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RP111L101D-TR Datasheet(PDF) 7 Page - RICOH electronics devices division |
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RP111L101D-TR Datasheet(HTML) 7 Page - RICOH electronics devices division |
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7 / 44 page  RP111x NO.EA-241-150204 7 TYPICAL APPLICATIONS VOUT C1 RP111x series VDD VOUT GND C2 CE VFB External Parts Example: C1, C2: Ceramic Capacitor 1.0µF, Murata, GRM155B31A105KE15 Under normal conditions, please connect the VOUT pin to the VFB pin. However, in the case of using the Adjustable Output Voltage Type, please follow the " Notes on the Adjustable Output Voltage Type Settings". TECHNICAL NOTES 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 1.0 F or more capacitor C2. In case of using a tantalum capacitor, the output may be unstable due to inappropriate ESR. Therefore, the full range of operating conditions for the capacitor in the application should be considered. 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 1.0 F 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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