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The RT5762 is a simple, easy-to-use, 2A synchronous step-down DC-DC converter with an input supply voltage range from 2.5V to 6V. The device builds in an accurate 0.6V reference voltage and integrates low R<sub>DS(ON)</sub> power MOSFETs to achieve high efficiency in SOT-563 (FC) and UDFN-6L 1.4x1 (FC) packages. <br /><br />The RT5762 adopts Advanced Constant On-Time (ACOT<sup>®</sup>) control architecture to provide an ultrafast transient response with few external components and to operate in nearly constant switching frequency over the line, load, and output voltage range. The RT5762A/C/E operates in automatic PSM that maintains high efficiency during light load operation. The RT5762B/D/F operates in Forced PWM that helps to meet tight voltage regulation accuracy requirements. <br /><br />The RT5762 senses both FETs current for a robust over-current protection. The device features cycle-by-cycle current limit protection which prevents the device from the catastrophic damage in output short circuit, over current or inductor saturation. A built-in soft-start function prevents inrush current during start-up. The device also includes input under-voltage lockout, output under-voltage protection, over-voltage protection (RT5762AL/BL/CL/DL/EL/FL) and over-temperature protection to provide safe and smooth operation in all operating conditions.
RT5762 Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Input Voltage Range from 2.5V to 6V </li><li>Integrated 100mΩ and 70mΩ FETs </li><li>100% Duty Cycle for Lowest Dropout </li><li>Internal Reference Voltage with 1% Accuracy </li><li>1.2MHz Typical Switching Frequency </li><li>Power Saving Mode for Light Loads (RT5762A/C/E) </li><li>Advanced Constant On-Time (ACOT<sup>®</sup>) Control </li><li>Internal Soft Startup (1.5ms) </li><li>Enable Control Input </li><li>Power Good Indicator </li><li>Negative Over-Current Protection (RT5762B/D/F) </li><li>Fully Protection with UVLO, OVP, UVP, Cycle-by-Cycle Current Limit and OTP </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT5762 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 Converters </li></ul></div>
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