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The RT7277 is a synchronous step-down DC/DC converter with Advanced Constant On-Time (ACOTTM) mode control. It achieves high power density to deliver up to 3A output current from a 4.5V to 18V input supply. The proprietary ACOTTM mode offers an optimal transient response over a wide range of loads and all kinds of ceramic capacitors, which allows the device to adopt very low ESR output capacitors for ensuring performance stabilization. In addition, RT7277 keeps an excellent constant switching frequency under line and load variation and the integrated synchronous power switches with the ACOTTM mode operation provides high efficiency in whole output current load range. Cycle-by-cycle current limit provides an accurate protection by a valley detection of low side MOSFET and external soft-start setting eliminates input current surge during startup. Protection functions also include output under voltage protection, output over voltage protection, and thermal shutdown.
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  • ACOT™模式实现快速瞬态响应
  • 4.5V-18V的输入电压范围
  • 3A输出电流
  • 60mΩ低内阻N型金氧半场效晶体管
  • 先进的固定导通时间控制
  • 支持所有陶瓷电容
  • 效率高达95%
  • 700kHz的切换频率
  • 0.765V-8V的可调输出电压
  • 可调软启动
  • 逐周期电流限制
  • 输入欠压锁定
  • 热关断
  • 通过RoHS认证，且不含卤素
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工业和商用低功率系统 计算机外设 液晶显示器和电视 节能电器设备 高性能 DSP、FPGA、ASIC 使用的负载点调节器
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