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TS9020 データシート(PDF) 4 Page - Taiwan Semiconductor Company, Ltd |
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TS9020 データシート(HTML) 4 Page - Taiwan Semiconductor Company, Ltd |
4 / 6 page Preliminary TS9020 200mA Dual Channel CMOS LDO with Enable Function 4/6 Version: Preliminary Application Information (continue) Input Capacitor An input capacitance of 1µF is required between input pin and ground directly (the amount of the capacitance may be increased without limit). The input capacitor must be located less than 1cm from the device to assure input stability. A lower ESR capacitor allows the use of less capacitance, while higher ESR type (like aluminum electrolytic) requires more capacitance. Capacitor types (aluminum, ceramic and tantalum) can be mixed in parallel, but the total equivalent input capacitance/ ESR must be defined as above to stable operation. There are no requirements for the ESR on the input capacitor, but tolerance and temperature coefficient must be considered when selecting the capacitor to ensure the capacitance will be 1µF over the entire operating temperature range. Thermal Considerations The TS9020 series can deliver a current of up to 200mA/channel over the full operating junction temperature range. However, the maximum output current must be debated at higher ambient temperature to ensure the junction temperature does not exceed 125°C. With all possible conditions, the junction temperature must be within the range specified under operating conditions. Power dissipation can be calculated based on the output current and the voltage drop across regulator. PD = (VIN - VOUT) IOUT + VIN IGND The final operating junction temperature for any set of conditions can be estimated by the following thermal equation: PD(MAX) = (TJ(MAX) - TA) / θJA Where TJ(MAX) is the maximum junction temperature of the die (125°C) and TA is the maximum ambient temperature. The junction to ambient thermal resistance (θJA) SOT-26 package at recommended minimum footprint is 250°C/W. Visit our website in which “Recommended Footprints for Soldering Surface Mount Package” for detail. |
同様の部品番号 - TS9020 |
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同様の説明 - TS9020 |
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