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MP28167GQ-A-Z 是 MPS(Monolithic Power Systems)推出的一款升降压型同步开关稳压器,采用降压-升压(buck-boost)拓扑,集成高效内置开关管和同步整流。该器件输入电压范围宽(2.8V~22V),输出电压可调(1V~20.47V),可提供最高 3A 持续输出电流,工作温度范围 -40°C ~ +125°C(@TJ)。封装为 QFN-16 (3×3mm),适合空间受限的中高功率点位供电应用。
MP28167 采用降压-升压拓扑,在输入电压高于、等于或低于目标输出电压时均能稳定工作。内部包含高、低侧同步 MOSFET 以提高转换效率,控制器会根据电感电流与输出电压反馈调整占空比与工作模式。器件提供轻载高效模式以降低静态损耗,频率可选以在尺寸与效率之间做权衡;软启动与可调限流功能有助于控制启动浪涌和系统保护。
器件集成多重保护机制:可调过流限流、打嗝限流(hiccup)以应对短路或重载、输出放电以确保输出在关断时能快速释放残压、保护锁死功能在安全事件后锁定输出以防重复故障。设计时应合理设置限流阈值与软启动时间,配合外部熔断或热保护措施,确保系统在极端工况下仍能安全恢复或提示故障。
QFN-16 (3×3mm) 小尺寸有利于高密度应用,但热阻较大,建议在 PCB 下方敷铜大热焊盘并通过多层热盲孔与底层铜箔连接,以提升散热能力。高功率工作时需关注结温上升,布板时保证足够的散热面积和空气流通空间,必要时使用散热铜箔或散热体。
总结:MP28167GQ-A-Z 为一款功能全面的升降压同步开关稳压器,适用于输入电压波动大且需稳定输出的中高功率点位供电场景。合理的外部器件选型与 PCB 热设计能充分发挥其高效、可靠与集成化的优势。有关引脚定义、典型应用电路与具体外设建议,请参见原厂数据手册以获取完整参数与布局示意。
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Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
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