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The RT5715 is a 2A, high-efficiency, Advanced Constant-On-Time (ACOT) synchronous step-down converter. The device operates with input voltages from 2.5V to 5.5V. The device can program the output voltage between 0.45V to VIN. The low quiescent current design with the integrated low R<sub>DS(ON)</sub> power MOSFETs achieves high efficiency over the wide load range. The advanced COT operation allows transient responses to be optimized over a wide range of loads, and output capacitors to efficiently reduce external component count. The RT5715 provides up to 2.7MHz switching frequency to minimize the size of output inductor and capacitors.<br /><br />The RT5715 provides complete protection functions such as input under voltage lockout, output under voltage protection, over current protection, and thermal shutdown.<br /><br />Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The RT5715 is available in WDFN-8SL 2x2 package.
RT5715 Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>2A Converter Integrated 100mΩ and 80mΩ FETs in WDFN-8SL 2x2 Package </li><li>Input Supply Voltage Range : 2.5V to 5.5V </li><li>Output Voltage Range : 0.45V to V<sub>IN</sub> </li><li>Advanced Constant On-Time (ACOT<sup>TM</sup>) Control <ul class="lv2"> <li></li><li>Ultrafast Transient Response </li><li>No Needs for External Compensations </li><li>Optimized for Low-ESR Ceramic Output Capacitors </li></ul> </li><li>High Accuracy Feedback Reference Voltage : 0.45V ± 1% </li><li>Low Quiescent Current : 30μA </li><li>Fixed Switching Frequency : 2.7MHz </li><li>Internally Fixed Soft-Start (typ. 150μs) </li><li>Safe Start-Up from Pre-biased Output </li><li>Input Under-Voltage Lockout (UVLO) </li><li>Output Under-Voltage Protection (UVP) with Hiccup Mode </li><li>Over-Temperature Protection (OTP) (Thermal Shutdown) </li><li>Enable Control </li><li>Power Good Indication </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT5715 Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Mobile Phones and Handheld Devices </li><li>STB, Cable Modem, and xDSL Platforms </li><li>WLAN ASIC Power / Storage (SSD and HDD) </li><li>General Purpose for POL LV Buck Converter </li></ul></div>
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