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RT7257C为高效率的DC/DC单芯片同步降压型转换器,输入电压范围从4.5V至18V,输出电流至3A。RT7257C的电流模式架构与外部的补偿机制可因应大范围的输入与负载变化的瞬时响应进行优化的补偿。逐周期形式的限流机制可在输出短路时提供电路保护作用,缓启动机制则可消除启动瞬间的输入电流涌浪的问题。此外RT7257C提供低电压保护与热关断保护功能,低电流消耗(<3μA)的关断模式则可断开与输出的连接,实现简易的电池供电系统中的电源管理。RT7257C采用SOP-8(裸露焊盘)的封装规格。
±1.5% 高精准度参考电压
4.5V 至 18V输入电压范围
3A 输出电流
整合的 N-MOSFET 开关
电流模式控制
固定操作频率 : 340kHz
可调输出电压范围 0.8V 至 15V
效率高达 95%
可设计的缓启动机制
可采用低ESR的陶瓷电容做为输出电容
逐周期的电流限制机制
输入低电压锁定机制
输出低电压保护
热关断保护
符合RoHS规范与无卤特性
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