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RP173N401B-TR-FE Datasheet(PDF) 8 Page - RICOH electronics devices division |
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RP173N401B-TR-FE Datasheet(HTML) 8 Page - RICOH electronics devices division |
8 / 22 page RP173x 8 TYPICAL APPLICATIONS C1 RP173x Series VDD VOUT CE GND C2 VOUT External Parts Example: C2: Ceramic Capacitor 0.1µF, Murata,GRM155B31C104KA87D TECHNICAL NOTES When using the ICs, please note 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 0.1 μF 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 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. POWER ACTIVATION If the ICs are started up with VIN and VCE under the no-load condition, the both pin voltages have to be started up with faster than 2.0V/s. If the IC is started up with slower than 2.0V/s under the no-load condition, start up the IC only with VCE. |
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