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RS5RM3531A-T2 Datasheet(PDF) 2 Page - RICOH electronics devices division |
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RS5RM3531A-T2 Datasheet(HTML) 2 Page - RICOH electronics devices division |
2 / 30 page PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR 1 RS5RM SERIES OUTLINE The RS5RM Series are step-up DC/DC converter ICs equipped with a voltage regulator (VR) and a voltage detector (VD) by CMOS process. Each of these step-up DC/DC converter ICs consists of a PWM DC/DC convert- er, a linear regulator and a voltage detector. These ICs are output-voltage-fixed type regulators which function as a linear regulator when input voltage is high, and as step-up DC/DC converter+linear regulator when input voltage is low, by using an inductor, a diode and a capacitor as external parts for the ICs. Since a voltage detector is built in these ICs, the potentials such as the output voltage of DC/DC converters can be monitored. In addition, these step-up DC/DC converter ICs are suitable for battery-powered and hand-held instruments because internal circuits can be turned off by the chip enable function so that the standby current can be mini- mized. • Low Supply Current ..........................................TYP. 55µA (RS5RM3624A : VIN=3.0V,at no load) • Standby Mode.....................................................Istandby=MAX. 1.0µA (RS5RM ××××A) Istandby=MAX. 10.0µA (RS5RM ××××B) • Low Voltage Operation Possible .......................Operating Voltage VIN=1.2V to 10V • High Output Voltage Accuracy.........................Fixed Output Voltage Accuracy±2.5% • High Voltage Detection Accuracy .....................±2.5% • Output Voltage can be set at User's request (refer to Selection Guide). • Voltage close to battery's voltage can be output because these ICs are of a step-up / step-down type (Ex. a fixed voltage of 3V can be output by a 3V battery). • Soft Start Function, built-in Protection Circuits for Lx Driver • Phase Compensation Circuits built in • Pin for External Driver is equipped, and a large current output can be obtained. • Small Packages ..................................................8pin SOP FEATURES APPLICATIONS • Power source for cameras, camcorders, and hand-held audio equipment. • Power source for small OA apparatus such as note book personal computers,and word processors. • Power source for hand-held communication appliances such as pagers,cordless telephones, and cellular phones. |
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