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RT5758是可在3V至6.5V输入电压范围内输出高达9A电流的高性能同步Buck转换器,使用集成化的低RDS(ON)功率开关、0.6V参考电压和自举二极管,整体方案体积小巧,容易使用。RT5758使用ACOTTM控制架构,具有超快的瞬态响应速度,外围元件数量极少。在稳定状态下,ACOT控制器工作在频率基本不变的状态下,与输入电压、负载大小和输出电压基本无关,EMI滤波器设计非常容易。该器件提供独立的使能控制输入端子和Power Good指示信号,易于使用在需要时序控制的设计中。为了限制启动期间的输入电流冲击,芯片提供了可用外部电容调节的软起动端SS。芯片还集成有逐周期电流限制保护、欠压保护、输入欠压锁定保护和过热保护功能。RT5758的封装形式为UQFN-13L 3x3 (FC)。
超快速瞬态响应
1MHz±20%稳定的工作频率
1.5%精度参考电压
ACOTTM控制架构
根据负载轻重自动选择PWM/PSM工作模式
针对陶瓷输出电容进行了优化
输入电压范围:3V至6.5V
预偏置启动
可调软起动
Power Good指示
使能控制
过流保护与过热保护
打嗝模式的欠压保护
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