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The RT8209N/P PWM controller provides high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM supplies in notebook computers.
The constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency.
The RT8209N/P achieves high efficiency at a reduced cost by eliminating the current sense resistor found in traditional current mode PWMs. Efficiency is further enhanced by its ability to drive very large synchronous rectifier MOSFETs. The buck conversion allows this device to directly step down high voltage batteries for low voltage supplies as low as 0.75V. The RT8209N is in a WQFN-16L 3x3 package, the RT8209P is in a WQFN-14L 3.5x3.5 package.
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  • 极高的效率
  • 电阻可设定正电流限制阈值，电流经下桥 RDS(ON) 进行检测
  • 4700ppm/°C 电流检测
  • 100ns 负载阶跃快速响应能力
  • 全输入、负载范围内 1% VFB 精度
  • 4.5V~26V 输入电压范围
  • 电阻可设定工作频率
  • 集成自举开关
  • 集成负电流限制器
  • 电压瞬态过冲消除
  • 过压保护/欠压保护
  • 内置软启动和输出软放电功能
  • Power Good 指示
  • 符合 RoHS 规范，不含卤素
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笔记本电脑 系统电源 I/O 电源
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