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The RT8123A is a high efficiency single phase synchronous buck DC/DC controller with 5V/12V supply voltage. At light load condition, the IC automatically operates in the pulse skip mode to reduce switching frequency so as to improve conversion efficiency. As the load current increases, the RT8123A leaves the pulse skip mode and operates in the continuous conduction mode with fixed-frequency PWM. <p align="justify">The RT8123A has embedded MOSFET gate driver with high driving capability, supporting driving voltage up to 12V for high output current application. Other features include power good indication, external error-amp compensation, over voltage protection, over current protection, enable/disable control and internal Soft-Start. With the above functions, the IC provides customers a cost-effective solution for high efficiency power conversion. The RT8123A is available in a WQFN-16L 3x3 package.</p>
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  • 高性能运算误差放大器
  • 内部软启动/停止
  • ±0.5%内部电压准确度, 0.8V参考电压
  • 具防误触发功能的过流保护
  • “无损”差动电感电流检测
  • 内置高精度电流检测放大器
  • 振荡器频率100kHz~1000kHz
  • 内部栅极驱动器的20ns适合FET非重迭时间
  • 5V~12V操作
  • 支持VIN 1.5V~19V
  • 0.8V~3.3V VOUT
  • RT/EN引脚始能控制
  • 栓锁过压保护(OVP)
  • 内部固定OCP阈值
  • 保证启动时进入预充电负载
  • 热补偿电流监测
  • 过热关机保护
  • 内建MOSFET驱动器
  • 集成升压二极管, 内置RBST = 2.2Ω
  • 在轻载运作时, 自动进入省电模式以将效能最大化
  • 同步功能
  • 远程感测
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内存和终端支持 子系统电源(MCH, IOCH, PCI) CPU和DSP电源 分布式电源 通用DC/DC转换器
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