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The RT8109 is a single-phase synchronous buck PWM DC-DC controller designed to drive two N-MOSFETs. It provides a highly accurate, programmable output voltage precisely regulated to low voltage requirement with an internal 0.6V ±1% reference.
The RT8109 uses a single feedback loop voltage mode PWM control for fast transient response. The high driving capability makes it suitable for large output current applications. An oscillator with fixed frequency 300kHz reduces the component size of the external inductor and capacitor for saving PCB board area and cost.
The RT8109 supports both tracking and stand-alone loop control modes. Standalone mode is simple and tracking mode provides better flexibility. The RT8109 also integrates complete protection functions such as OCP, OVP, UVP into WDFN-10L 3x3 package.
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  • 输入电压范围:5V 至12V
  • 驱动两组N-MOSFET
  • 恒定操作频率300kHz
  • 具外部回馈补偿的电压模式PWM控制
  • 藉由感测MOSFET RDS(ON)的过电流保护
  • 双调节控制模式
  • Standalone Mode (FB regulating to close to internal reference 0.6V)
  • Tracking Mode (FB following PI input)
  • 致能/关机 控制
  • 占空比范围:0% 至90%
  • 快速瞬时响应
  • 符合RoHS规范与无卤特性
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主板和桌机服务器 显示适配器 开关电源 通用DC / DC电源稳压器
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