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The RT9261B Series are VFM Step-up DC/DC converter ICs with ultra low supply current by CMOS process and suitable for use with battery-powered instruments.<br />The RT9261B IC consists of an oscillator, a VFM control circuit, a driver transistor (LX switch), a reference voltage unit, an error amplifier, resistors for voltage detection, and a LX switch protection circuit. A low ripple and high efficiency step-up DC/DC converter can be constructed with the RT9261B IC and only three external components.<br />The EN pin enables the circuit to set the standby supply current at a maximum of 0.5μA.</p>
RT9261B Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Minimal Number of External Components (Only an Inductor, a Diode, and a Capacitor) </li><li>Ultra Low Input Current (6.5μA at Switch Off) </li><li>Capable of Supplying 50mA Output Current with Internal Switch </li><li>± 2% Output Voltage Accuracy </li><li>Low Ripple and Low Noise </li><li>Low Start-up Voltage, 0.8V at 1mA </li><li>80% Efficiency with Low Cost Inductor </li><li>+50 ppm/°C Low Temperature-Drift </li><li>SOT-89 and SOT-23-5 Small Packages </li><li>RoHS Compliant and 100% Lead (Pb)-Free </li></ul></div>
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RT9261B Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Power source for battery-powered equipment </li><li>Power source for cameras, camcorders, VCRs, PDAs, pagers, electronic data banks, and hand-held communication equipment </li><li>Power source for appliances, which require higher voltage than that of batteries used in the appliances </li></ul></div>
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