NS LP5552 PWI 2.0低功耗手提设备电源方案

NS公司的LP5552 是PWI 2.0与PowerWise技术兼容的能;量管理单元(EMU),可降低成本低功耗手提设备的功耗. LP5552包括两个先进的数控开关稳压器,为SoC或处理器提供可变电源.器件还包括5个可编低压降低噪音线性稳压器,用来给I/O,外设逻辑区块,辅助系统功能供电,并维持关断模式下存储器的保持力(双域). LP5552输入电压从2.7V到4.8V,输出电压精度在±2%,输出电压0.6V — 1.235V可编程,输出电流达800mA,效率高达88%.主要应用在GSM/GPRS/EDGE 和UMTS 蜂窝手,手持无线电和PDA等.本文介绍了LP5552的主要特性,系统方框图, LP5552评估板电路图和材料清单(BOM).

LP5552: PWI 2.0 and PowerWise  Technology Compliant Energy Management Unit

The LP5552 is a PWI™ 2.0 compliant Energy Management Unit (EMU) for reducing power consumption in low-power, portable applications.
The LP5552 contains 2 advanced, digitally controlled switching regulators for supplying variable voltages to a SoC or processor. The device also incorporates 5 programmable
low-dropout, low-noise linear regulators for powering I/O, peripheral logic blocks, auxiliary system functions, and maintaining memory retention (dual-domains) in shutdown-mode.
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