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  • 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

Recommended for you

Evaluation Tools

    • Part Number

      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

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS5279
      Monolithic VR for chipset and DDR2/3 supply for ultra-mobile PC (UMPC) applications
      3.0
      2.2 MB
      PDF
      DS5279

      Monolithic VR for chipset and DDR2/3 supply for ultra-mobile PC (UMPC) applications

    • Description Version Size Action
      AN2787
      Monolithic VR demonstration board for chipset and DDR2/3 supply for ultramobile PC (UMPC) applications
      1.0
      2.53 MB
      PDF
      AN2787

      Monolithic VR demonstration board for chipset and DDR2/3 supply for ultramobile PC (UMPC) applications

    • Description Version Size Action
      TN1224
      Mounting instructions for SMD (surface mounting device) packages
      2.2
      1.06 MB
      PDF
      TN1224

      Mounting instructions for SMD (surface mounting device) packages

    • Description Version Size Action
      AN2787
      Monolithic VR demonstration board for chipset and DDR2/3 supply for ultramobile PC (UMPC) applications
      1.0
      2.53 MB
      PDF
      AN2787

      Monolithic VR demonstration board for chipset and DDR2/3 supply for ultramobile PC (UMPC) applications

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
PM6641
Active
QFN48 7x7 Industrial Ecopack2
PM6641TR
Active
QFN48 7x7 Industrial Ecopack2

PM6641

Package:

QFN48 7x7

Material Declaration**:

Marketing Status

Active

Package

QFN48 7x7

Grade

Industrial

RoHS Compliance Grade

Ecopack2

PM6641TR

Package:

QFN48 7x7

Material Declaration**:

PDF XML

Marketing Status

Active

Package

QFN48 7x7

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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.

eDesignSuite

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
PM6641TR Available at 4 distributors

Distributor availability ofPM6641TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3073 1 Order Now
Newark Element14 AMERICA 50 0 Order Now
MOUSER WORLDWIDE 2380 1 Order Now
Farnell Element14 EUROPE 4760 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

3073

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

50

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2380

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4760

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

Buy now
Active
EAR99 NEC Tape And Reel QFN48 7x7 - - PHILIPPINES 2.636 / 1k
PM6641 No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tray QFN48 7x7 - - PHILIPPINES 2.636 / 1k

PM6641TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

2.636 / 1k

Distributor availability ofPM6641TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3073 1 Order Now
Newark Element14 AMERICA 50 0 Order Now
MOUSER WORLDWIDE 2380 1 Order Now
Farnell Element14 EUROPE 4760 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

3073

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

50

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2380

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4760

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFN48 7x7

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

2.636 / 1k

Country of Origin

PHILIPPINES

PM6641

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

2.636 / 1k

ECCN (EU)

NEC

Packing Type

Tray

Package

QFN48 7x7

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

2.636 / 1k

Country of Origin

PHILIPPINES

(*) 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