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

Circuit Diagram

0 Download

circuit_diagram_13510_thumbnail.png

Design

Technical Documentation

Product Specifications
Description Version Size
DS5279 DS5279: Monolithic VR for chipset and DDR2/3 supply for ultra-mobile PC (UMPC) applications 3.0 2 MB
Application Notes
Description Version Size
AN2787 AN2787: Monolithic VR demonstration board for chipset and DDR2/3 supply for ultramobile PC (UMPC) applications 1.0 2 MB

Publications and Collaterals

Brochures
Description Version Size
Brochure Power management guide 05.2016 4 MB

Tools and Software

Evaluation Tools
Solution Evaluation Tools
eDesignSuite Support & Community
Related Products




Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
PM6641TR VFQFPN 48 7x7x1.0 Tape And Reel Active 2.636 1000 NEC EAR99 PHILIPPINES MORE INFO DISTRIBUTOR AVAILABILITY
PM6641 VFQFPN 48 7x7x1.0 Tray Active 2.636 1000 NEC EAR99 MALAYSIA MORE INFO
test

(*) 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

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
PM6641TR ActiveVFQFPN 48 7x7x1.0IndustrialEcopack2
PM6641 ActiveVFQFPN 48 7x7x1.0IndustrialEcopack2
test

(**) 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.

×