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The RT2858 is a synchronous DC/DC step-down converter with Advanced Constant On-Time (ACOT<sup>®</sup> ) mode control. It achieves high power density to deliver up to 3A output current from a 4.5V to 18V input supply. The proprietary ACOT<sup>®</sup> mode offers an optimal transient response over a wide range of loads and all kinds of ceramic capacitors, which allows the device to adopt very low ESR output capacitors for ensuring performance stabilization. In addition, the RT2858 keeps an excellent constant switching frequency under line and load variation and the integrated synchronous power switches with the ACOT<sup>®</sup> mode operation provides high efficiency in whole output current load range. Cycle-by-cycle current limit provides an accurate protection by a detection of low-side MOSFET and external soft-start setting eliminates input current surge during startup. Protection functions also include output under voltage protection and thermal shutdown.
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<div class="spec-list"><ul class="lv1"><li>ACOT<sup>®</sup> Control for Fast Transient, f<sub>SW</sub> Stability, and Robust Loop Stability with all-MLCC C<sub>OUT</sub> </li><li>4.5V to 18V Input Voltage Range </li><li>3A Output Current </li><li>R<sub>DSON</sub> 120mΩ/50mΩ for High Efficiency Across I<sub>OUT</sub> Range and Competitive Advantage for I<sub>OUT</sub> > 1.5A </li><li>Advanced Constant On-Time Control </li><li>Support All Ceramic Capacitors </li><li>Up to 95% Efficiency </li><li>650kHz f<sub>SW</sub>; Start-Up into Pre-Biased Load; Adjustable Soft-Start; Internal Bootstrap </li><li>Adjustable Output Voltage from 0.765V to 8V </li><li>Enable; UVLO; OCP (Cycle-by-Cycle); and OTP (150°C) </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Industrial and Commercial Low Power Systems </li><li>Computer Peripherals </li><li>LCD Monitors and TVs </li><li>Green Electronics/Appliances </li><li>Point of Load Regulation for High-Performance DSPs, FPGAs, and ASICs </li></ul></div>
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