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PDF L78M15ACDT Data sheet ( Hoja de datos )

Número de pieza L78M15ACDT
Descripción PRECISION 500mA REGULATORS
Fabricantes STMicroelectronics 
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L78M00AB/AC
SERIES
PRECISION 500mA REGULATORS
. OUTPUT CURRENT UP TO 0.5A
. OUTPUT VOLTAGES OF 5; 6; 8; 9: 10; 12; 15;
18; 20; 24V
. THERMAL OVERLOAD PROTECTION
. SHORT CIRCUIT PROTECTION
. OUTPUT TRANSISTORS SOA PROTECTION
. ± 2% OUTPUT VOLTAGE TOLERANCE
. GUARANTEED IN EXTENDED TEMPERA-
TURE RANGES
DESCRIPTION
The L78M00AB series of three-therminal 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 voltages and currents.
TO-220
3
1
DPAK
(T O - 25 2)
BLOCK DIAGRAM
March 1997
1/15

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L78M15ACDT pdf
L78M00AB/AC SERIES
ELECTRICAL CHARACTERISTICS FOR L78M05XX (refer to the test circuits, Vi = 10V, Io = 350 mA,
Ci = 0.33 µF, Co = 0.1 µF, Tj = -40 to 125 oC (AB), Tj = 0 to 125 oC (AC) unless otherwise specified)
Symbol
Parameter
Vo Output Voltage
Vo Output Voltage
Vo Line Regulation
Vo Load Regulation
Id
Id
Id
Vo
T
eN
SVR
Quiescent Current
Quiescent Current Change
Quiescent Current Change
Output Voltage Drift
Output Noise Voltage
Supply Voltage Rejection
Vd Dropout Voltage
Isc Short Circuit Current
Iscp Short Circuit Peack Current
Test Conditions
Tj = 25 oC
Io = 5 mA to 350 mA
Vi = 7 to 20 V
Io = 200 mA
Vi = 7 to 25 V
Vi = 8 to 25 V
Tj = 25 oC
Io = 5 to 500 mA
Io = 5 to 200 mA
Tj = 25 oC
Tj = 25 oC
Tj = 25 oC
Io = 5 to 350 mA
Io = 200 mA Vi = 8 to 25 V
Io = 5 mA
B = 10Hz to 100KHz Tj = 25 oC
Io = 300 mA f = 120 Hz Tj = 25 oC
Vi = 8 to 18 V
Tj = 25 oC
Tj = 25 oC Vi = 35 V
Tj = 25 oC
Min.
4.9
4.8
62
Typ.
5
5
-0.5
40
2
300
700
Max.
5.1
5.2
Unit
V
V
100 mV
30 mV
100 mV
50 mV
6 mA
0.5 mA
0.8 mA
mV/oC
µV
dB
V
mA
mA
ELECTRICAL CHARACTERISTICS FOR L78M06XX (refer to the test circuits, Vi = 11V, Io = 350 mA,
Ci = 0.33 µF, Co = 0.1 µF, Tj = -40 to 125 oC (AB), Tj = 0 to 125 oC (AC) unless otherwise specified)
Symbol
Parameter
Vo Output Voltage
Vo Output Voltage
Vo Line Regulation
Vo Load Regulation
Id
Id
Id
Vo
T
eN
SVR
Quiescent Current
Quiescent Current Change
Quiescent Current Change
Output Voltage Drift
Output Noise Voltage
Supply Voltage Rejection
Vd Dropout Voltage
Isc Short Circuit Current
Iscp Short Circuit Peack Current
Test Conditions
Tj = 25 oC
Io = 5 mA to 350 mA
Vi = 8 to 21 V
Io = 200 mA Tj = 25 oC
Vi = 8 to 25 V
Vi = 9 to 25 V
Io = 5 to 500 mA
Io = 5 to 200 mA
Tj = 25 oC
Tj = 25 oC
Tj = 25 oC
Io = 5 to 350 mA
Io = 200 mA Vi = 9 to 25 V
Io = 5 mA
B = 10Hz to 100KHz Tj = 25 oC
Io = 300 mA f = 120 Hz Tj = 25 oC
Vi = 9 to 19 V
Tj = 25 oC
Tj = 25 oC Vi = 35 V
Tj = 25 oC
Min.
5.88
5.75
59
Typ.
6
6
-0.5
45
2
270
700
Max.
6.12
6.3
Unit
V
V
100 mV
30 mV
120 mV
60 mV
6 mA
0.5 mA
0.8 mA
mV/oC
µV
dB
V
mA
mA
5/15

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L78M15ACDT arduino
Figure 10 : Load Transient Response.
L78M00AB/AC SERIES
Figure 11 : Line Transient Response.
Figure 12 : Quiescent Current vs. Input Voltage.
APPLICATIONS INFORMATION
DESIGN CONSIDERATIONS
The L78M00AB Series of fixed voltage regulators
are designed with Thermal Overload Protection that
shuts down the circuit when subjected to an
excessive power overload condition, Internal
Short-Circuit Protection that limits the maximum
current the circuit will pass, and Output Transistor
Safe-Area Compensation that reduces the output
short-circuit as the voltage across the pass
transistor is increased.
In many low current applications, compensation
capacitors are not required. However, it is
recommended that the regulator input be bypassed
with a capacitor if the regulator is connected to the
power supply filter with long wire lengths, or if the
output load capacitance is large. An input bypass
capacitor should be selected to provide good
high-frequency characteristics to insure stable
operation under all load conditions. A 0.33µF or
larger tantalum, mylar, or other capacitor having low
internal impedance at high frequencies should be
chosen. The bypass capacitor should be mounted
with the shortest possible leads directly across the
regulators input terminals. Normally good
construction techniques should be used to minimize
ground loops and lead resistance drops since the
regulator has no external sense lead.
11/15

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