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RT7249为一款高效率、单晶且具有功率开关的同步降压型DC/DC转换器,在4.5V至18V的输入电源范围可提供最高为3A的输出电流。RT7249 采用电流模式架构和外部补偿,可优化瞬时响应的特性。逐周期的电流限制保护组件免受输出短路影响;软启动功能可在启动过程中防止了输入电流过冲。故障保护提供了输出欠压保护和过温保护。PWM频率可由ROSC脚位调整,功率开关的电流限制可由RLIM脚位调整。低电流消耗(<3μA)之电源关机模式会将输出关闭,有助于电池供电系统的电源管理。RT7249采用WQFN-16L 4x4封装。
降压调节器 ►输入电压范围:4.5V至18V ►3A输出电流►内建N-MOSFET开关组件 ►电流模式控制►PWM频率可调►输出电压可调:0.8V至15V ►缓启动时间可调 ►稳定兼容于陶瓷输出电容 ►逐周期电流限制 ►输入欠压闭锁►输出欠压保护►过热保护
功率开关 ►±15% 电流限制精确度 @1.2A ►电流限制可调:75mA至2580mA ►符合USB电流限制要求 ►反向输入-输出电压保护►内置软启动►120mΩ高侧MOSFET ►操作范围:2.5 V至5.5 V
符合RoHS规范与无卤特性
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