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TK71590SCL Datasheet(PDF) 10 Page - TOKO, Inc |
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TK71590SCL Datasheet(HTML) 10 Page - TOKO, Inc |
10 / 13 page Page 10 January 1999 TOKO, Inc. TK715xx TK715xxS CL ESR APPLICATION INFORMATION INPUT-OUTPUT CAPACITORS Linear regulators require input and output capacitors in order to maintain regulator loop stability. The output capacitor should be selected within the Equivalent Series Resistance (ESR) range as shown in the graphs below for stable operation. When a ceramic capacitor is connected in parallel with the output capacitor, a maximum of 1000 pF is recommended. This is because the ceramic capacitor's electrical characteristics (capacitance and ESR) vary widely over temperature. If a large ceramic capacitor is used, a resistor should be connected in series with it to bring it into the stable operating area shown in the graphs below. Minimum resistance should be added to maintain load and line transient response. Note: It is very important to check the selected manufacturers electrical characteristics (capacitance and ESR) over temperature. 715xxS CL ESR 100 10 1 0.1 0 .01 0 50 100 IOUT (mA) STABLE OPERATION AREA 100 10 1 0.1 0 .01 0 50 100 IOUT (mA) STABLE OPERATION AREA 100 10 1 0.1 0 .01 0 50 100 IOUT (mA) STABLE OPERATION AREA C L = 1.0 µF C L = 2.2 µF C L = 4.7 µF Note: It is not necessary to connect a ceramic capacitor in parallel with an aluminum or tantalum output capacitor. |
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