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The RT5771D is a high efficiency synchronous, step-down DC-DC converter. Its input voltage ranges from 2.7V to 5.5V that provides an adjustable regulated output voltage from 0.6V to V<sub>IN</sub> while delivering up to 3A of output current. The internal synchronous low on-resistance power switches increase efficiency and eliminate the need for an external Schottky diode. The switching frequency is fixed internally at 1MHz. The 100% duty cycle provides low dropout operation, hence extending battery life in portable systems. Current mode operation with internal compensation allows the transient response to be optimized over a wide range of loads and output capacitors. The RT5771D is available in the WDFN-10L 3x3 package.
RT5771D Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>High Efficiency : Up to 95% </li><li>High Efficiency at Light Load </li><li>Low R<sub>DS(ON)</sub> Power Switches : 69mΩ/49mΩ </li><li>Fixed Frequency : 1MHz </li><li>No Schottky Diode Required </li><li>Internal Compensation </li><li>0.6V Reference Allows Low Output Voltage </li><li>Low Dropout Operation : 100% Duty Cycle </li><li>OCP, UVP, OTP </li></ul></div>
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RT5771D Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Portable Instruments </li><li>Battery Powered Equipments </li><li>Notebook Computers </li><li>Distributed Power Systems </li><li>IP Phones </li><li>Digital Cameras </li></ul></div>
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