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October 2003
s
OUTPUT CURRENT TO 0.5A
s
OUTPUT VOLTAGES OF 5; 6; 8; 9; 10; 12;
15; 18; 20; 24V
s
THERMAL OVERLOAD PROTECTION
s
SHORT CIRCUIT PROTECTION
s
OUTPUT TRANSITION SOA PROTECTION
s
2% OUTPUT VOLTAGE TOLERANCE
s
GUARANTEED IN EXTENDED
TEMPERATURE RANGE
DESCRIPTION
The L78M00AB series of three-terminal positive
regulators is available in TO-220 and DPAK
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 0.5A output
current. Although designed primarily as fixed
voltage regulators, these devices can be used
with external components to obtain adjustable
voltage and currents.
L78M00AB/AC
SERIES
PRECISION 500mA REGULATORS
SCHEMATIC DIAGRAM
TO-220
DPAK
L78M00AB/AC SERIES
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ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
THERMAL DATA
SHEMATIC DIAGRAM
Symbol
Parameter
Value
Unit
V
I
DC Input Voltage
for V
O
= 5 to 18V
35
V
for V
O
= 20, 24V
40
I
O
Output Current
Internally Limited
P
tot
Power Dissipation
Internally Limited
T
stg
Storage Temperature Range
-65 to +150
C
T
op
Operating Junction Temperature
Range
for L78M00AC
0 to 125
C
for L78M00AB
-40 to 125
Symbol
Parameter
TO-220
DPAK
Unit
R
thj-case
Thermal Resistance Junction-case
MAX
3
8
C/W
R
thj-amb
Thermal Resistance Junction-ambient
MAX
50
100
C/W
L78M00AB/AC SERIES
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ELECTRICAL CHARACTERISTICS OF L78M05XX (refer to the test circuits, V
I
= 10V, I
O
= 350 mA,
C
I
= 0.33 F, C
O
= 0.1 F, T
J
= -40 to 125C (AB), T
J
= 0 to 125C (AC) unless otherwise specified)
ELECTRICAL CHARACTERISTICS OF L78M06XX (refer to the test circuits, V
I
= 11V, I
O
= 350 mA,
C
I
= 0.33 F, C
O
= 0.1 F, T
J
= -40 to 125C (AB), T
J
= 0 to 125C (AC) unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= 25C
4.9
5
5.1
V
V
O
Output Voltage
I
O
= 5 to 350 mA
V
I
= 7 to 20 V
4.8
5
5.2
V
V
O
Line Regulation
V
I
= 7 to 25 V, I
O
= 200 mA
T
J
= 25C
100
mV
V
I
= 8 to 25 V, I
O
= 200 mA
T
J
= 25C
50
V
O
Load Regulation
I
O
= 5 to 500 mA
T
J
= 25C
100
mV
I
O
= 5 to 200 mA
T
J
= 25C
50
I
d
Quiescent Current
T
J
= 25C
6
mA
I
d
Quiescent Current Change
I
O
= 5 to 350 mA
0.5
mA
I
O
= 200 mA
V
I
= 8 to 25 V
0.8
V
O
/
T Output Voltage Drift
I
O
= 5 mA
-0.5
mV/C
SVR
Supply Voltage Rejection
V
I
= 8 to 18 V
f = 120Hz
I
O
= 300mA
T
J
= 25C
62
dB
eN
Output Noise Voltage
B =10Hz to 100KHz
T
J
= 25C
40
V
V
d
Dropout Voltage
T
J
= 25C
2
V
I
sc
Short Circuit Current
T
J
= 25C
V
I
= 35 V
300
mA
I
scp
Short Circuit Peak Current
T
J
= 25C
700
mA
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= 25C
5.88
6
6.12
V
V
O
Output Voltage
I
O
= 5 to 350 mA
V
I
= 8 to 21 V
5.75
6
6.3
V
V
O
Line Regulation
V
I
= 8 to 25 V, I
O
= 200 mA
T
J
= 25C
100
mV
V
I
= 9 to 25 V, I
O
= 200 mA
T
J
= 25C
30
V
O
Load Regulation
I
O
= 5 to 500 mA
T
J
= 25C
120
mV
I
O
= 5 to 200 mA
T
J
= 25C
60
I
d
Quiescent Current
T
J
= 25C
6
mA
I
d
Quiescent Current Change
I
O
= 5 to 350 mA
0.5
mA
I
O
= 200 mA
V
I
= 9 to 25 V
0.8
V
O
/
T Output Voltage Drift
I
O
= 5 mA
-0.5
mV/C
SVR
Supply Voltage Rejection
V
I
= 9 to 19 V
f = 120Hz
I
O
= 300mA
T
J
= 25C
59
dB
eN
Output Noise Voltage
B =10Hz to 100KHz
45
V
V
d
Dropout Voltage
T
J
= 25C
2
V
I
sc
Short Circuit Current
T
J
= 25C
V
I
= 35 V
270
mA
I
scp
Short Circuit Peak Current
T
J
= 25C
700
mA
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