ADI LTM4658高效10A降压DC/DC μModule稳压方案

ADI公司的LTM4658是低VIN高效10A降压DC/DC μModule稳压器,采用微型4mm × 4mm × 4.32mm LGA封装.封装内的元器件包括开关控制器,功率MOSFET,电感和所有支持元件.输入电压为2.25V到5.5V,输出电压由外接电阻设定为0.5V到VIN.它的高效率设计可提供10A连续电流.仅需要输入和输出陶瓷电容.LTM4658采用安静开关器2架构,内部热回路旁路电容在高开关频率是获得低EMI和高效率.器件支持频率同步,多相工作,可选择脉冲跳跃模式工作,输出电压跟踪用于电源轨加序.它的开关频率和电流模式架构使得线路和负载变化具有非常快瞬态响应而不会牺牲稳定性.故障保护特性包括过压,过流和超温保护.主要用在电讯,数据通信和网络系统,光模块和工业设备以及点负载稳压.本文介绍了LTM4658主要特性, 简化框图和多种应用电路, 演示板DC2861A主要指标,测试建立图,电路图和材料清单.

The LTMR4658 is a complete 10A step-down switching mode μModuleR regulator in a tiny 4mm × 4mm × 4.32mm LGA package. Included in the package are the switching

controller, power MOSFETs, inductor and all support components. Operating over an input voltage range of 2.25V to 5.5V, the LTM4658 supports an output voltage range of 0.5V to VIN set by external resistors. Its high efficiency design delivers 10A continuous output current. Only ceramic input and output capacitors are needed.

The LTM4658 employs a Silent Switcher 2 architecture with internal hot loop bypass capacitors to achieve both low EMI and high efficiency at high switching frequencies.

The LTM4658 also supports frequency synchronization, multiphase operation, selectable pulse-skipping mode operation, output voltage tracking for supply rail sequencing. Its high switching frequency and a current mode architecture enables a very fast transient response to line and load changes without sacrificing stability.

Fault protection features include overvoltage, overcurrent and overtemperature protection. The LTM4658 is Pb-Free and RoHS compliant.

LTM4658主要特性:

n Tiny Surface Mount, 4mm . 4mm . 4.32mm LGA Package

n Silent Switcher®2 Architecture