Green Mode Buck Converter


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The RT8409 integrates a power MOSFET controller. It is used for step down converters by well controlling the internal MOSFET and regulating a constant output voltage.

The RT8409 features few system component counts and simple system design. Especially, the RT8409 can use a cheap simple drum core inductor in the system instead of an EE core while maintaining the high efficiency.

The RT8409 is housed in a SOP-8 package. The components of the whole system can be made very compact.


Key Spec.
Status Active
Supply Voltage (min) (V) 11
Supply Voltage (max) (V) 22
Vin (min) (V)
Vin (max) (V)
Topology Buck
Output C.V.
MOSFET Integrated Yes
Current Sense Threshold (mV) 1040
Dimming Control
Features OCP;OVP;SCP;Thermal Protection
Package Type SOP-8
  • Built-In 600V Power MOSFET
  • Programmable Constant Output Voltage
  • Extremely Low Quiescent Current Consumption and 1μA Shutdown Current
  • Low System BOM Cost for Economical Step Down Converter Solution
  • Universal Off-Line Input Voltage operation Range
  • Built-In Over-Temperature Protection
  • Built-In Over-Voltage Protection
  • Output Open Protection
  • Output Short Protection
  • Output Over-Current Protection
  • SOP-8 Package
TitleLast UpdateShareDownload
Green Mode Buck Converter2016/10/19
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