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LM323 Scheda tecnica(PDF) 5 Page - ON Semiconductor |
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LM323 Scheda tecnica(HTML) 5 Page - ON Semiconductor |
5 / 8 page LM323, LM323A http://onsemi.com 5 Figure 9. Dropout Voltage Figure 10. Short Circuit Current 010 20 30 40 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 1.0 0.5 0 t, TIME (µs) Iout = 150 mA CO = 0 TJ = 25°C 1.0 0 102030 40 t, TIME (µs) Vin = 10 V CO = 0 TJ = 25°C 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 1.5 0.5 0 Figure 11. Line Transient Response Figure 12. Load Transient Response 2.5 2.0 1.5 1.0 0.5-90 -50 -10 30 70 110 150 190 TJ, JUNCTION TEMPERATURE (°C) Iout = 3.0 A Iout = 1.0 A Iout = 0.5 A ∆Vout = 50 mV 8.0 6.0 4.0 2.0 0 5.0 10 15 20 25 Vin, INPUT VOLTAGE (Vdc) TJ = 0°C TJ = 25°C TJ = 125°C 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. |
Codice articolo simile - LM323_02 |
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Descrizione simile - LM323_02 |
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