5A, 32V, 500kHz Step-Down Converter


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The RT8289 is a step-down regulator with an internal Power MOSFET. It achieves 5A of 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 RT8289 provides protections such as cycle-by-cycle current limiting and thermal shutdown. In shutdown mode, the regulator draws 25μA of supply current.

The RT8289 requires a minimum number of external components, to provide a compact solution.

The RT8289 is available in a SOP-8 (Exposed Pad) package.


  • Distributive Power Systems
  • LCD TV
  • DSL Modems
  • Pre-regulator for Linear Regulators
  • Battery Charger
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5A, 32V, 500kHz Step-Down Converter2009/12/02
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5A, 32V, 500kHz Step-Down Converter 2015/05/19
Technical Documents
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Reference Design
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Richtek Load Transient Tool2019/01/09
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT8289GSPPSOP-82500 Not available Buy from Distributor