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The RT8026 is a high-efficiency Pulse-Width-Modulated (PWM) step-down DC-DC converter. Capable of delivering 1A output current over a wide input voltage range from 2.7V to 5.5V, the RT8026 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources such as cellular phones, PDAs and hand-held devices.<br />Two operating modes are available including : PWM/Low-Dropout autoswitch and shut-down modes. The Internal synchronous rectifier with low R<sub>DS(ON)</sub> dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application.<br />The RT8026 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. The RT8026 enter shut-down mode and consumes less than 0.1μA when the EN pin is pulled low.<br />The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 1.5MHz. This along with small MSOP-10 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.
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<div class="spec-list"><ul class="lv1"><li>Input Voltage Range : 2.7V to 5.5V </li><li>Adjustable Output Voltage : 1V to V<sub>IN</sub> </li><li>Output Current : 1A </li><li>High Efficiency : up to 95% </li><li>No Schottky Diode Required </li><li>1.5MHz Fixed-Frequency PWM Operation </li><li>Current Limiting Protection </li><li>Thermal Shutdown Protection </li><li>Small MSOP-10 Package </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Mobile Phones </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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