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![]() STMicroelectronics |
![]() L78L00
SERIES
POSITIVE VOLTAGE REGULATORS
s OUTPUT CURRENT UP TO 100 mA
s OUTPUT VOLTAGES OF 3.3; 5; 6; 8; 9; 10;
12; 15; 18; 20; 24V
s THERMAL OVERLOAD PROTECTION
s SHORT CIRCUIT PROTECTION
s NO EXTERNAL COMPONENTS ARE
REQUIRED
s AVAILABLE IN EITHER ±5% (AC) OR ±10%
(C) SELECTION
DESCRIPTION
The L78L00 series of three-terminal positive
regulators employ internal current limiting and
thermal shutdown, making them essentially
indestructible. If adequate heat-sink is provided,
they can deliver up to 100 mA output current. They
are intended as fixed voltage regulators in a wide
range of applications including local or on-card
regulation for elimination of noise and distribution
problems associated with single-point regulation.
In addition, they can be used with power pass
elements to make high-current voltage regulators.
The L78L00 series used as Zener diode/resistor
combination replacement, offers an effective
output impedance improvement of typically two
TO-92
SO-8
SOT-89
orders of magnitude, along with lower quiescent
current and lower noise.
SCHEMATIC DIAGRAM
July 2003
1/24
Free Datasheet http://www.nDatasheet.com
![]() L78L00 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter²
Value
Unit
DC Input Voltage
VO = 3.3 to 9 V
30
VI
VO = 12 to 15 V
35 V
VO = 18 to 24 V
40
IO Output Current
100 mA
Ptot Power Dissipation
Internally Limited (*)
Tstg Storage Temperature Range
-40 to 150
°C
Top
Operating Junction Temperature for L78L00C, L78L00AC
Range
for L78L00AB
0 to 125
-40 to 125
°C
(*) Our SO-8 package used for Voltage Regulators is modified internally to have pins 2, 3, 6 and 7 electrically communed to the die attach
flag. This particular frame decreases the total thermal resistance of the package and increases its ability to dissipate power when an appro-
priate area of copper on the printed circuit board is available for heat-sinking. The external dimensions are the same as for the standard SO-8.
THERMAL DATA
Symbol
Parameter
Rthj-case Thermal Resistance Junction-case
Rthj-amb Thermal Resistance Junction-ambient
(*) Considering 6 cm2 of copper Board heat-sink
SO-8
Max 20
Max 55 (*)
TO-92
200
SOT-89
15
Unit
°C/W
°C/W
TEST CIRCUITS
CONNECTION DIAGRAM (top view)
SO-8
2/24
SOT-89
PIN 1 = VOUT
PIN 2 = GND
PIN 3 = VIN
TO-92
BOTTOM VIEW
Free Datasheet http://www.nDatasheet.com
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