Linear LTC3869双路高性能降压开关电源解决方案
Linear公司的LTC3869是高性能双路同步降压开关电源控制器,采用恒频电流模式架构,能驱动所有的N沟同步功率MOSFET,精确的多相电流匹配, RSENSE或DCR电流检测,输出电压精度±0.75% 0.6V,可锁相频率从250kHz到780kHz,效率高达95%,VIN电压从4V到38V,VOUT输出电压从0.6V到12.5V,主要用在服务器系统,通信系统,工业和医疗设备,DC分布电源系统和以大功率电池为能源的设备.本文介绍了LTC3869主要特性,方框图, 采用电阻和电感DCR检测电流框图以及多种应用电路图.
The LTC®3869 is a high performance dual synchronous step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 780kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out-of-phase.
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