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.

Key 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
Product Specifications
DescriptionVersionSize
DS5279: Monolithic VR for chipset and DDR2/3 supply for ultra-mobile PC (UMPC) applications3.02 MB
Application Notes
DescriptionVersionSize
AN2787: Monolithic VR demonstration board for chipset and DDR2/3 supply for ultramobile PC (UMPC) applications1.02 MB
Brochures
DescriptionVersionSize
Brochure Power management guide05.20164 MB
Solution Evaluation Tools
Part NumberManufacturerDescription
STEVAL-ISA050V1Monolithic 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
Part NumberPackagePacking TypeUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
PM6641TRVFQFPN 48 7x7x1.0Tape And Reel2.6361000NECEAR99PHILIPPINES
PM6641VFQFPN 48 7x7x1.0Tray2.6361000NECEAR99MALAYSIA
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
PM6641TRVFQFPN 48 7x7x1.0IndustrialEcopack2md_v0-wspc-vfqfpn-wspc-7x7x1.0-wspc-48-wspc-pitch-wspc-0.5_8bv0-wspc-un46ba6_vers2_signed.pdf
md_v0-wspc-vfqfpn-wspc-7x7x1.0-wspc-48-wspc-pitch-wspc-0.5_8bv0-wspc-un46ba6.xml
PM6641VFQFPN 48 7x7x1.0IndustrialEcopack2
Monolithic VR for chipset and DDR2/3 supply for ultra-mobile PC (UMPC) applications PM6641
circuit_diagram_13510_thumbnail.png PM6641
Monolithic VR demonstration board for chipset and DDR2/3 supply for ultramobile PC (UMPC) applications STEVAL-ISA050V1
Very low drop voltage regulators with inhibit KFXX
md_v0-wspc-vfqfpn-wspc-7x7x1.0-wspc-48-wspc-pitch-wspc-0.5_8bv0-wspc-un46ba6_vers2_signed.pdf PM6641
md_v0-wspc-vfqfpn-wspc-7x7x1.0-wspc-48-wspc-pitch-wspc-0.5_8bv0-wspc-un46ba6.xml PM6641