PM6641中文资料用于超移动PC（UMPC）应用的芯片组单片式VR和DDR2/3电源数据手册ST规格书

描述 Description

The PM6641 is a monolithic voltage regulator module specifically designed to supply DDR2/3 memory and chipset in ultra-mobile PC and real estate constrained portable systems.

It integrates three independent, adjustable, constant frequency buck converters, a ±2 Apk low drop-out (LDO) linear regulator and a ±15 mA low noise buffered reference.

Each regulator provides basic UV and OV protections, programmable soft-start and current limit and active soft-end.

Pulse-skipping technique is performed to increase efficiency at very light load.

特性 Features

• Separate Power Good signals
• Selectable tracking discharge for VDDQ
• Programmable current limit and soft-start for all outputs
• Pulse skipping at light load
• Thermal protection
• Latched OVP, UVP protection
• S0-S5 states compliant DDR2/3 section
• ±2 Apk LDO for DDR2/3 termination (VTT) with foldback
• 0.8 V ±1% internal voltage reference
• Fast response, constant frequency, current mode control
• 2.7 V to 5.5 V input voltage range
• Low noise DDR2/3 reference (VTTREF)
• Active soft-end for all outputs
• Three independent, adjustable, out-of-phase SMPS for DDR2/3 (VDDQ) and chipset supply

简介

PM6641属于集成电路（IC）的特殊用途稳压器。由制造生产的PM6641特殊用途稳压器该系列产品用于电源控制、某种形式的转换，适用于特定的复杂应用。因此，各种产品特性集差异较大，包括空燃比传感器接口、汽车交流发电机电压调节、DDR 端接、液体透镜控制、摩托车转向信号控制、热电 (peltier) 冷却器控制、压电触觉控制、阀门控制、小型发动机管理等。