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RT8237H是高性能的PWM控制器,用于笔记本电脑中将电池高电压转换为低电压为CPU内核、I/O、芯片组和存储器供电,最低输出电压可达0.7V,具备效率高、瞬态响应特性好、输出电压精度高等特性。它采用固定导通时间的PWM控制架构,可在很宽的输入输出电压比范围内工作,提供100ns级的负载瞬变响应速度,同时维持相对恒定的工作频率。使用中无需像传统电流模式PWM控制器那样需要使用电流检测电阻,降低了成本,提高了效率。具备强大的MOSFET驱动能力,轻载条件下可进入二极管仿真模式工作以提高效率。采用预先设定的工作频率,简化了设计工作压力。其封装形式为WDFN-10L 3x3。
输入电压范围:4.5V~26V
输出电压范围:0.7V~3.3V
内建0.5%精度0.7V参考电压源
100ns负载阶跃响应速度
使用4700ppm/°C电流源于电流限制中
借助下桥MOSFET实现可调电流限制
4个可选工作频率
软起动控制
强大的同步整流MOSFET驱动能力
集成自举开关
内建OVP/OCP/UVP
过热关机保护
Power Good指示
符合RoHS规范,不含卤素
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