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MC33375D-5.0R2G Datasheet(PDF) 9 Page - ON Semiconductor |
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MC33375D-5.0R2G Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 14 page MC33375, NCV33375 Series http://onsemi.com 9 1 mA Figure 22. Load Transient Response 1.82 V VCC = 3 V ILOAD = 1 mA to 100 mA TA = 25°C 1.80 V 1.78 V 100 mA 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 t, TIME (ms) APPLICATIONS INFORMATION LOAD Cout Vout Vin Cin GND MC33375−xx Figure 23. Typical Application Circuit ON/OFF The MC33375 regulators are designed with internal current limiting and thermal shutdown making them user−friendly. Figure 15 is a typical application circuit. The output capability of the regulator is in excess of 300 mA, with a typical dropout voltage of less than 260 mV. Internal protective features include current and thermal limiting. EXTERNAL CAPACITORS These regulators require only a 0.33 mF (or greater) capacitance between the output and ground for stability for 1.8 V, 2.5 V, 3.0 V, and 3.3 V output voltage options. Output voltage options of 5.0 V require only 0.22 mF for stability. The output capacitor must be mounted as close as possible to the MC33375. If the output capacitor must be mounted further than two centimeters away from the MC33375, then a larger value of output capacitor may be required for stability. A value of 0.68 mF or larger is recommended. Most type of aluminum, tantalum, or multilayer ceramic will perform adequately. Solid tantalums or appropriate multilayer ceramic capacitors are recommended for operation below 25 °C. An input bypass capacitor is recommended to improve transient response or if the regulator is connected to the supply input filter with long wire lengths, more than 4 inches. This will reduce the circuit’s sensitivity to the input line impedance at high frequencies. A 0.33 mF or larger tantalum, mylar, ceramic, or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with shortest possible lead or track length directly across the regulator’s input terminals. Figure 16 shows the ESR that allows the LDO to remain stable for various load currents. 0 100 LOAD CURRENT (mA) 100 200 300 10 1.0 0.1 Figure 24. ESR for Vout = 3.0V Vout = 3.0 V Cout = 1.0 mF Cin = 1.0 mF 50 150 250 Stable Region Applications should be tested over all operating conditions to insure stability. |
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