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R1170H181B-T2 Datasheet(PDF) 7 Page - RICOH electronics devices division |
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R1170H181B-T2 Datasheet(HTML) 7 Page - RICOH electronics devices division |
7 / 16 page Rev. 1.10 -7- s Technical Notes on External Components and Typical Application Phase Compensation In these ICs, phase compensation is made with Output capacitor for securing stable operation even if the load current is varied. For this purpose, use as much as 10 µF Capacitor as CL. If you use a tantalum type capacitor and ESR value of the capacitor is large, output might be unstable. Evaluate your circuit with considering frequency characteristics. Further, refer to the Typical Characteristics No.12. Mounting on PCB Make VDD and GND lines sufficient. If the impedance of these is high, current flows, the noise might be picked up or be a cause of unstable operation. Further use as much as 10 µF Capacitor between VDD pin and GND pin as close as possible. Set an Output capcitor between VOUT pin and GND pin for phase compensation as close as possible. (Refer to the example of typical application) Example of the typical application of R1170HxxxB IN OUT VDD CE GND VOUT CI CL R1170Hxx1B CI=10 µF(Ceramic), CL=10µF(Ceramic) |
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