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RT8129B是使用5V/12V供电的单相同步Buck控制器,它使用固定导通时间(COT)PWM控制架构,将MOSFET驱动器、自举二极管集成于一体,在轻载条件下运行时可自动降低工作频率并进入二极管仿真模式,可极大化地改善轻载效率。它具有Power Good指示、使能控制和内建的软起动功能,具有过压保护、欠压保护、电流限制和热关机保护等功能。它利用不会增加损耗的下桥MOSFET RDS(ON)电流检测技术实现过流保护,过流保护阈值可通过连接于LGATE/OCSET和GND之间的电阻来进行设定。其封装形式为WDFN-10L 3x3。
输入电压范围:2.5V~25V
轻载效率高
集成高驱动能力的N-MOSFET驱动器和自举二极管
IC供电电压:4.5V~13.2V
Power Good指示
使能控制
内建软启动
可调过流保护阈值
欠压保护
过压保护
热关机保护
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