LM323 Ver la hoja de datos (PDF) - Motorola => Freescale
Número de pieza
componentes Descripción
Fabricante
LM323 Datasheet PDF : 8 Pages
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LM323, A
Figure 9. Dropout Voltage
2.5
8.0
Iout = 3.0 A
2.0
6.0
1.5
Iout = 1.0 A
Iout = 0.5 A
1.0
∆Vout = 50 mV
0.5–90 –50
–10
30
70
110 150 190
TJ, JUNCTION TEMPERATURE (°C)
4.0
2.0
0
5.0
Figure 10. Short Circuit Current
TJ = 0°C
TJ = 25°C
TJ = 125°C
10
15
20
25
Vin, INPUT VOLTAGE (Vdc)
Figure 11. Line Transient Response
0.8
0.6
0.4
Iout = 150 mA
CO = 0
TJ = 25°C
0.2
0
–0.2
–0.4
–0.6
1.0
0.5
0
0
10
20
30
40
t, TIME (µs)
Figure 12. Load Transient Response
0.3
0.2
Vin = 10 V
0.1
CO = 0
TJ = 25°C
0
–0.1
–0.2
–0.3
1.5
1.0
0.5
0
0
10
20
30
40
t, TIME (µs)
APPLICATIONS INFORMATION
Design Considerations
The LM323,A 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 current 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 0.33 µF 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 regulator’s 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.
MOTOROLA ANALOG IC DEVICE DATA
5
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