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LM25017为48V同步降压稳压器，集成了高侧和低侧MOSFET（金属-氧化层半导体场效晶体管）。此篇主要介绍了LM25017特性、应用范围、参考设计电路以及电路分析，帮助大家缩短设计时间。

LM25017特性：9V到48V的宽输入范围；集成48V、高侧和低侧开关；恒定导通时间控制；超快的瞬态响应

LM25017典型应用范围：工业设备；智能电表；电信系统；隔离式偏压电源

LM25017参考设计应用电路：

图1LM25017内部结构图

TheLM25017 is a 48V, 650mA synchronous step-down regulator with integrated high side and low side MOSFETs. The constant-on-time (COT) control scheme employed in the LM25017 requires no loop compensation, provides excellent transient response, and enables very low step-down ratios.

图2LM25017参考设计图

TheLM25017 step-down switching regulator features all the functions needed to implement a low cost, efficient,buck converter capable of supplying up to 650 mA to the load. This high voltage regulator contains 48V, Nchannel buck and synchronous switches, is easy to implement, and is provided in thermally enhanced PSOP-8 and LLP-8 packages.

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