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RT8251为内建功率级MOSFET的DC/DC单芯片转换器,可在宽输入电压范围内达到5A的连续电流输出,并具有良好的负载与电源电压调节率,电流模式操作提供快速的瞬时响应与简易的回路稳定架构。此外并提供了逐周期形式的限流机制与热关断保护功能,操作于关机模式时,只有25μA的低电流消耗。另可藉由所自行设计的缓启动机制,降低启动时产生过大的输入电涌与输出电压峰值。RT8251只需要少数的外部组件,并支持WQFN-16L 3x3 与SOP-8 (裸露焊盘) 两种封装。
输入电压范围 : 4.75V 至 24V
可调输出电压范围 : 0.8V 至 16V
5A 输出电流
25μA 的低停机电流
内建功率级 MOSFET : 70mΩ
效率高达 95%
恒定操作频率 570kHz
可采用低ESR的陶瓷电容做为输出电容
过热关机保护
逐周期的电流限制机制
符合RoHS规范与无卤特性
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