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RT6255A/B是高性能的同步Buck转换器,负载能力5A,输入电压范围为4.5V~18V,集成了低RDS(ON) MOSFET功率开关、0.6V参考电压源、自举二极管,构成了非常紧凑的方案。它采用改进型固定导通时间(ACOT®)控制架构,具有超快瞬态响应能力,外围元件少,在各种工作条件下的稳态工作频率几乎恒定不变,解决EMI问题的滤波器设计相对容易。它具有独立的使能控制和Power Good指示,有1.5ms软起动设计可限制启动期间的冲击电流,具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特性,其封装形式有TSOT-23-6(FC)和TSOT-23-8。
输入电压范围:4.5V~18V
负载能力:5A
采用ACOT®控制架构,具有超快瞬态响应能力
稳态工作频率:500kHz►强制PWM模式(RT6255B)►轻载PSM模式(RT6255A)
针对使用低ESR陶瓷输出电容进行了优化
输出电压可调范围:0.6V~5V
集成45mΩ/23mΩ功率开关
逐周期电流限制保护
预偏置兼容软启动,时间1.5ms或外部可调可选
Power Good指示可选
输出欠压保护
过热保护
输入欠压锁定保护
TSOT-23-6(FC)或TSOT-23-8(FC)封装
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