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The RT8251 is a monolithic step-down switch mode converter with a built-in internal power MOSFET. It achieves 5A continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization.
The RT8251 provides protection functions such as cycle-by-cycle current limiting and thermal shutdown. In shutdown mode, the regulator draws 25μA of supply current. Programmable soft-start minimizes the inrush supply current and the output overshoot at initial startup. The RT8251 requires a minimum number of external components. The RT8251 is available in WQFN-16L 3x3 and SOP-8 (Exposed Pad) packages.
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  • 输入电压范围 : 4.75V 至 24V
  • 可调输出电压范围 : 0.8V 至 16V
  • 5A 输出电流
  • 25μA 的低停机电流
  • 内建功率级 MOSFET : 70mΩ
  • 效率高达 95%
  • 恒定操作频率 570kHz
  • 可采用低ESR的陶瓷电容做为输出电容
  • 过热关机保护
  • 逐周期的电流限制机制
  • 符合RoHS规范与无卤特性
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Distributed Power Systems Battery Charger DSL Modems Pre-regulator for Linear Regulators
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