Maxim MAX20796两相PMBus接口可升级电压稳压器解决方案

Maxim公司的MAX20796是全集成高效率两相开关稳压器,工作电压从4.5V到16V,负载电流高达60A,外接功率级三相可达90A.通过占空比的某些限制输出电压可配置在0.5V至5.5V.开关稳压器采用固定频率控制方案,具有极紧凑快速和精确的服务器和通信应用的供电解决方案.集成的线性稳压器允许使用单电源工作.为了进一步提高系统效率和热性能,外接3.3V电源或FET用来产生核电源.主要的系统参数可以通过外接电阻进行配置,包括选择软起动时序,输出电压,开关频率, PMBus地址,过电流跳闸点和回路控制参数.器件可工作在耦合电感或分立电感,而耦合电感技术提供高性能与最低数量的输入和输出电容.在VIN = 12V, VOUT = 1V时峰值效率为92%,满负载效率为90%.器件工作结温-40C至125C,封装为35引脚4 ×10.5mm, 0.5mm点距的FC2QFN封装.主要用在点负载电压稳压器,通信,网络,服务器和存储设备,微处理器芯片组和存储器VDDQ以及I/O和辅助电源.本文介绍了MAX20796主要优势和特性,框图,多种应用电路,以及评估板MAX20796 EVK主要特性,电路图,材料清单和PCB设计图.

The MAX20796 offers a fully integrated, highly efficient, two-phase switching regulator for applications operating from 4.5V to 16V and requiring up to 60A maximum load or 90A with an optional third-phase external power stage. The output voltage range can be configured from 0.5V to 5.5V with some restrictions on duty cycle. The switching regulator uses a fixed-frequency control scheme providing an extremely compact, fast, and accurate power delivery solution for server and telecom applications. Integrated linear regulators allow single-supply operation. To further improve system efficiency and thermal performance, an external 3.3V supply or FET can be used to generate the core supply.

Key system parameters are configured by external resistors, including the selection of soft-start timing, output voltage, switching frequency, PMBus address, overcurrent trip point, and loop control parameters. The device operates with either coupled or discrete inductors. Coupled induc­tor technology offers high performance with a minimum number of input and out...