ADI ADP5055三路降压稳压器电源解决方案

ADI公司的ADP5055在43端栅格阵列(LGA)封装内组合三个高性能降压稳压器,满足苛刻的性能和PCB板空间的要求.器件不用预稳压器而能直接来年接到高达18V的输入电压.所有通路集成高边和低边功率金属氧化物半导体场效应晶体管(MOSFET)以达到最佳效率解决方案.通路1和通路2提供可编程输出电流3.5A或7A,或在并联工作时提供单输出多达14A电流.通路3提供可编输出电流1.5A或3A. ADP5055的开关频率可编程或和外接时钟同步.器件每路包括使能引脚(ENx),用来简化加电次序或可调整欠压锁住(UVLO)阈值. ADP5055还集成高精度8位DAC,使得通过PMBus®兼容2线接口能对输出电压进行动态电压调节(DVS). PMBus接口提供其它灵活配置如起动和关断次序控制,单脉冲宽度调制或省功率模式(FPWM或PSM)选择,输出放电开关,和功率良好信号.器件工作结温−40°C到+150°C.器件输入电压范围2.75V到18V,偏压输入电压范围为4.5V到18V.主要用在小型基站,FPGA和处理器应用,安全和监视,医疗应用.本文介绍了ADP5055主要特性,功能框图,多种应用电路,以及评估板ADP5055-EVALZ主要特性,电路图,材料清单和PCB设计图.

The ADP5055 combines three high performance buck regulators in a 43-terminal land grid array (LGA) package that meets the demanding performance and board space requirements. The device enables direct connection to high input voltages up to 18 V with no preregulators. All channels integrate both high-side and low-side power metal- oxide semiconductor field effect transistors (MOSFETs) to achieve an efficiency optimized solution. Channel 1 and Channel 2 deliver a programmable output current of 3.5 A or 7 A or provide a single output with up to 14 A of current in parallel operation. Channel 3 delivers a programmable output current of 1.5 A or 3 A.

The switching frequency of the ADP5055 can be programmed or synchronized to an external clock. The ADP5055 contains an enable pin (ENx) on each channel for simple power-up sequencing or adjustable undervoltage lockout (UVLO) threshold. The ADP5055 integrates a high precision 8-bit digital-to-analog converter (DAC) to enable the output voltage dynamic voltage scaling (DVS) via the PMBus®-compatible, 2-...