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R1163K251D Datasheet(PDF) 8 Page - RICOH electronics devices division |
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R1163K251D Datasheet(HTML) 8 Page - RICOH electronics devices division |
8 / 36 page R1163x 8 ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE Topt = 25°C Dropout Voltage (V) VDIF(ECO =H) VDIF(ECO =L) Output Voltage VOUT (V) Condition Typ. Max. Typ. Max. 1.5 < = VOUT < 1.6 0.400 0.680 0.420 0.680 1.6 < = VOUT < 1.7 0.380 0.550 0.390 0.550 1.7 < = VOUT < 1.8 0.350 0.520 0.370 0.520 1.8 < = VOUT < 2.0 0.340 0.490 0.350 0.490 2.0 < = VOUT < 2.8 0.290 0.425 0.300 0.425 2.8 < = VOUT < = 4.0 IOUT = 150mA 0.250 0.350 0.250 0.350 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 0.47 µF or more ceramic capacitor COUT. (Test these ICs with as same external components as ones to be used on the PCB.) When a tantalum capacitor is used with this IC, if the equivalent series resistor (ESR) of the capacitor is large, output voltage may be unstable. PCB Layout Make VDD and GND lines sufficient. If their impedance is high, noise pickup 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 such as an output capacitor, as close as possible to the ICs and make wiring as short as possible. TYPICAL APPLICATION C1 C2 VDD OUT CE GND R1163x Series ECO VOUT V IOUT ∗External Components Ex. : C1: Ceramic Capacitor 1.0 µF C2 : Ceramic Capacitor 0.47 µF (Murata GRM40B474K) |
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