ST Life.augmented

PM6641

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

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.

pdf Please read
Errata Sheet
pdf Download
Datasheet

Key Features

  • 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

Circuit Diagram

Design Resources

Top

Technical Documentation

Product Specifications

Description Version Size
pdf
DS5279: Monolithic VR for chipset and DDR2/3 supply for ultra-mobile PC (UMPC) applications
3.0 2,255 KB

Application Notes

Description Version Size
pdf
AN2787: Monolithic VR demonstration board for chipset and DDR2/3 supply for ultramobile PC (UMPC) applications
1.0 2,594 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STEVAL-ISA050V1 Monolithic VR for chipset and DDR2/3 demonstration board based on the PM6641 Monolithic VR for Chipset and DDR2/3 Supply for Ultra-Mobile PC (UMPC) applications

Sample & Buy

Top
Part Number Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
@
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
PM6641ActiveVFQFPN 48 7x7x1.0Tray_-Distributor reported inventory date: 2014-11-21
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA7141560
AVNETOrder NowAMERICA14600
RS COMPONENTSOrder NowEUROPE1451
Ecopack2-
PM6641TRActiveVFQFPN 48 7x7x1.0Tape And Reel_-Distributor reported inventory date: 2014-11-21
Distributor NameRegionStockMin. order
DIGIKEYOrder NowWORLDWIDE3071
MOUSEROrder NowWORLDWIDE7361
Ecopack2-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Feedback Form
Customer Feedback