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RT4805A允许系统利用新电池化学作用,当电池电压低于系统能源IC所需之电压时,可提供显著能源。藉由结合内置功率晶体管,同步整流和低电源电流,该IC采用先进的锂电子电池化学系统作为一个简便的解决方案。RT4805A是一个升压调节器,设计于从单节锂电池提供最小输出电压,即使电池电压低于系统最小值。在升压模式中,输出电压调节是保证2A的最大负载电流。在关机模式下的静态电流小于1μA,从而最大程度地延长电池寿命。调节器在旁路和正常升压模式中顺利转换,该装置可强制进入旁路模式,以减少静态电流。RT4805A支持WL-CSP-16B 1.67x1.67 (BSC)封装。
4少量外部组件 : 0.47μH电感和0603尺寸输入及输出电容
输入电压范围 : 1.8V~5V
输出电压范围 : 2.85V~4.4V►VSEL = L 3.6V►VSEL = H 3.7V
最大连续负载电流 : 2A@VIN > 2.65V,升压VOUT至3.35V
效率高达96%
当VIN > 目标VOUT,确实执行旁路操作
内部同步整流
关机时确实断开负载连接
强制旁路模式
VSEL控制优化目标VOUT
短路保护
I2C控制接口
超低工作静态电流
WL-CSP 16B 小封装
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