RT8251

General description

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.

 Features

-Wide Operating Input Voltage Range : 4.75V to 24V

-Adjustable Output Voltage Range : 0.8V to 15V

-Output Current up to 5A

-25μA Low Shutdown Current

-Internal Power MOSFET : 70mΩ

-High Efficiency up to 95%

-570kHz Fixed Switching Frequency

-Stable with Low ESR Output Ceramic Capacitors

-Thermal Shutdown Protection

-Cycle-By-Cycle Over Current Protection

-RoHS Compliant and Halogen Free

Applications

-Distributed Power Systems

-Battery Charger

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