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UPC3018HB Datasheet(PDF) 3 Page - NEC |
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UPC3018HB Datasheet(HTML) 3 Page - NEC |
3 / 12 page Data Sheet G15506EJ2V0DS 3 µµµµPC3018, 3025 ABSOLUTE MAXIMUM RATINGS (TA = 25°C unless otherwise specified) Parameter Symbol Rating Unit Input Voltage VIN –0.3 to +20 V ON/OFF pin voltage VON/OFF –0.3 to VIN +0.3 V (however, VON/OFF ≤ 20) Internal Power Dissipation (TC = 25 °C) PT 10 Note W Operating Ambient Temperature TA –30 to +85 °C Operating Junction Temperature TJ –30 to +150 °C Storage Temperature Tstg –55 to +150 °C Thermal Resistance (junction to case) Rth(J-C) 12.5 °C/W Thermal Resistance (junction to ambient) Rth(J-A) 125 °C/W Note The total dissipation is limited by an internal circuit. Where TJ > 150°C, an internal protection circuit cuts off the output. Caution Product quality may suffer if the absolute maximum rating is exceeded even momentarily for any parameter. That is, the absolute maximum ratings are rated values at which the product is on the verge of suffering physical damage, and therefore the product must be used under conditions that ensure that the absolute maximum ratings are not exceeded. TYPICAL CONNECTION INPUT CIN PC3018, PC3025 OUTPUT COUT D1 D2 + ON/OFF CIN: Must be 0.1 µF or more. Determine the capacitance in accordance with the line between the power supply smoothing circuit and input pin. Be sure to connect this capacitor to prevent abnormal oscillation. Use of a capacitor with excellent voltage and temperature characteristics, such as a film capacitor, is recommended. Note that some laminated ceramic capacitors have poor temperature and voltage characteristics. When using a laminated ceramic capacitor, the capacitance of 0.1 µF or more must be reserved in the voltage and temperature ranges used. COUT: Must be 10 µF or more. Be sure to connect this capacitor to prevent oscillation and to improve transient load stability. Connect CIN and COUT as close to the IC pins as possible (within 1 to 2 cm). Also, when using the device at 0 °C or less, use an electrolytic capacitor with low impedance characteristics. D1: Connect a diode if the voltage on the OUTPUT pin is higher than that on the INPUT pin. D2: Connect a Schottky barrier diode if the voltage on the OUTPUT pin is lower than that on the GND pin. Caution Ensure that voltage is not applied to the OUTPUT pin externally. Supply VIN and VON/OFF from different power supplies. Design so that VIN and VON/OFF either rise at the same time or VON/OFF rises after VIN. |
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