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Product Spec Banner
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The RT8099 is a Pulse-Width-Modulated (PWM) DC/DC step-down converter, and is capable of delivering 0.6A output current over a wide input voltage range from 2.7V to 5.5V. The RT8099 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery such as cellular phones, PDAs and handy-terminals. Internal synchronous rectifier with low R<sub>DS(ON)</sub> dramatically reduces conduction loss at PWM mode. No external schottky barrier diode is required in practical application. The RT8099 enters low-dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the high-side P-MOSFET. The RT8099 enters shut-down mode and consumes less than 0.1μA when the EN pin is pulled low. The switching ripple is easily smoothed-out by small package filtering elements due to 1.5MHz high switching frequency. Other features include soft-start, auto discharge, lower internal reference voltage, over-temperature protection, and over-current protection. The RT8099 is available in the small UDFN-6L 1.6x1.6 package for saving PCB space.
RT8099 Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>2.7V to 5.5V Input Range </li><li>Adjustable Output from 0.7V to 5V </li><li>0.6A Output Current </li><li>95% Efficiency </li><li>No Schottky Barrier Diode Required </li><li>1.5MHz Spread Spectrum Frequency PWM Operation </li><li>Auto Discharge Function </li><li>Over-Current Protection </li><li>Overt-Temperature Protection </li><li>Integrated Soft-Start Function </li><li>Small 6-Lead UDFN Package </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT8099 Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Cellular Telephones </li><li>Personal Information Appliances </li><li>Wireless and DSL Modems </li><li>MP3 Players </li><li>Portable Instruments </li></ul></div>
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