PM6641 Monolithic VR for Chipset and DDR2/3 Supply for Ultra-Mobile PC (UMPC) Applications

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

技术特性

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

功能框图

PM6641 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
PM6641TR	Active		1000	VFQFPN 48 7x7x1.0	Tape And Reel		PM6641TR
PM6641	Active		1000	VFQFPN 48 7x7x1.0	Tube		PM6641

DATASHEET

描述	版本	大小
PM6641 : Monolithic VR for chipset and DDR2/3 supply for ultra-mobile PC (UMPC) applications	3	2255KB

APPLICATION NOTES

描述	版本	大小
AN2787: Monolithic VR demonstration board for chipset and DDR2/3 supply for ultramobile PC (UMPC) applications	1	2594KB