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The RT8058A is a current mode PWM step-down converter. The chip is ideal for fixed frequency and low ripple applications over full range of load conditions. Its input voltage range is from 2.6V to 5.5V with a constant 1.2MHz switching frequency that allows it to adopt tiny, low cost capacitors and inductors with 2mm or less in height making it ideal for single-cell Li-lon/polymer battery applications. The low on resistance internal MOSFET can achieve high efficiency without the need of external schottky diodes in wide operating ranges and the output voltage is adjustable from 0.6V to 5V that can provide up to 2A load current. The RT8058A operates at 100% duty cycle for low dropout operation that extends battery life in portable devices.
The RT8058A is available in a WDFN-10L 3x3 package.
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  • 0.6V的参考电压允许低电压输出
  • 近100%的占空比操作允许输出低压降转换
  • 2A 负载电流
  • < 2μA 的停机电流
  • 效率高达 95%
  • 不需外接萧特基二极管
  • 恒定切换频率1.2MHz
  • 低RDS(ON) 的内部开关
  • 具内部补偿机制
  • 内建缓启动机制
  • 过热保护
  • 短路保护机制
  • 10-引脚的 WDFN 封装
  • 符合RoHS规范与无卤特性
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Portable Instruments Microprocessors and DSP Core supplies Cellular Telephones Wireless and DSL Modems Digital Cameras PC Cards
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