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Product Spec Banner
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The RT6251A/B is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 3A output current from a 4.5V to 18V input supply. The RT6251A/B current-mode architecture with external compensation allows the transient response to be optimized over a wide range of loads and output capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. Fault condition protections include output under-voltage protection, output over-voltage protection, and over-temperature protection. The low current shutdown mode provides output disconnection, enabling easy power management in battery-powered systems.
RT6251A/RT6251B Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Low R<sub>DS(ON)</sub> Power MOSFET Switches 46mΩ/36mΩ </li><li>Input Voltage Range : 4.5V to 18V </li><li>Adjustable Switching Frequency : 200kHz to 1.2MHz </li><li>Current-Mode Control </li><li>Synchronous to External Clock : 200kHz to 1.2MHz </li><li>Accurate Voltage Reference 0.8V ± 1% </li><li>Monotonic Start-Up into Pre-biased Outputs </li><li>Adjustable Soft-Start </li><li>Power Good Indicator </li><li>Under-Voltage and Over-Voltage Protection </li><li>Input Under-Voltage Lockout </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>High Performance Point of Load Regulation </li><li>Notebook Computers </li><li>High Density and Distributed Power Systems </li></ul></div>
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