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The RT5753 is a simple, easy-to-use, 3A synchronous step-down DC-DC converter with an input supply voltage range from 2.5V to 6V. The device builds in an accurate 0.6V reference voltage and integrates low R<sub>DS(ON)</sub> power MOSFETs to achieve high efficiency in WDFN-8L 2x2 and WDFN-8SL 2x2 packages. <br /><br />The RT5753 adopts Advanced Constant On-Time (ACOT<sup>&reg;</sup>) control architecture to provide an ultrafast transient response with few external components and to operate in nearly constant switching frequency over the line, load, and output voltage range. The RT5753A/C/E/F operates in automatic PSM that maintains high efficiency during light load operation. The RT5753B/D operates in Forced PWM that helps to meet tight voltage regulation accuracy requirements. <br /><br />The RT5753 senses both FETs current for a robust overcurrent protection. The device features cycle-by-cycle current limit protection which prevents the device from the catastrophic damage in output short circuit, over current or inductor saturation. A built-in soft-start function prevents inrush current during start-up. The device also includes input undervoltage lockout, output undervoltage protection, overvoltage protection (RT5753AL/BL/CL/DL/EL/FL) and over-temperature protection to provide safe and smooth operation in all operating conditions.
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  • 输入电压范围：2.5V-6V
  • 集成 100mΩ/70mΩ 功率开关
  • 以 100% 占空比实现超低压差工作
  • 内部集成 1% 精度参考电压源
  • 典型工作频率：1.2MHz
  • 轻载节能模式（RT5753A/C/E/F）
  • ACOT® 控制架构
  • 内部集成 1.5ms/750μs 软启动
  • 使能控制输入
  • Power Good 指示
  • 上下桥均参与过流保护
  • 负电流过流保护（RT5753B/D）
  • 输入欠压锁定保护
  • 输出欠压保护
  • 过热保护
  • 符合 RoHS 规范，不含卤素
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移动电话和手持装置 机顶盒和调制解调器 WLAN 设备 ASIC 电源和存储装置电源 通用负载点低压 Buck 转换器
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