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SPX2930 Datasheet(PDF) 4 Page - Sipex Corporation |
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SPX2930 Datasheet(HTML) 4 Page - Sipex Corporation |
4 / 9 page 4 Date: 05/25/04 SPX2930 150mA Low Dropout Voltage Regulator © Copyright 2002 Sipex Corporation Figure 7. Maximum Power Dissipation (SOT89) Figure 8. Maximum Power Dissipation (TO-92) Figure 9. Output Impedance Figure 10. Operation During Load Dump 0.0 010 20 40 70 80 AMBIENT TEMPERATURE (ºC) 30 50 60 90 0.4 0.8 1.2 1.6 2.0 1.0 0 20 40 50 60 AMBIENT TEMPERATURE (ºC) 0.9 0.8 0.7 0.6 0.5 0.4 0.1 0.3 0.2 0 10 30 70 80 90 0.125" LEAD LENGTH FROM PC BOARD 0.4" LENGTH FROMPC BOARD 10 1 0.1 0 30 60 90 120 150 FREQUENCY (Hz) 0.01 5.0V I O = 10mA OPERATION DURING LOAD DUMP TIME (ms) 400 200 100 -100 30 10 0 6 4 -2 2 0 0 300 ~ ~ 20 40 50 60 70 500 ~ ~ C O = 100µF R L = 500Ω APPLICATION INFORMATION The SPX2930 requires an output capacitor for device stability. The value required varies greatly depending upon the application circuit and other factors. The high frequency characteristics of electrolytic capacitors depend greatly on the type and also on the manufacturer. Sometimes only bench testing is the only means to deter- mine the proper capacitor type and value. The high quality 100 µF aluminum electrolytic cov- ers all general application circuits, this stability can be obtained with a tantalum electrolytic value of 47 µF. Another critical point of electrolytic character- istics is its performance over temperature. The SPX2930 is designed to operate starting at - 40 °C which may not be true in the case of electrolytic. Higher temperatures generally no problem. The electrolytic. type in aluminum will freeze around -30 °C. This could cause an oscillation at output of regulator. At a lower temperature requirement by many applications the capacitor should maintain its performance. So as a result, for an application which regulator junction temperature does not exceed 25 °C, the TYPICAL PERFORMANCE CHARACTERISTICS |
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