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The RT4823Q is a boost converter designed to provide a minimum output voltage from a single-cell Li-Ion battery, even when the battery voltage is below the system minimum. The RT4823Q allows systems to take advantage of new battery chemistries that can supply significant energy even when the battery voltage is lower than the required voltage for system power ICs. By combining built-in power transistors, synchronous rectification, and low supply current, this IC provides a compact solution for systems using advanced Li-Ion battery chemistries.In boost mode, output voltage regulation is guaranteed up to a maximum load current of 1500mA. Quiescent current in shutdown mode is less than 1μA, which maximizes battery life. The regulator transitions smoothly between bypass and normal boost mode. The device can be forced into bypass mode to reduce quiescent current.The RT4823Q is available in the WL-CSP-9B 1.3x1.2 (BSC) package. The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.
RT4823Q Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Ultra-Low Operating Quiescent Current </li><li>Quick Start-Up Time (< 430μsec) </li><li>Few External Components Needed: A 1μH Inductor, A 0402 Case Size Input Capacitor, and A 0603 Case Size Output CapacitorInput Voltage Range: 1.8V to 5.5V </li><li>Support V<sub>IN</sub> > V<sub>OUT</sub> Operation </li><li>Default Boost Output Voltage Setting: V<sub>OUT</sub> = 5V </li><li>Maximum Continuous Load Current: 1.5A at V<sub>IN</sub> > 3V Boosting V<sub>OUT</sub> to 5V </li><li>Up to 93% Efficiency </li><li>EN(H), FPWM(H): Forced PWM Mode </li><li>EN(H): Boost Mode </li><li>EN(L): Shutdown Mode </li><li>Internal Synchronous Rectifier </li><li>Overcurrent Protection </li><li>Cycle-by-Cycle Current Limit </li><li>Overvoltage Protection </li><li>Short-Circuit Protection </li><li>Over-Temperature Protection </li><li>Small WL-CSP-9B 1.3x1.2 (BSC) Package </li></ul></div>
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RT4823Q Ordering Information
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<div class="spec-list"><ul class="lv1"><li>NFC Device Power Supply </li><li>USB Charging Ports </li><li>PC Accessory Applications </li><li>TWS (True Wireless Stereo) Hall Sensors </li><li>Gaming Device Sensors </li></ul></div>
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