage Rejection
f = 120Hz
60
dB
V
I
Dropout Voltage
I
O
£
1A
8
V
R
O
Output Resistance
f = 1 KHz
17
m
W
I
sc
Short Circuit Current
V
I
= 27 V
500
mA
I
scp
Short Circuit Peak Current
3
A
ELECTRICAL CHARACTERISTICS OF L78S75
(refer to the test circuits, T
J
= 25°C, V
I
=12.5V,
I
O
= 500 mA, unless otherwise specified).
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
7.15
7.5
7.9
V
V
O
Output Voltage
I
O
=1A
V
I
= 9.5 V
7.1
7.5
7.95
V
D
V
O
Line Regulation
V
I
= 9.5 to 25 V
120
mV
V
I
= 10.5 to 20 V
60
D
V
O
Load Regulation
I
O
=20mAto2A
120
mV
I
d
Quiescent Current
8
A
D
I
d
Quiescent Current Change
I
O
= 20 mA to 1 A
0.5
mA
I
O
=20mA
V
I
= 9.5 to 25 V
1.3
D
V
O
/
D
T
Output Voltage Drift
I
O
=5mA
T
J
= -55 to 150°C
-0.8
mV/°C
eN
Output Noise Voltage
B = 10 Hz to 100 KHz
52
m
V
SVR
Supply Voltage Rejection
f = 120Hz
54
dB
V
I
Dropout Voltage
I
O
£
1.5 A
10.5
V
R
O
Output Resistance
f = 1 KHz
16
m
W
I
sc
Short Circuit Current
V
I
= 27 V
500
mA
I
scp
Short Circuit Peak Current
3
A
5/24
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