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RP104N191C Datasheet(PDF) 7 Page - RICOH electronics devices division |
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RP104N191C Datasheet(HTML) 7 Page - RICOH electronics devices division |
7 / 32 page RP104x 7 TYPICAL APPLICATION C1 RP104x Series VDD VOUT CE GND C2 VOUT (External Components) C2 0.1 µF MURATA: GRM155B31C104KA87B TECHNICAL NOTES When using these ICs, consider the following points: Phase Compensation In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, use a capacitor C2 with good frequency characteristics and ESR (Equivalent Series Resistance). (Note: If additional ceramic capacitors are connected with parallel to the output pin with an output capacitor for phase compensation, the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the PCB.) PCB Layout Make VDD and GND lines sufficient. If their impedance is high, noise pickup or unstable operation may result. Connect a capacitor C1 with a capacitance value as much as 0.1 µF or more between VDD and GND pin, and as close as possible to the pins. Set external components, especially the output capacitor C2, as close as possible to the ICs, and make wiring as short as possible. |
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