Intersil ISL8018低静态电流8A高效降压电源解决方案
Intersil公司的ISL8018是低静态电流8A高效同步降压电源稳压器,输出电压2.7V-5.5V,输出电压从0.6V到VIN可调,效率高达97%,可调频率从500kHz到4MHz,在不能时软起动放电,8A输出电流压降250mV,主要用在DC/DC POL模块,μC/μP, FPGA和 DSP电源,路由器和交换机插入DC/DC模块,手持仪表,测量和测试系统以及用锂电池的设备.本文介绍了ISL8018主要特性,框图,应用电路,以及演示板ISL8018DEMO1Z主要特性,框图,电路图,材料清单和PCB设计图.
The ISL8018 is a high efficiency, monolithic, synchronousstep-down DC/DC converter that can deliver up to 8A continuousoutput current from a 2.7V to 5.5V input supply. The outputvoltage is adjustable from 0.6V to VIN. With an adjustable currentlimit, reverse current protection, prebias start andover-temperature protection, the ISL8018 offers a highly robustpower solution. It uses current control architecture to deliver fasttransient response and excellent loop stability.
The ISL8018 integrates a pair of low ON-resistance P-channeland N-channel internal MOSFETs to maximize efficiency andminimize external component count. 100% duty-cycle operationallows less than 250mV dropout at 8A output current. Adjustable frequency and synchronization allow the ISL8018 to be used inapplications requiring low noise.
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