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The RT4822 integrates built-in power transistors, synchronous rectification, and low supply current to provide a compact solution for systems using advanced Li-Ion battery chemistries. The RT4822 is capable of supplying significant energy when the battery voltage is lower than the required voltage for system power ICs.<br /><br />The RT4822 is a boost regulator designed to provide a minimum output voltage from a single-cell Li-Ion battery, even when the battery voltage is below system minimum. In boost mode, output voltage regulation is guaranteed to a maximum load current of 1500mA. Quiescent current in shutdown mode is less than 1&mu;A, which maximizes the battery life. The regulator transitions smoothly between bypass and normal boost mode. The device can be forced into bypass mode to reduce quiescent current.<br /><br />The RT4822 is available in the WL-CSP-9B 1.3x1.2 (BSC) package.
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  • 静态电流消耗低
  • 启动时间小于 400μs
  • 仅需 3 只外围元件：1μH 电感，0402 规格输入电容和 0603 规格输出电容
  • 输入电压范围：1.8V~5.5V
  • 输出电压 3.15V~5.5V 可调，级差 25mV
  • 可工作于输入电压高于输出电压的环境
  • 预设 Boost 模式输出电压为 5V
  • 最大连续负载能力：1.5A@VOUT=5V, VIN>3.6V
  • 效率可达 93%
  • 内置同步续流开关
  • 过流保护
  • 逐周期电流限制
  • 欠压保护
  • 过压保护
  • 短路保护
  • 过热保护
  • WL-CSP-9B 1.3x1.2 (BSC) 封装
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NFC 设备供电 USB 充电端口 计算机配件如键盘、鼠标等 无线耳机 游戏设备传感器
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