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R1131D152D-TR-FE Datasheet(PDF) 8 Page - RICOH electronics devices division |
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R1131D152D-TR-FE Datasheet(HTML) 8 Page - RICOH electronics devices division |
8 / 24 page R1131x 8 TYPICAL APPLICATION VDD GND OUT OUT R1131x Series C2 C1 IN OUT OUT CE ⋅ CE <External Components examples> C2 1.0 μF CM05X5R105K06AB (Kyocera) C2 1.0 μF C1005JBOJ105K (TDK) C2 1.0 μF GRM155B30J105KE18B (Murata) Output Capacitor; 1.0 μF or more capacity ceramic Type (If VOUT < 1.0V, Tantalum Type is recommended) Input Capacitor, 1.0 μF or more capacity ceramic Type 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, be sure to use a 1.0 μF or more capacitor COUT with good frequency characteristics and ESR (Equivalent Series Resistance). (Note: If a tantalum capacitor is connected to the Output pin for phase compensation, if the ESR value of the capacitor is too large, the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the PCB.) Chip capacitor characteristics of Bias dependence and Temperature characteristics may vary depending on its size, manufacturer, and part number. PCB Layout Make VDD and GND lines sufficient. If their impedance is high, pick-up the noise or unstable operation may result. Connect a capacitor with as much as 1.0 μF capacitor between VDD and GND pin as close as possible. Set external components, especially the output capacitor, as close as possible to the ICs, and make wiring as short as possible. *R1131Dxx2 (HSON-6) is the discontinued product. As of June in 2016. |
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